[{"page":"217402","_id":"42032","language":[{"iso":"eng"}],"series_title":"Phys. Rev. Lett.","user_id":"71124","volume":107,"year":"2011","status":"public","title":"Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress","author":[{"id":"85353","first_name":"Klaus D.","last_name":"Jöns","full_name":"Jöns, Klaus D."},{"last_name":" Hafenbrak","first_name":"R","full_name":" Hafenbrak, R"},{"first_name":"R","last_name":"Singh","full_name":"Singh, R"},{"full_name":"Ding, F","last_name":"Ding","first_name":"F"},{"first_name":"J.D","last_name":" Plumhof","full_name":" Plumhof, J.D"},{"last_name":"Rastelli","first_name":"A","full_name":"Rastelli, A"},{"full_name":" Schmidt, O.G","first_name":"O.G","last_name":" Schmidt"},{"full_name":"Bester, G","first_name":"G","last_name":"Bester"},{"full_name":"Michler, P","last_name":"Michler","first_name":"P"}],"date_updated":"2023-02-13T08:44:28Z","intvolume":"       107","date_created":"2023-02-13T08:31:47Z","type":"conference","department":[{"_id":"623"}],"citation":{"bibtex":"@article{Jöns_ Hafenbrak_Singh_Ding_ Plumhof_Rastelli_ Schmidt_Bester_Michler_2011, series={Phys. Rev. Lett.}, title={Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress}, volume={107}, author={Jöns, Klaus D. and  Hafenbrak, R and Singh, R and Ding, F and  Plumhof, J.D and Rastelli, A and  Schmidt, O.G and Bester, G and Michler, P}, year={2011}, pages={217402}, collection={Phys. Rev. Lett.} }","ama":"Jöns KD,  Hafenbrak R, Singh R, et al. Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress. 2011;107:217402.","mla":"Jöns, Klaus D., et al. <i>Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress</i>. 2011, p. 217402.","short":"K.D. Jöns, R.  Hafenbrak, R. Singh, F. Ding, J.D.  Plumhof, A. Rastelli, O.G.  Schmidt, G. Bester, P. Michler, 107 (2011) 217402.","chicago":"Jöns, Klaus D., R  Hafenbrak, R Singh, F Ding, J.D  Plumhof, A Rastelli, O.G  Schmidt, G Bester, and P Michler. “Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress.” Phys. Rev. Lett., 2011.","ieee":"K. D. Jöns <i>et al.</i>, “Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress,” vol. 107. p. 217402, 2011.","apa":"Jöns, K. D.,  Hafenbrak, R., Singh, R., Ding, F.,  Plumhof, J. D., Rastelli, A.,  Schmidt, O. G., Bester, G., &#38; Michler, P. (2011). <i>Dependence of the Redshifted and Blueshifted Photoluminescence Spectra of Single In(x)Ga(1−x)As/GaAs Quantum Dots on the Applied Uniaxial Stress</i> (Vol. 107, p. 217402)."}},{"oa":"1","external_id":{"arxiv":["1105.3419"]},"citation":{"ieee":"S. Gharibian, M. PIANI, G. ADESSO, J. CALSAMIGLIA, and P. HORODECKI, “Characterizing Quantumness via Entanglement Creation,” <i>International Journal of Quantum Information</i>, vol. 09, no. 07n08, pp. 1701–1713, 2011, doi: <a href=\"https://doi.org/10.1142/s0219749911008258\">10.1142/s0219749911008258</a>.","apa":"Gharibian, S., PIANI, M., ADESSO, G., CALSAMIGLIA, J., &#38; HORODECKI, P. (2011). Characterizing Quantumness via Entanglement Creation. <i>International Journal of Quantum Information</i>, <i>09</i>(07n08), 1701–1713. <a href=\"https://doi.org/10.1142/s0219749911008258\">https://doi.org/10.1142/s0219749911008258</a>","chicago":"Gharibian, Sevag, MARCO PIANI, GERARDO ADESSO, JOHN CALSAMIGLIA, and PAWEŁ HORODECKI. “Characterizing Quantumness via Entanglement Creation.” <i>International Journal of Quantum Information</i> 09, no. 07n08 (2011): 1701–13. <a href=\"https://doi.org/10.1142/s0219749911008258\">https://doi.org/10.1142/s0219749911008258</a>.","short":"S. Gharibian, M. PIANI, G. ADESSO, J. CALSAMIGLIA, P. HORODECKI, International Journal of Quantum Information 09 (2011) 1701–1713.","mla":"Gharibian, Sevag, et al. “Characterizing Quantumness via Entanglement