We report a combined experiment-theory study on low energy vibrational modes in fluorescence spectra of perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTCDA) molecules.
}}, author = {{Paulheim, A. and Marquardt, C. and Sokolowski, M. and Hochheim, M. and Bredow, T. and Aldahhak, Hazem and Rauls, E. and Schmidt, Wolf Gero}}, issn = {{1463-9076}}, journal = {{Physical Chemistry Chemical Physics}}, pages = {{32891--32902}}, title = {{{Surface induced vibrational modes in the fluorescence spectra of PTCDA adsorbed on the KCl(100) and NaCl(100) surfaces}}}, doi = {{10.1039/c6cp05661j}}, volume = {{18}}, year = {{2016}}, } @article{13816, author = {{Yeom, Han Woong and Oh, Deok Mahn and Wippermann, Stefan and Schmidt, Wolf Gero}}, issn = {{1936-0851}}, journal = {{ACS Nano}}, pages = {{810--814}}, title = {{{Impurity-Mediated Early Condensation of a Charge Density Wave in an Atomic Wire Array}}}, doi = {{10.1021/acsnano.5b05925}}, volume = {{10}}, year = {{2016}}, } @article{13921, author = {{Opatrný, Tomáš and Saberi, Hamed and Brion, Etienne and Mølmer, Klaus}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, number = {{2}}, title = {{{Counterdiabatic driving in spin squeezing and Dicke-state preparation}}}, doi = {{10.1103/physreva.93.023815}}, volume = {{93}}, year = {{2016}}, } @article{13913, author = {{Liu, Hong}}, issn = {{1434-6028}}, journal = {{The European Physical Journal B}}, pages = {{230}}, title = {{{Influence of strong screening effect on the perpendicular- polarized linear excitonic absorption spectra of semiconducting carbon nanotubes}}}, doi = {{10.1140/epjb/e2016-70476-8}}, volume = {{89}}, year = {{2016}}, } @article{13914, author = {{Sanz, M. and Egusquiza, I. L. and Di Candia, R. and Saberi, H. and Lamata, L. and Solano, E.}}, issn = {{2045-2322}}, journal = {{Scientific Reports}}, pages = {{30188}}, title = {{{Entanglement classification with matrix product states}}}, doi = {{10.1038/srep30188}}, volume = {{6}}, year = {{2016}}, } @article{40392, author = {{Lemieux, Samuel and Manceau, Mathieu and Sharapova, Polina and Tikhonova, Olga V. and Boyd, Robert W. and Leuchs, Gerd and Chekhova, Maria V.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{General Physics and Astronomy}}, number = {{18}}, publisher = {{American Physical Society (APS)}}, title = {{{Engineering the Frequency Spectrum of Bright Squeezed Vacuum via Group Velocity Dispersion in an SU(1,1) Interferometer}}}, doi = {{10.1103/physrevlett.117.183601}}, volume = {{117}}, year = {{2016}}, } @article{40393, author = {{Cavanna, Andrea and Just, Felix and Sharapova, Polina and Taheri, Michael and Leuchs, Gerd and Chekhova, Maria V.}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{3}}, publisher = {{The Optical Society}}, title = {{{Tunable optical parametric generator based on the pump spatial walk-off}}}, doi = {{10.1364/ol.41.000646}}, volume = {{41}}, year = {{2016}}, } @article{13919, author = {{Sternemann, E. and Jostmeier, T. and Ruppert, C. and Thunich, S. and Duc, H. T. and Podzimski, R. and Meier, Torsten and Betz, M.}}, issn = {{0946-2171}}, journal = {{Applied Physics B}}, title = {{{Quantum interference control of electrical currents in GaAs microstructures: physics and spectroscopic applications}}}, doi = {{10.1007/s00340-015-6310-y}}, volume = {{122}}, year = {{2016}}, } @article{4246, abstract = {{Spins in semiconductor quantum dots have been considered as prospective quantum bit excitations. Their coupling to the crystal environment manifests itself in a limitation of the spin coherence times to the microsecond range, both for electron and hole spins. This rather short-lived coherence compared to atomic states asks for manipulations on timescales as short as possible. Due to the huge dipole moment for transitions between the valence and conduction band, pulsed laser systems offer the possibility to perform manipulations within picoseconds or even faster. Here, we report on results that show the potential of optical spin manipulations with currently available pulsed laser systems. Using picosecond laser pulses, we demonstrate optically induced spin rotations of electron and hole spins. We further realize the optical decoupling of the hole spins from the nuclear surrounding at the nanosecond timescales and demonstrate an all-optical spin tomography for interacting electron spin sub-ensembles.