Results 51 to 60 of about 630 (239)
Analytic Expression of Quantum Discords in Werner States under LQCC
Entropy, 2020 In this paper, quantum discords in a special kind of states, i.e., Werner states by local quantum operations and classical communication (LQCC) protocols (WLQCC states), are studied.
Chuanmei Xie +3 more
doaj +1 more source
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
doaj +1 more source
Quantum Discord Cannot Be Shared
Physical Review Letters, 2013 5 pages, 3 ...
Streltsov, Alexander, Zurek, Wojciech H.
openaire +4 more sources
Quantum discord: ‘discord’ between the whole and its constituent [PDF]
Journal of Physics A: Mathematical and Theoretical, 2012 Quantum discord, a measure of quantum correlation beyond entanglement, is initially defined as the discord between two classically equivalent while quantum discordant definitions of mutual information. In this paper, we report some new interpretations of discord which rely on the differences between measurement induced effects on the local measured ...
Ren, X. -J., Fan, H.
openaire +2 more sources
Effects of phase shift on bipartite and multipartite correlations of a spin chain under dephasing
Open Physics, 2015 We investigate the effects of phase shift on entanglement, quantum discord, geometric discord, and spinsqueezing of a Heisenberg chain under dephasing. An analytical solution of the present model is obtained.
Chen Ai-Xi, Zhang Jian-Song
doaj +1 more source
Simultaneous sudden change in the exact values of geometric quantum discord and measurement induced nonlocality [PDF]
Iranian Journal of Astronomy and Astrophysics, 2018 Recent studies show that two completely distinct fields as quantum information and string theory realization can be related and share some of the same properties.
Samira Nazifkar, Hakimeh Jaghouri
doaj +1 more source
Quantum Discord and the Power of One Qubit [PDF]
Physical Review Letters, 2008 4 Pages, 1 ...
Datta, A, Shaji, A, Caves, C
openaire +3 more sources
Quantum discord and entanglement in grover search algorithm
Open Physics, 2016 Imperfections and noise in realistic quantum computers may seriously affect the accuracy of quantum algorithms. In this article we explore the impact of static imperfections on quantum entanglement as well as non-entangled quantum correlations in Grover ...
Ye Bin +3 more
doaj +1 more source
Dynamics of quantum discord of two coupled spin-1/2’s subjected to time-dependent magnetic fields
Results in Physics, 2019 We describe the dynamics of quantum discord of two interacting spin-1/2’s subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two Bell ...
Roberto Grimaudo +4 more
doaj +1 more source
Entanglement Distribution and Quantum Discord [PDF]
, 2017 Establishing entanglement between distant parties is one of the most important problems of quantum technology, since long-distance entanglement is an essential part of such fundamental tasks as quantum cryptography or quantum teleportation. In this lecture we review basic properties of entanglement and quantum discord, and discuss recent results on ...
Streltsov, Alexander +2 more
openaire +2 more sources