Creation.” <i>International Journal of Quantum Information</i>, vol. 09, no. 07n08, World Scientific Pub Co Pte Lt, 2011, pp. 1701–13, doi:<a href=\"https://doi.org/10.1142/s0219749911008258\">10.1142/s0219749911008258</a>.","bibtex":"@article{Gharibian_PIANI_ADESSO_CALSAMIGLIA_HORODECKI_2011, title={Characterizing Quantumness via Entanglement Creation}, volume={09}, DOI={<a href=\"https://doi.org/10.1142/s0219749911008258\">10.1142/s0219749911008258</a>}, number={07n08}, journal={International Journal of Quantum Information}, publisher={World Scientific Pub Co Pte Lt}, author={Gharibian, Sevag and PIANI, MARCO and ADESSO, GERARDO and CALSAMIGLIA, JOHN and HORODECKI, PAWEŁ}, year={2011}, pages={1701–1713} }","ama":"Gharibian S, PIANI M, ADESSO G, CALSAMIGLIA J, HORODECKI P. Characterizing Quantumness via Entanglement Creation. <i>International Journal of Quantum Information</i>. 2011;09(07n08):1701-1713. doi:<a href=\"https://doi.org/10.1142/s0219749911008258\">10.1142/s0219749911008258</a>"},"volume":"09","user_id":"71541","_id":"8178","publisher":"World Scientific Pub Co Pte Lt","page":"1701-1713","status":"public","department":[{"_id":"623"},{"_id":"7"}],"type":"journal_article","date_created":"2019-03-01T12:08:55Z","extern":"1","abstract":[{"lang":"eng","text":"In [Piani et al., PRL106 (2011) 220403], an activation protocol was introduced which maps the general non-classical (multipartite) correlations between given systems into bipartite entanglement between the systems and local ancillae by means of a potentially highly entangling interaction. Here, we study how this activation protocol can be used to entangle the starting systems themselves via entanglement swapping through a measurement on the ancillae. Furthermore, we bound the relative entropy of quantumness (a naturally arising measure of non-classicality in the scheme of Piani et al. above) for a special class of separable states, the so-called classical–quantum states. In particular, we fully characterize the classical–quantum two-qubit states that are maximally non-classical."}],"publication":"International Journal of Quantum Information","issue":"07n08","doi":"10.1142/s0219749911008258","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://arxiv.org/abs/1105.3419","open_access":"1"}],"article_type":"original","intvolume":"         9","publication_status":"published","date_updated":"2023-02-28T11:04:25Z","publication_identifier":{"issn":["0219-7499","1793-6918"]},"author":[{"id":"71541","full_name":"Gharibian, Sevag","last_name":"Gharibian","orcid":"0000-0002-9992-3379","first_name":"Sevag"},{"first_name":"MARCO","last_name":"PIANI","full_name":"PIANI, MARCO"},{"first_name":"GERARDO","last_name":"ADESSO","full_name":"ADESSO, GERARDO"},{"first_name":"JOHN","last_name":"CALSAMIGLIA","full_name":"CALSAMIGLIA, JOHN"},{"first_name":"PAWEŁ","last_name":"HORODECKI","full_name":"HORODECKI, PAWEŁ"}],"title":"Characterizing Quantumness via Entanglement Creation","year":"2011"},{"abstract":[{"lang":"eng","text":"Approximation algorithms for classical constraint satisfaction problems are one of the main research areas in theoretical computer science. Here we define a natural approximation version of the QMA-complete local Hamiltonian problem and initiate its study. We present two main results. The first shows that a non-trivial approximation ratio can be obtained in the class NP using product states. The second result (which builds on the first one), gives a polynomial time (classical) algorithm providing a similar approximation ratio for dense instances of the problem. The latter result is based on an adaptation of the \"exhaustive sampling method\" by Arora et al. [J. Comp. Sys. Sci. 58, p.193 (1999)] to the quantum setting, and might be of independent interest."