Results 91 to 100 of about 13,882 (271)
Geometric quantum discord with Bures distance
New Journal of Physics, 2013 We define a new measure of quantum correlations in bipartite quantum systems given by the Bures distance of the system state to the set of classical states with respect to one subsystem, that is, to the states with zero quantum discord.
D Spehner, M Orszag
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Quantum discord and Fisher information for two-qubit system in the presence of thermal fields
AIP Advances, 2023 We consider a double Jaynes–Cummings model for a system of two atoms that interact with a radiation field defined in a thermal spin state. We examine the impact of the parameters of the quantum model on the temporal evolution of quantum discord, quantum ...
M. Algarni, S. Abdel-Khalek, K. Berrada
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Quantum correlations in the collective spin systems
, 2012 Quantum and classical pairwise correlations in two typical collective spin systems (i.e., the Dicke model and the Lipkin-Meshkov-Glick model) are discussed.
Chen Wang +6 more
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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 ...
Heng Fan, Xi-Jun Ren
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Dispersion of First Sound in a Weakly Interacting Ultracold Fermi Liquid
Annalen der Physik, EarlyView.The weak‐interaction, low‐temperature region of the phase diagram of a Fermi gas the so‐called Fermi liquid regime, which has been somewhat overlooked in ultracold gases‐is investigated. Precise and measurable predictions are presented for the viscosity and dispersion of first sound to leading order in the scattering length.
Thomas Repplinger +4 more
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Maximizing quantum discord from interference in multi-port fiber beamsplitters
npj Quantum Information, 2021 Fourth-order interference is an information processing primitive for photonic quantum technologies, as it forms the basis of photonic controlled-logic gates, entangling measurements, and can be used to produce quantum correlations.
J. Cariñe +3 more
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Quantum Jumps in Amplitude Bistability: Tracking a Coherent and Invertible State Localization
Annalen der Physik, EarlyView.A notable asymmetry is shown to characterize the bistable switching between macroscopic metastable states of light in the strong‐coupling limit of radiation–matter interaction. Transitions from the vacuum to a highly excited state correlate with a highly bunched sequence of emitted photons, while a downward switch to the vacuum involves a coherent ...
Th. K. Mavrogordatos
wiley +1 more source
Branching States as The Emergent Structure of a Quantum Universe [PDF]
QuantumQuantum Darwinism builds on decoherence theory to explain the emergence of classical behavior in a fundamentally quantum universe. Within this framework we prove two crucial insights about the emergence of classical phenomenology, centered around quantum
Akram Touil +3 more
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Super quantum discord for X-type states
, 2014 Weak measurement is a new way to manipulate and control quantum systems. Different from projection measurement, weak measurement only makes a small change in status.
Fei, Shaoming +4 more
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Quantum Games and Quantum Discord
, 2010 We quantize prisoners dilemma and chicken game by our generalized quantization scheme to explore the role of quantum discord in quantum games. In order to establish this connection we use Werner-like state as an initial state of the game. In this quantization scheme measurement can be performed in entangled as well as in product basis.
Nawaz, Ahmad, Toor, A. H.
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