Distribution and Generation of Quantum Coherence for Gaussian States in de Sitter Space
Sign Up to like & getrecommendations! Published in 2021 at "Annalen der Physik"
DOI: 10.1002/andp.202000536
Abstract: We study the distribution and generation of quantum coherence for two-mode and multi-mode Gaussian states in de Sitter space. It is found that the quantum coherence is redistributed among the mode in different open charts… read more here.
Keywords: quantum coherence; space; coherence; distribution generation ... See more keywords
Enhancement of the Quantum Coherence in a Hierarchical Environment System by Weak Measurement and Weak Measurement Reversal
Sign Up to like & getrecommendations! Published in 2023 at "Annalen der Physik"
DOI: 10.1002/andp.202300027
Abstract: The quantum coherence of a two‐qubit system in which each qubit is coupled to its own hierarchical environment is studied. The effect of the hierarchical environment is explored in order to improve the coherence effectively.… read more here.
Keywords: weak measurement; coherence; hierarchical environment; quantum coherence ... See more keywords
Optimal Protection of Quantum Coherence in Noisy Environment
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DOI: 10.1007/s10773-016-3192-7
Abstract: In this paper, we analyse the quantum coherence dynamics of a single qubit locally interacting with a zero-temperature reservoir. We compare the behaviors of quantum coherence in Markovian and non-Markovian regime. We find that the… read more here.
Keywords: optimal protection; quantum coherence; coherence; coherence noisy ... See more keywords
Quantum Coherence and Transfer of Quantum Information with a Kerr Medium Under Decoherence
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-020-04693-w
Abstract: We investigate the dynamics of quantum coherence of a system consisting of two interacting atoms coupling with a common cavity which is filled with a nonlinear Kerr-like medium, in the presence of intrinsic decoherence. It… read more here.
Keywords: quantum information; quantum coherence; quantum; interaction ... See more keywords
Thermal Nonlocal Advantage of Quantum Coherence in the Two-Site, Triangular, and Tetrahedral Lattices with Heisenberg Interactions
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-021-04800-5
Abstract: Quantum correlations are physical resources for quantum information processing. The nonlocal advantage of quantum coherence (NAQC) is a kind of quantum correlation which is stronger than entanglement. We report here methods for enhancing thermal NAQC… read more here.
Keywords: nonlocal advantage; triangular tetrahedral; quantum coherence; advantage quantum ... See more keywords
Relationship between quantum coherence and uncertainty bound in an arbitrary two-qubit X-state
Sign Up to like & getrecommendations! Published in 2021 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-021-03176-4
Abstract: By considering one of the particles as a memory in a two-particle system, the entropic uncertainty relation can be improved and it is called quantum-memory-assisted entropic uncertainty relation. On the other hand, quantum coherence is… read more here.
Keywords: two qubit; quantum coherence; uncertainty bound; uncertainty ... See more keywords
Probing quantum coherence, uncertainty, steerability of quantum coherence and quantum phase transition in the spin model
Sign Up to like & getrecommendations! Published in 2017 at "Quantum Information Processing"
DOI: 10.1007/s11128-017-1588-9
Abstract: In this paper, we study the relation among quantum coherence, uncertainty, steerability of quantum coherence based on skew information and quantum phase transition in the spin model by employing quantum renormalization-group method. Interestingly, the results… read more here.
Keywords: quantum coherence; quantum; coherence; uncertainty ... See more keywords
Non-Markovian dynamics of quantum coherence of two-level system driven by classical field
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DOI: 10.1007/s11128-017-1673-0
Abstract: In this paper, we study the quantum coherence dynamics of two-level atom system embedded in non-Markovian reservoir in the presence of classical driving field. We analyze the influence of memory effects, classical driving, and detuning… read more here.
Keywords: non markovian; quantum coherence; resonant case; coherence ... See more keywords
Preparation of freezing quantum state for quantum coherence
Sign Up to like & getrecommendations! Published in 2018 at "Quantum Information Processing"
DOI: 10.1007/s11128-018-1889-7
Abstract: We provide a method to prepare the freezing quantum state for quantum coherence via unitary operations. The initial product state consists of the control qubit and target qubit; when it satisfies certain conditions, the initial… read more here.
Keywords: state; quantum state; quantum coherence; freezing quantum ... See more keywords
Quantum coherence dynamics of three-qubit states in XY spin-chain environment
Sign Up to like & getrecommendations! Published in 2018 at "Quantum Information Processing"
DOI: 10.1007/s11128-018-2066-8
Abstract: We investigate the dynamics of quantum coherence, based on relative entropy and quantum skew information, for tripartite systems in a quantum-critical environment. We demonstrate that initial states, the strength of magnetic field, anisotropy parameter, system–environment… read more here.
Keywords: quantum coherence; coherence; chain environment; spin chain ... See more keywords
Quantum coherence as indicators of quantum phase transitions, factorization and thermal phase transitions in the anisotropic XY model
Sign Up to like & getrecommendations! Published in 2018 at "Quantum Information Processing"
DOI: 10.1007/s11128-018-2090-8
Abstract: Quantifying quantum coherence has attracted considerable interests. In the present work, we employ two measures of quantum coherence recently proposed in terms of the skew information and the trace norm, respectively, to investigate the quantum… read more here.
Keywords: quantum coherence; information; phase transitions; coherence ... See more keywords