}],"extern":"1","publication":"IEEE Annual Conference on Computational Complexity (CCC 2011)","department":[{"_id":"623"},{"_id":"7"}],"type":"conference","date_created":"2019-03-01T12:06:18Z","date_updated":"2023-02-28T11:04:02Z","publication_status":"published","author":[{"id":"71541","orcid":"0000-0002-9992-3379","last_name":"Gharibian","first_name":"Sevag","full_name":"Gharibian, Sevag"},{"last_name":"Kempe","first_name":"Julia","full_name":"Kempe, Julia"}],"publication_identifier":{"isbn":["9781457701795"]},"title":"Approximation Algorithms for QMA-Complete Problems","year":"2011","doi":"10.1109/ccc.2011.15","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1101.3884"}],"citation":{"chicago":"Gharibian, Sevag, and Julia Kempe. “Approximation Algorithms for QMA-Complete Problems.” In <i>IEEE Annual Conference on Computational Complexity (CCC 2011)</i>. IEEE, 2011. <a href=\"https://doi.org/10.1109/ccc.2011.15\">https://doi.org/10.1109/ccc.2011.15</a>.","short":"S. Gharibian, J. Kempe, in: IEEE Annual Conference on Computational Complexity (CCC 2011), IEEE, 2011.","ieee":"S. Gharibian and J. Kempe, “Approximation Algorithms for QMA-Complete Problems,” presented at the 2011 IEEE 26th Annual Conference on Computational Complexity (CCC), San Jose, USA, 2011, doi: <a href=\"https://doi.org/10.1109/ccc.2011.15\">10.1109/ccc.2011.15</a>.","apa":"Gharibian, S., &#38; Kempe, J. (2011). Approximation Algorithms for QMA-Complete Problems. <i>IEEE Annual Conference on Computational Complexity (CCC 2011)</i>. 2011 IEEE 26th Annual Conference on Computational Complexity (CCC), San Jose, USA. <a href=\"https://doi.org/10.1109/ccc.2011.15\">https://doi.org/10.1109/ccc.2011.15</a>","bibtex":"@inproceedings{Gharibian_Kempe_2011, title={Approximation Algorithms for QMA-Complete Problems}, DOI={<a href=\"https://doi.org/10.1109/ccc.2011.15\">10.1109/ccc.2011.15</a>}, booktitle={IEEE Annual Conference on Computational Complexity (CCC 2011)}, publisher={IEEE}, author={Gharibian, Sevag and Kempe, Julia}, year={2011} }","ama":"Gharibian S, Kempe J. Approximation Algorithms for QMA-Complete Problems. In: <i>IEEE Annual Conference on Computational Complexity (CCC 2011)</i>. IEEE; 2011. doi:<a href=\"https://doi.org/10.1109/ccc.2011.15\">10.1109/ccc.2011.15</a>","mla":"Gharibian, Sevag, and Julia Kempe. “Approximation Algorithms for QMA-Complete Problems.” <i>IEEE Annual Conference on Computational Complexity (CCC 2011)</i>, IEEE, 2011, doi:<a href=\"https://doi.org/10.1109/ccc.2011.15\">10.1109/ccc.2011.15</a>."},"oa":"1","external_id":{"arxiv":["1101.3884"]},"conference":{"location":"San Jose, USA","name":"2011 IEEE 26th Annual Conference on Computational Complexity (CCC)"},"status":"public","user_id":"71541","publisher":"IEEE","_id":"8176"},{"issue":"22","publication":"Physical Review Letters","extern":"1","abstract":[{"lang":"eng","text":"We devise a protocol in which general nonclassical multipartite correlations produce a physically relevant effect, leading to the creation of bipartite entanglement. In particular, we show that the relative entropy of quantumness, which measures all nonclassical correlations among subsystems of a quantum system, is equivalent to and can be operationally interpreted as the minimum distillable entanglement generated between the system and local ancillae in our protocol. We emphasize the key role of state mixedness in maximizing nonclassicality: Mixed entangled states can be arbitrarily more nonclassical than separable and pure entangled states."