Entanglement of purification for multipartite states and its holographic dual
Journal of High Energy Physics, 2018 We introduce a new information-theoretic measure of multipartite correlations Δ P , by generalizing the entanglement of purification to multipartite states.
Koji Umemoto, Yang Zhou
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Assessing the performance of quantum repeaters for all phase-insensitive Gaussian bosonic channels
New Journal of Physics, 2016 One of the most sought-after goals in experimental quantum communication is the implementation of a quantum repeater. The performance of quantum repeaters can be assessed by comparing the attained rate with the quantum and private capacity of direct ...
K Goodenough, D Elkouss, S Wehner
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Computing quantum discord is NP-complete
New Journal of Physics, 2014 We study the computational complexity of quantum discord (a measure of quantum correlation beyond entanglement), and prove that computing quantum discord is NP-complete.
Yichen Huang
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Entropy for gravitational Chern-Simons terms by squashed cone method [PDF]
Journal of High Energy Physics, 2016 In this paper we investigate the entropy of gravitational Chern-Simons terms for the horizon with non-vanishing extrinsic curvatures, or the holographic entanglement entropy for arbitrary entangling surface. In 3D there is no anomaly of entropy.
Wu-Zhong Guo, R. Miao
semanticscholar +2 more sources
Observables in the Guarino-Jafferis-Varela/CS-SYM duality
Journal of High Energy Physics, 2017 We study various semiclassical observables in the duality proposed by Guarino, Jafferis and Varela, between a warped AdS 4× squashed S 6 gravitational solution and a 3 dimensional N = 2 S Y M − C S k $$ \mathcal{N}=2\ \mathrm{S}\mathrm{Y}\mathrm{M ...
Thiago R. Araujo, Horatiu Nastase
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An introduction to entanglement measures [PDF]
Quantum information & computation, 2005 We review the theory of entanglement measures, concentrating mostly on the finite dimensional two-party case. Topics covered include: single-copy and asymptotic entanglement manipulation; the entanglement of formation; the entanglement cost; the ...
M. Plenio, S. Virmani
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Strict entanglement monotonicity under local operations and classical communication [PDF]
Physical Review A, 2019 Entanglement monotone is defined as a convex measure of entanglement that does not increase on average under local operations and classical communication (LOCC).
Yu Guo
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Heralded channel Holevo superadditivity bounds from entanglement monogamy [PDF]
Journal of Mathematics and Physics, 2017 We show that for a particular class of quantum channels, which we call heralded channels, monogamy of squashed entanglement limits the superadditivity of Holevo capacity.
Li Gao, M. Junge, Nicholas Laracuente
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Entanglement properties of a measurement-based entanglement distillation experiment [PDF]
Physical Review A, 2018 Measures of entanglement can be employed for the analysis of numerous quantum information protocols. Due to computational convenience, logarithmic negativity is often the choice in the case of continuous-variable systems.
Hao Jeng +7 more
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Bounds on Entanglement Distillation and Secret Key Agreement for Quantum Broadcast Channels [PDF]
IEEE Transactions on Information Theory, 2015 The squashed entanglement of a quantum channel is an additive function of quantum channels, which finds application as an upper bound on the rate at which secret key and entanglement can be generated when using a quantum channel a large number of times ...
K. Seshadreesan, M. Takeoka, M. Wilde
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