@inbook{36902, author = {{Weber, Jutta}}, booktitle = {{Handbuch Wissenschaftssoziologie}}, editor = {{Maasen, Sabine and Kaiser, Mario and Reinhart, Martin and Sutter, Barbara}}, pages = {{409--416}}, publisher = {{Verlag für Sozialwissenschaften}}, title = {{{Neue Episteme: Die biokybernetische Konfiguration der Technowissenschaftskultur}}}, year = {{2012}}, } @misc{37515, author = {{Weber, Jutta}}, booktitle = {{Handbuch Wissenschaftssoziologie}}, editor = {{Maasen, Sabine and Kaiser, Mario and Reinhart, Martin and Sutter, Barbara}}, pages = {{409--416}}, publisher = {{Verlag für Sozialwissenschaften}}, title = {{{Neue Episteme: Die biokybernetische Konfiguration der Technowissenschaftskultur}}}, year = {{2012}}, } @book{34534, abstract = {{Computer gelten als prägende Faktoren unserer Gesellschaft, ohne dass die ihnen zugesprochene Gestaltungsmacht systematisch hinterfragt würde. Gemeinhin werden sie als Rechenmaschine, Medium oder Notationssystem adressiert. Unklar bleibt, welcher Status Computern als Ding überhaupt zukommt. Mit ihrer kritischen Neulektüre von Vilém Flusser und Mark Weiser legt Suzana Alpsancar zwei symptomatische Computerkonzepte im Diskurs des Digitalen frei. Sie zeigt, dass eine Reflexion der Gestaltungsmacht von Computern neben typischen Gebrauchsweisen gerade auch auf ihre potenzielle Widerständigkeit als Dinge abheben muss, um ihre Medialität angemessen erfassen zu können.}}, author = {{Alpsancar, Suzana}}, isbn = {{9783837619515}}, issn = {{2702-900X}}, pages = {{322}}, publisher = {{transcript Verlag}}, title = {{{Das Ding namens Computer. Eine kritische Neulektüre von Vilém Flusser und Mark Weiser}}}, doi = {{10.14361/transcript.9783839419519}}, year = {{2012}}, } @inproceedings{8169, abstract = {{The polynomial hierarchy plays a central role in classical complexity theory. Here, we define a quantum generalization of the polynomial hierarchy, and initiate its study. We show that not only are there natural complete problems for the second level of this quantum hierarchy, but that these problems are in fact hard to approximate. Our work thus yields the first known hardness of approximation results for a quantum complexity class. Using these techniques, we also obtain hardness of approximation for the class QCMA. Our approach is based on the use of dispersers, and is inspired by the classical results of Umans regarding hardness of approximation for the second level of the classical polynomial hierarchy (Umans 1999). We close by showing that a variant of the local Hamiltonian problem with hybrid classical-quantum ground states is complete for the second level of our quantum hierarchy.}}, author = {{Gharibian, Sevag and Kempe, Julia}}, booktitle = {{International Colloquium on Automata, Languages, and Programming (ICALP 2012)}}, editor = {{Czumaj, Artur and Mehlhorn, Kurt and Pitts, Andrew and Wattenhofer, Roger}}, isbn = {{978-3-642-31594-7}}, location = {{Warwick, UK}}, pages = {{387--398}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Hardness of Approximation for Quantum Problems}}}, doi = {{10.1007/978-3-642-31594-7_33}}, year = {{2012}}, } @article{8175, abstract = {{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 (where QMA stands for Quantum Merlin Arthur) and initiate its study. We present two main results. The first shows that a nontrivial 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, Karger, and Karpinski [J. Comput. System Sci., 58 (1999), p. 193] to the quantum setting and might be of independent interest.