}],"date_created":"2019-03-01T12:07:49Z","department":[{"_id":"623"},{"_id":"7"}],"type":"journal_article","publication_identifier":{"issn":["0031-9007","1079-7114"]},"author":[{"full_name":"Piani, Marco","first_name":"Marco","last_name":"Piani"},{"full_name":"Gharibian, Sevag","orcid":"0000-0002-9992-3379","first_name":"Sevag","last_name":"Gharibian","id":"71541"},{"last_name":"Adesso","first_name":"Gerardo","full_name":"Adesso, Gerardo"},{"full_name":"Calsamiglia, John","first_name":"John","last_name":"Calsamiglia"},{"first_name":"Paweł","last_name":"Horodecki","full_name":"Horodecki, Paweł"},{"last_name":"Winter","first_name":"Andreas","full_name":"Winter, Andreas"}],"year":"2011","title":"All Nonclassical Correlations Can Be Activated into Distillable Entanglement","article_type":"original","intvolume":"       106","publication_status":"published","date_updated":"2023-02-28T11:04:13Z","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://arxiv.org/abs/1103.4032","open_access":"1"}],"doi":"10.1103/physrevlett.106.220403","citation":{"ieee":"M. Piani, S. Gharibian, G. Adesso, J. Calsamiglia, P. Horodecki, and A. Winter, “All Nonclassical Correlations Can Be Activated into Distillable Entanglement,” <i>Physical Review Letters</i>, vol. 106, no. 22, 2011, doi: <a href=\"https://doi.org/10.1103/physrevlett.106.220403\">10.1103/physrevlett.106.220403</a>.","apa":"Piani, M., Gharibian, S., Adesso, G., Calsamiglia, J., Horodecki, P., &#38; Winter, A. (2011). All Nonclassical Correlations Can Be Activated into Distillable Entanglement. <i>Physical Review Letters</i>, <i>106</i>(22). <a href=\"https://doi.org/10.1103/physrevlett.106.220403\">https://doi.org/10.1103/physrevlett.106.220403</a>","short":"M. Piani, S. Gharibian, G. Adesso, J. Calsamiglia, P. Horodecki, A. Winter, Physical Review Letters 106 (2011).","chicago":"Piani, Marco, Sevag Gharibian, Gerardo Adesso, John Calsamiglia, Paweł Horodecki, and Andreas Winter. “All Nonclassical Correlations Can Be Activated into Distillable Entanglement.” <i>Physical Review Letters</i> 106, no. 22 (2011). <a href=\"https://doi.org/10.1103/physrevlett.106.220403\">https://doi.org/10.1103/physrevlett.106.220403</a>.","mla":"Piani, Marco, et al. “All Nonclassical Correlations Can Be Activated into Distillable Entanglement.” <i>Physical Review Letters</i>, vol. 106, no. 22, American Physical Society (APS), 2011, doi:<a href=\"https://doi.org/10.1103/physrevlett.106.220403\">10.1103/physrevlett.106.220403</a>.","bibtex":"@article{Piani_Gharibian_Adesso_Calsamiglia_Horodecki_Winter_2011, title={All Nonclassical Correlations Can Be Activated into Distillable Entanglement}, volume={106}, DOI={<a href=\"https://doi.org/10.1103/physrevlett.106.220403\">10.1103/physrevlett.106.220403</a>}, number={22}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Piani, Marco and Gharibian, Sevag and Adesso, Gerardo and Calsamiglia, John and Horodecki, Paweł and Winter, Andreas}, year={2011} }","ama":"Piani M, Gharibian S, Adesso G, Calsamiglia J, Horodecki P, Winter A. All Nonclassical Correlations Can Be Activated into Distillable Entanglement. <i>Physical Review Letters</i>. 2011;106(22). doi:<a href=\"https://doi.org/10.1103/physrevlett.106.220403\">10.1103/physrevlett.106.220403</a>"},"external_id":{"arxiv":["1103.4032"]},"oa":"1","status":"public","publisher":"American Physical Society (APS)","_id":"8177","volume":106,"user_id":"71541"},{"user_id":"71124","volume":21,"article_number":"125606 ","_id":"42030","series_title":"Nanotechnology ","language":[{"iso":"eng"}],"date_updated":"2023-02-13T08:44:48Z","intvolume":"        21","year":"2010","title":"Low-density MOVPE grown InGaAs QDs exhibiting ultra-narrow single exciton linewidths","status":"public","author":[{"full_name":" Richter, D","first_name":"D","last_name":" Richter"},{"last_name":"Hafenbrak","first_name":"R","full_name":"Hafenbrak, R"},{"id":"85353","last_name":"Jöns","first_name":"Klaus D.","full_name":"Jöns, Klaus D."