}}, author = {{Varwig, S. and Evers, E. and Greilich, A. and Yakovlev, D. R. and Reuter, Dirk and Wieck, A. D. and Meier, Torsten and Zrenner, Artur and Bayer, M.}}, issn = {{0946-2171}}, journal = {{Applied Physics B}}, keywords = {{Spin Polarization, Pump Pulse, Trion, Spin Component, Coherence Time}}, number = {{1}}, publisher = {{Springer Nature}}, title = {{{Advanced optical manipulation of carrier spins in (In,Ga)As quantum dots}}}, doi = {{10.1007/s00340-015-6274-y}}, volume = {{122}}, year = {{2016}}, } @article{43194, abstract = {{For incident light polarized perpendicular to the tube axis the multi-band semiconductor Bloch equations (MB-SBEs) that involve various screened interband Coulomb interactions (ICIs) are derived. The calculated E 12 peak is very close to the longitudinal excitonic peak E 22. Compared with the previous theoretical peak positions, the blue-shift of the peak in our results is about 0.5 eV. Then, subsequent detailed analyses show that the screening effect on the diagonal ICIs (D-ICIs) plays a key role in this big blue-shift. The valley-degenerate transverse pair excitations holding the same selection rule further enhance the screening effect on D-ICIs. Specially at q = 0 the dielectric function acting on the D-ICIs enhances two times. In our calculation the strong screening effect contributes 90% of the big blue-shift, while the non-diagonal ICIs (ND-ICIs) contribute to 10% of the blue-shift.}}, author = {{Meier, Torsten and Liu, Hong}}, journal = {{The European Physical Journal B}}, title = {{{Influence of strong screening effect on the perpendicular polarized linear excitonic absorption spectra of semiconducting carbon nanotubes}}}, doi = {{10.1140/epjb/e2016-70476-8}}, volume = {{89}}, year = {{2016}}, } @article{43196, abstract = {{A method is presented to transfer a system of two-level atoms from a spin coherent state to a maximally spin squeezed Dicke state, relevant for quantum metrology and quantum information processing. The initial state is the ground state of an initial linear Hamiltonian that is gradually turned into a final quadratic Hamiltonian whose ground state is the selected Dicke state. We use compensating operators to suppress diabatic transitions to unwanted states that would occur if the change were not slow. We discuss the possibilities of constructing the compensating operators by sequential application of quadratic Hamiltonians available in experiments.}}, author = {{Meier, Torsten and Opatrný, T. and Saberi, H. and Brion, E. and Mølmer, K.}}, journal = {{Physical Review A}}, number = {{2}}, title = {{{Counterdiabatic driving in spin squeezing and Dicke-state preparation}}}, doi = {{10.1103/PhysRevA.93.023815}}, volume = {{93}}, year = {{2016}}, } @article{43195, abstract = {{We propose an entanglement classification for symmetric quantum states based on their diagonal matrix-product-state (MPS) representation. The proposed classification, which preserves the stochastic local operation assisted with classical communication (SLOCC) criterion, relates entanglement families to the interaction length of Hamiltonians. In this manner, we establish a connection between entanglement classification and condensed matter models from a quantum information perspective. Moreover, we introduce a scalable nesting property for the proposed entanglement classification, in which the families for N parties carry over to the N + 1 case. Finally, using techniques from algebraic geometry, we prove that the minimal nontrivial interaction length n for any symmetric state is bounded by .}}, author = {{Sanz, M. and Egusquiza, I.L. and Candia, R. Di and Saberi, H. and Lamata, L. and Solano, E.}}, journal = {{Scientific Reports}}, title = {{{Entanglement classification with matrix product states}}}, doi = {{10.1038/srep30188}}, volume = {{6}}, year = {{2016}}, } @article{64898, abstract = {{