}}, author = {{Gharibian, Sevag and Kempe, Julia}}, issn = {{0097-5397}}, journal = {{SIAM Journal on Computing}}, number = {{4}}, pages = {{1028--1050}}, publisher = {{Society for Industrial & Applied Mathematics (SIAM)}}, title = {{{Approximation Algorithms for QMA-Complete Problems}}}, doi = {{10.1137/110842272}}, volume = {{41}}, year = {{2012}}, } @article{8174, abstract = {{We propose a measure of non-classical correlations in bipartite quantum states based on local unitary operations. We prove the measure is non-zero if and only if the quantum discord is non-zero; this is achieved via a new characterization of zero discord states in terms of the state's correlation matrix. Moreover, our scheme can be extended to ensure the same relationship holds even with a generalized version of quantum discord in which higher-rank projective measurements are allowed. We next derive a closed form expression for our scheme in the cases of Werner states and (2 x N)-dimensional systems. The latter reveals that for (2 x N)-dimensional states, our measure reduces to the geometric discord [Dakic et al., PRL 105, 2010]. A connection to the CHSH inequality is shown. We close with a characterization of all maximally non-classical, yet separable, (2 x N)-dimensional states of rank at most two (with respect to our measure).}}, author = {{Gharibian, Sevag}}, journal = {{Physical Review A}}, pages = {{042106}}, publisher = {{American Physical Society}}, title = {{{Quantifying nonclassicality with local unitary operations}}}, doi = {{10.1103/PhysRevA.86.042106}}, volume = {{86}}, year = {{2012}}, } @article{41441, author = {{Fuchs, Christian and Mosco, Vincent}}, journal = {{tripleC – Open Access Journal for a Global Sustainable Information Society}}, number = {{2}}, pages = {{127--632}}, title = {{{Marx is Back – The Importance of Marxist Theory and Research for Critical Communication Studies Today}}}, doi = {{https://doi.org/10.31269/triplec.v10i2.427}}, volume = {{10}}, year = {{2012}}, } @article{41448, author = {{Fuchs, Christian and Bolin, Göran}}, journal = {{tripleC – Open Access Journal for a Global Sustainable Information Society}}, number = {{1}}, pages = {{30--91}}, title = {{{Critical Theory and Political Economy of the Internet @ Nordmedia 2011}}}, volume = {{10}}, year = {{2012}}, } @article{41604, author = {{Fuchs, Christian}}, journal = {{tripleC – Journal for a Global Sustainable Information Society}}, number = {{2}}, pages = {{692--740}}, title = {{{Dallas Smythe Today – The Audience Commodity, the Digital Labour Debate, Marxist Political Economy and Critical Theory. Prolegomena to a Digital Labour Theory of Value}}}, doi = {{https://doi.org/10.31269/triplec.v10i2.443}}, volume = {{10}}, year = {{2012}}, } @article{41619, author = {{Fuchs, Christian and Bolin, Göran}}, journal = {{tripleC – Journal for a Global Sustainable Information Society}}, number = {{1}}, pages = {{30--32}}, title = {{{Introduction to the Special section “Critical theory and political economy of the Internet (Nordmedia 2011)“}}}, doi = {{https://doi.org/10.31269/triplec.v10i1.339}}, volume = {{10}}, year = {{2012}}, } @article{42606, author = {{Fuchs, Christian}}, journal = {{tripleC - Journal for a Global Sustainable Information Society}}, number = {{1}}, pages = {{114--121 }}, title = {{{New Marxian Times! Reflections on the 4th ICTs and Society Conference "Critique, Democracy and Philosophy in 21st Century Information Society. Towards Critical Theories of Social Media"}}}, doi = {{https://doi.org/10.31269/triplec.v10i1.411}}, volume = {{10}}, year = {{2012}}, } @article{41610, author = {{Fuchs, Christian and Mosco, Vincent}}, journal = {{tripleC – Open Access Journal for a Global Sustainable Information Society}}, number = {{2}}, pages = {{127--140}}, title = {{{Introduction: Marx is Back – The Importance of Marxist Theory and Research for Critical Communication Studies Today}}}, doi = {{https://doi.org/10.31269/triplec.v10i2.421}}, volume = {{10}}, year = {{2012}}, } @article{41611, author = {{Fuchs, Christian}}, journal = {{tripleC – Open Access Journal for a Global Sustainable Information Society}}, number = {{2}}, pages = {{392--412}}, title = {{{Towards Marxian Internet Studies}}}, doi = {{https://doi.org/10.31269/triplec.v10i2.277}}, volume = {{10}}, year = {{2012}}, } @article{41617, author = {{Fuchs, Christian}}, journal = {{tripleC – Journal for a Global Sustainable Information Society}}, number = {{1}}, pages = {{42--48}}, title = {{{Google Capitalism}}}, doi = {{https://doi.org/10.31269/triplec.v10i1.304}}, volume = {{10}}, year = {{2012}}, } @article{41685, author = {{Fuchs, Christian}}, journal = {{Nómadas}}, pages = {{27--41}}, title = {{{Una contribución la crítica de la economía política del capitalismo informacional transnacional}}}, volume = {{36}}, year = {{2012}}, } @article{42603, author = {{Fuchs, Christian}}, journal = {{tripleC - Open Access Journal for a Global Sustainable Information Society}}, number = {{2}}, pages = {{775--797}}, title = {{{Some Reflections on Manuel Castells’ Book “Networks of Outrage and Hope. Social Movements in the Internet Age“}}}, doi = {{https://doi.org/10.31269/triplec.v10i2.459}}, volume = {{10}}, year = {{2012}}, } @article{42604, author = {{Fuchs, Christian}}, journal = {{tripleC - Open Access Journal for a Global Sustainable Information Society}}, number = {{2}}, pages = {{633--645}}, title = {{{With or Without Marx? With or Without Capitalism? A Rejoinder to Adam Arvidsson and Eleanor Colleoni}}}, doi = {{https://doi.org/10.31269/triplec.v10i2.434}}, volume = {{10}}, year = {{2012}}, } @misc{42605, author = {{Fuchs, Christian}}, booktitle = {{Occupy News Network}}, title = {{{Why social media research matters for Occupy}}}, year = {{2012}}, } @article{3974, abstract = {{We study the quantum properties and statistics of photons emitted by a quantum-dot biexciton inside a cavity. In the biexciton-exciton cascade, fine-structure splitting between exciton levels degrades polarization-entanglement for the emitted pair of photons. However, here we show that the polarization-entanglement can be preserved in such a system through simultaneous emission of two degenerate photons into cavity modes tuned to half the biexciton energy. Based on detailed theoretical calculations for realistic quantum-dot and cavity parameters, we quantify the degree of achievable entanglement.}}, author = {{Schumacher, Stefan and Förstner, Jens and Zrenner, Artur and Florian, Matthias and Gies, Christopher and Gartner, Paul and Jahnke, Frank}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{tet_topic_qd}}, number = {{5}}, pages = {{5335--5342}}, publisher = {{OSA}}, title = {{{Cavity-assisted emission of polarization-entangled photons from biexcitons in quantum dots with fine-structure splitting}}}, doi = {{10.1364/oe.20.005335}}, volume = {{20}}, year = {{2012}}, } @article{3970, abstract = {{Optical experiments on second-harmonic generation from split-ring-resonator square arrays show a nonmonotonic dependence of the conversion efficiency on the lattice constant. This finding is interpreted in terms of a competition between dilution effects and linewidth or near-field changes due to interactions among the individual elements in the array.}}, author = {{Linden, S. and Niesler, F. B. P. and Förstner, Jens and Grynko, Yevgen and Meier, Torsten and Wegener, M.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{tet_topic_shg, tet_topic_meta}}, number = {{1}}, publisher = {{American Physical Society (APS)}}, title = {{{Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays}}}, doi = {{10.1103/physrevlett.109.015502}}, volume = {{109}}, year = {{2012}}, }