},{"full_name":"Schulz, W-M","first_name":"W-M","last_name":"Schulz"},{"full_name":"Eichfelder, M","last_name":"Eichfelder","first_name":"M"},{"full_name":"Heldmaier, M","first_name":"M","last_name":"Heldmaier"},{"last_name":"Roßbach","first_name":"R","full_name":"Roßbach, R"},{"full_name":"Jetter, M","last_name":"Jetter","first_name":"M"},{"full_name":"Michler, P","first_name":"P","last_name":"Michler"}],"type":"conference","department":[{"_id":"623"}],"date_created":"2023-02-13T08:19:11Z","citation":{"mla":"Richter, D., et al. <i>Low-Density MOVPE Grown InGaAs QDs Exhibiting Ultra-Narrow Single Exciton Linewidths</i>. 125606, 2010.","ama":"Richter D, Hafenbrak R, Jöns KD, et al. Low-density MOVPE grown InGaAs QDs exhibiting ultra-narrow single exciton linewidths. 2010;21.","bibtex":"@article{ Richter_Hafenbrak_Jöns_Schulz_Eichfelder_Heldmaier_Roßbach_Jetter_Michler_2010, series={Nanotechnology }, title={Low-density MOVPE grown InGaAs QDs exhibiting ultra-narrow single exciton linewidths}, volume={21}, number={125606}, author={ Richter, D and Hafenbrak, R and Jöns, Klaus D. and Schulz, W-M and Eichfelder, M and Heldmaier, M and Roßbach, R and Jetter, M and Michler, P}, year={2010}, collection={Nanotechnology } }","apa":"Richter, D., Hafenbrak, R., Jöns, K. D., Schulz, W.-M., Eichfelder, M., Heldmaier, M., Roßbach, R., Jetter, M., &#38; Michler, P. (2010). <i>Low-density MOVPE grown InGaAs QDs exhibiting ultra-narrow single exciton linewidths</i> (No. 125606; Vol. 21).","ieee":"D.  Richter <i>et al.</i>, “Low-density MOVPE grown InGaAs QDs exhibiting ultra-narrow single exciton linewidths,” vol. 21. 2010.","short":"D.  Richter, R. Hafenbrak, K.D. Jöns, W.-M. Schulz, M. Eichfelder, M. Heldmaier, R. Roßbach, M. Jetter, P. Michler, 21 (2010).","chicago":"Richter, D, R Hafenbrak, Klaus D. Jöns, W-M Schulz, M Eichfelder, M Heldmaier, R Roßbach, M Jetter, and P Michler. “Low-Density MOVPE Grown InGaAs QDs Exhibiting Ultra-Narrow Single Exciton Linewidths.” Nanotechnology , 2010."}},{"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://arxiv.org/abs/0810.4507","open_access":"1"}],"author":[{"id":"71541","last_name":"Gharibian","first_name":"Sevag","orcid":"0000-0002-9992-3379","full_name":"Gharibian, Sevag"}],"year":"2010","title":"Strong NP-hardness of the quantum separability problem","article_type":"original","intvolume":"        10","publication_status":"published","date_updated":"2023-02-28T11:04:38Z","date_created":"2019-03-01T12:09:59Z","department":[{"_id":"623"},{"_id":"7"}],"type":"journal_article","issue":"3{\\&}4","publication":"Quantum Information & Computation","extern":"1","abstract":[{"lang":"eng","text":"Given the density matrix rho of a bipartite quantum state, the quantum separability problem asks whether rho is entangled or separable. In 2003, Gurvits showed that this problem is NP-hard if rho is located within an inverse exponential (with respect to dimension) distance from the border of the set of separable quantum states. In this paper, we extend this NP-hardness to an inverse polynomial distance from the separable set. The result follows from a simple combination of works by Gurvits, Ioannou, and Liu. We apply our result to show (1) an immediate lower bound on the maximum distance between a bound entangled state and the separable set (assuming P != NP), and (2) NP-hardness for the problem of determining whether a completely positive trace-preserving linear map is entanglement-breaking."