Journal ArticleDOI
Dynamics of decoherence without dissipation in a squeezed thermal bath
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In this article, a generic open quantum system where the coupling between the system and its environment is of an energy-preserving quantum nondemolition (QND) type is studied.Abstract:
We study a generic open quantum system where the coupling between the system and its environment is of an energy-preserving quantum nondemolition (QND) type. We obtain the general master equation for the evolution of such a system under the influence of a squeezed thermal bath of harmonic oscillators. From the master equation it can be seen explicitly that the process involves decoherence or dephasing without any dissipation of energy. We work out the decoherence-causing term in the high- and zero-temperature limits and check that they match with known results for the case of a thermal bath. The decay of the coherence is quantified as well by the dynamics of the linear entropy of the system under various environmental conditions. We make a comparison of the quantum statistical properties between QND and dissipative types of evolution using a two-level atomic system and a harmonic oscillator.read more
Citations
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Journal ArticleDOI
Quantum thermometry in a squeezed thermal bath
TL;DR: In this paper, the dephasing dynamics of the quantum Fisher information (QFI) for the process of quantum thermometry with probes coupled to squeezed thermal baths via the nondemolition interaction was discussed.
Journal ArticleDOI
Decoherence without dissipation due to fermionic bath
TL;DR: In this paper, an exact solution to a model of a harmonic oscillator coupled to a fermionic environment via a quantum non-demolition type interaction was provided, based on the formalism of the fermion coherent state of Cahil and Glauber.
Journal ArticleDOI
Coherence-based measure of quantumness in (non-) Markovian channels
Javid Naikoo,Subhashish Banerjee +1 more
TL;DR: In this paper, a detailed analysis of quantumness for various quantum noise channels, both Markovian and non-Markovian, is presented. And the authors make use of a recently introduced witness for quantumness based on the square $$l_1$$ norm of coherence.
Journal ArticleDOI
The effect of quantum memory on quantum speed limit time for CP-(in)divisible channels
TL;DR: In this article , the authors discuss the characteristics of quantum speed limit time as a function of quantum memory, quantified as the deviation from temporal self-similarity of quantum dynamical maps for CP-divisible as well as indivisible maps.
Journal ArticleDOI
Quantum Correlation in Squeezed Generalized Amplitude Damping Channels with Memory
Youngmin Jeong,Hyundong Shin +1 more
TL;DR: This paper analyzes the dynamics of quantum entanglement and discord in the SGAD channel with memory and derives the concurrence and discord of Werner-like mixed states sent by successive uses of the channel.
References
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Book
Quantum Computation and Quantum Information
TL;DR: In this article, the quantum Fourier transform and its application in quantum information theory is discussed, and distance measures for quantum information are defined. And quantum error-correction and entropy and information are discussed.
Book
The Theory of Open Quantum Systems
TL;DR: Probability in classical and quantum physics has been studied in this article, where classical probability theory and stochastic processes have been applied to quantum optical systems and non-Markovian dynamics in physical systems.
Journal ArticleDOI
Coherence in Spontaneous Radiation Processes
TL;DR: In this article, the authors considered a radiating gas as a single quantum-mechanical system, and the energy levels corresponding to certain correlations between individual molecules were described, where spontaneous emission of radiation in a transition between two such levels leads to the emission of coherent radiation.
Journal ArticleDOI
The Theory of a general quantum system interacting with a linear dissipative system
TL;DR: In this paper, a formalism has been developed, using Feynman's space-time formulation of nonrelativistic quantum mechanics whereby the behavior of a system of interest, which is coupled to other external quantum systems, may be calculated in terms of its own variables only.