}],"_id":"8179","page":"343-360","volume":10,"user_id":"71541","status":"public","external_id":{"arxiv":["0810.4507"]},"oa":"1","citation":{"mla":"Gharibian, Sevag. “Strong NP-Hardness of the Quantum Separability Problem.” <i>Quantum Information &#38; Computation</i>, vol. 10, no. 3{\\ &#38; }4, 2010, pp. 343–60.","apa":"Gharibian, S. (2010). Strong NP-hardness of the quantum separability problem. <i>Quantum Information &#38; Computation</i>, <i>10</i>(3{\\ &#38; }4), 343–360.","ieee":"S. Gharibian, “Strong NP-hardness of the quantum separability problem,” <i>Quantum Information &#38; Computation</i>, vol. 10, no. 3{\\ &#38; }4, pp. 343–360, 2010.","short":"S. Gharibian, Quantum Information &#38; Computation 10 (2010) 343–360.","ama":"Gharibian S. Strong NP-hardness of the quantum separability problem. <i>Quantum Information &#38; Computation</i>. 2010;10(3{\\ &#38; }4):343-360.","chicago":"Gharibian, Sevag. “Strong NP-Hardness of the Quantum Separability Problem.” <i>Quantum Information &#38; Computation</i> 10, no. 3{\\ &#38; }4 (2010): 343–60.","bibtex":"@article{Gharibian_2010, title={Strong NP-hardness of the quantum separability problem}, volume={10}, number={3{\\ &#38; }4}, journal={Quantum Information &#38; Computation}, author={Gharibian, Sevag}, year={2010}, pages={343–360} }"}},{"status":"public","volume":9,"user_id":"71541","_id":"8180","page":"1013-1029","citation":{"bibtex":"@article{Gharibian_Kampermann_Bru{\\ss}_2009, title={On global effects caused by locally noneffective unitary operations}, volume={9}, number={11}, journal={Quantum Information &#38; Computation}, author={Gharibian, Sevag and Kampermann, Hermann and Bru{\\ss}, Dagmar}, year={2009}, pages={1013–1029} }","ama":"Gharibian S, Kampermann H, Bru{\\ss} D. On global effects caused by locally noneffective unitary operations. <i>Quantum Information &#38; Computation</i>. 2009;9(11):1013-1029.","mla":"Gharibian, Sevag, et al. “On Global Effects Caused by Locally Noneffective Unitary Operations.” <i>Quantum Information &#38; Computation</i>, vol. 9, no. 11, 2009, pp. 1013–29.","chicago":"Gharibian, Sevag, Hermann Kampermann, and Dagmar Bru{\\ss}. “On Global Effects Caused by Locally Noneffective Unitary Operations.” <i>Quantum Information &#38; Computation</i> 9, no. 11 (2009): 1013–29.","short":"S. Gharibian, H. Kampermann, D. Bru{\\ss}, Quantum Information &#38; Computation 9 (2009) 1013–1029.","ieee":"S. Gharibian, H. Kampermann, and D. Bru{\\ss}, “On global effects caused by locally noneffective unitary operations,” <i>Quantum Information &#38; Computation</i>, vol. 9, no. 11, pp. 1013–1029, 2009.","apa":"Gharibian, S., Kampermann, H., &#38; Bru{\\ss}, D. (2009). On global effects caused by locally noneffective unitary operations. <i>Quantum Information &#38; Computation</i>, <i>9</i>(11), 1013–1029."},"oa":"1","external_id":{"arxiv":["0809.4469"]},"article_type":"original","intvolume":"         9","publication_status":"published","date_updated":"2023-02-28T11:04:50Z","author":[{"full_name":"Gharibian, Sevag","last_name":"Gharibian","first_name":"Sevag","orcid":"0000-0002-9992-3379","id":"71541"},{"full_name":"Kampermann, Hermann","last_name":"Kampermann","first_name":"Hermann"},{"last_name":"Bru{\\ss}","first_name":"Dagmar","full_name":"Bru{\\ss}, Dagmar"}],"year":"2009","title":"On global effects caused by locally noneffective unitary operations","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://arxiv.org/abs/0809.4469","open_access":"1"}],"extern":"1","abstract":[{"text":"Given a bipartite quantum state rho with subsystems A and B of arbitrary dimensions, we study the entanglement detecting capabilities of locally noneffective, or cyclic, unitary operations [L. B. Fu, Europhys. Lett., vol. 75, pp. 1-7, 2006]. Local cyclic unitaries have the special property that they leave their target subsystem invariant. We investigate the distance between rho and the global state after local application of such unitaries as a possible indicator of entanglement. To this end, we derive and discuss closed formulae for the maximal such distance achievable for three cases of interest: (pseudo)pure quantum states, Werner states, and two-qubit states. What makes this criterion interesting, as we show here, is that it surprisingly displays behavior similar to recent anomalies observed for non-locality measures in higher dimensions, as well as demonstrates an equivalence to the CHSH inequality for certain classes of two-qubit states. Yet, despite these similarities, the criterion is not itself a non-locality measure. We also consider entanglement detection in bound entangled states.","lang":"eng"}],"publication":"Quantum Information & Computation","issue":"11","department":[{"_id":"623"},{"_id":"7"}],"type":"journal_article","date_created":"2019-03-01T12:12:13Z"},{"status":"public","_id":"8181","publisher":"American Physical Society (APS)","user_id":"71541","volume":79,"citation":{"chicago":"Datta, Animesh, and Sevag Gharibian. “Signatures of Nonclassicality in Mixed-State Quantum Computation.” <i>Physical Review A</i> 79, no. 4 (2009). <a href=\"https://doi.org/10.1103/physreva.79.042325\">https://doi.org/10.1103/physreva.79.042325</a>.","short":"A. Datta, S. Gharibian, Physical Review A 79 (2009).","ieee":"A. Datta and S. Gharibian, “Signatures of nonclassicality in mixed-state quantum computation,” <i>Physical Review A</i>, vol. 79, no. 4, 2009, doi: <a href=\"https://doi.org/10.1103/physreva.79.042325\">10.1103/physreva.79.042325</a>.","apa":"Datta, A., &#38; Gharibian, S. (2009). Signatures of nonclassicality in mixed-state quantum computation. <i>Physical Review A</i>, <i>79</i>(4). <a href=\"https://doi.org/10.1103/physreva.79.042325\">https://doi.org/10.1103/physreva.79.042325</a>","bibtex":"@article{Datta_Gharibian_2009, title={Signatures of nonclassicality in mixed-state quantum computation}, volume={79}, DOI={<a href=\"https://doi.org/10.1103/physreva.79.042325\">10.1103/physreva.79.042325</a>}, number={4}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Datta, Animesh and Gharibian, Sevag}, year={2009} }","ama":"Datta A, Gharibian S. Signatures of nonclassicality in mixed-state quantum computation. <i>Physical Review A</i>. 2009;79(4). doi:<a href=\"https://doi.org/10.1103/physreva.79.042325\">10.1103/physreva.79.042325</a>","mla":"Datta, Animesh, and Sevag Gharibian. “Signatures of Nonclassicality in Mixed-State Quantum Computation.” <i>Physical Review A</i>, vol. 79, no. 4, American Physical Society (APS), 2009, doi:<a href=\"https://doi.org/10.1103/physreva.79.042325\">10.1103/physreva.79.042325</a>."},"external_id":{"arxiv":["0811.4003"]},"oa":"1","year":"2009","title":"Signatures of nonclassicality in mixed-state quantum computation","author":[{"last_name":"Datta","first_name":"Animesh","full_name":"Datta, Animesh"},{"id":"71541","full_name":"Gharibian, Sevag","first_name":"Sevag","orcid":"0000-0002-9992-3379","last_name":"Gharibian"}],"publication_identifier":{"issn":["1050-2947","1094-1622"]},"date_updated":"2023-02-28T11:05:02Z","publication_status":"published","intvolume":"        79","article_type":"original","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/0811.4003"}],"language":[{"iso":"eng"}],"doi":"10.1103/physreva.79.042325","issue":"4","publication":"Physical Review A","abstract":[{"text":"We investigate signatures of non-classicality in quantum states, in particular, those involved in the DQC1 model of mixed-state quantum computation [Phys. Rev. Lett. 81, 5672 (1998)]. To do so, we consider two known non-classicality criteria. The first quantifies disturbance of a quantum state under locally noneffective unitary operations (LNU), which are local unitaries acting invariantly on a subsystem. The second quantifies measurement induced disturbance (MID) in the eigenbasis of the reduced density matrices. We study the role of both figures of non-classicality in the exponential speedup of the DQC1 model and compare them vis-a-vis the interpretation provided in terms of quantum discord. In particular, we prove that a non-zero quantum discord implies a non-zero shift under LNUs. We also use the MID measure to study the locking of classical correlations [Phys. Rev. Lett. 92, 067902 (2004)] using two mutually unbiased bases (MUB). We find the MID measure to exactly correspond to the number of locked bits of correlation. For three or more MUBs, it predicts the possibility of superior locking effects.","lang":"eng"}],"extern":"1","date_created":"2019-03-01T12:12:58Z","type":"journal_article","department":[{"_id":"623"},{"_id":"7"}]},{"user_id":"26263","volume":88,"publisher":"American Physical Society (APS)","_id":"37680","status":"public","citation":{"mla":"Silberhorn, Ch., et al. “Quantum Key Distribution with Bright Entangled Beams.” <i>Physical Review Letters</i>, vol. 88, no. 16, 167902, American Physical Society (APS), 2002, doi:<a href=\"https://doi.org/10.1103/physrevlett.88.167902\">10.1103/physrevlett.88.167902</a>.","ama":"Silberhorn Ch, Korolkova N, Leuchs G. Quantum Key Distribution with Bright Entangled Beams. <i>Physical Review Letters</i>. 2002;88(16). doi:<a href=\"https://doi.org/10.1103/physrevlett.88.167902\">10.1103/physrevlett.88.167902</a>","bibtex":"@article{Silberhorn_Korolkova_Leuchs_2002, title={Quantum Key Distribution with Bright Entangled Beams}, volume={88}, DOI={<a href=\"https://doi.org/10.1103/physrevlett.88.167902\">10.1103/physrevlett.88.167902</a>}, number={16167902}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Silberhorn, Ch. and Korolkova, N. and Leuchs, G.}, year={2002} }","apa":"Silberhorn, Ch., Korolkova, N., &#38; Leuchs, G. (2002). Quantum Key Distribution with Bright Entangled Beams. <i>Physical Review Letters</i>, <i>88</i>(16), Article 167902. <a href=\"https://doi.org/10.1103/physrevlett.88.167902\">https://doi.org/10.1103/physrevlett.88.167902</a>","ieee":"Ch. Silberhorn, N. Korolkova, and G. Leuchs, “Quantum Key Distribution with Bright Entangled Beams,” <i>Physical Review Letters</i>, vol. 88, no. 16, Art. no. 167902, 2002, doi: <a href=\"https://doi.org/10.1103/physrevlett.88.167902\">10.1103/physrevlett.88.167902</a>.","chicago":"Silberhorn, Ch., N. Korolkova, and G. Leuchs. “Quantum Key Distribution with Bright Entangled Beams.” <i>Physical Review Letters</i> 88, no. 16 (2002). <a href=\"https://doi.org/10.1103/physrevlett.88.167902\">https://doi.org/10.1103/physrevlett.88.167902</a>.","short":"Ch. Silberhorn, N. Korolkova, G. Leuchs, Physical Review Letters 88 (2002)."},"doi":"10.1103/physrevlett.88.167902","article_number":"167902","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2023-01-30T13:06:06Z","intvolume":"        88","year":"2002","title":"Quantum Key Distribution with Bright Entangled Beams","publication_identifier":{"issn":["0031-9007","1079-7114"]},"author":[{"full_name":"Silberhorn, Ch.","last_name":"Silberhorn","first_name":"Ch."},{"first_name":"N.","last_name":"Korolkova","full_name":"Korolkova, N."},{"full_name":"Leuchs, G.","last_name":"Leuchs","first_name":"G."}],"type":"journal_article","keyword":["General Physics and Astronomy"],"department":[{"_id":"288"},{"_id":"15"},{"_id":"623"},{"_id":"230"}],"date_created":"2023-01-20T09:44:56Z","publication":"Physical Review Letters","issue":"16"}]