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   Articles with "coherence quantum" as a keyword



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Topology-Controlled Phase Coherence and Quantum Fluctuations in Superconducting Nanowires

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recommendations! Published in 2020 at "Journal of Superconductivity and Novel Magnetism"

DOI: 10.1007/s10948-019-05381-5

Abstract: Superconducting properties of metallic nanowires may strongly depend on specific experimental conditions. Here we consider a setup where superconducting phase fluctuations are restricted at one point inside the wire and equilibrium supercurrent flows along the… read more here.

Keywords: coherence quantum; phase; phase coherence; controlled phase ... See more keywords

Coherence of quantum channels

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recommendations! Published in 2018 at "Annals of Physics"

DOI: 10.1016/j.aop.2018.08.014

Abstract: We investigate the coherence of quantum channels using the Choi-Jamiolkowski isomorphism. The relation between the coherence and the purity of the channel respects a duality relation. It characterizes the allowed values of coherence when the… read more here.

Keywords: coherence quantum; coherence; quantum channels; purity ... See more keywords

Long range quantum coherence, quantum & classical correlations in Heisenberg XX chain

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recommendations! Published in 2019 at "Physica A: Statistical Mechanics and its Applications"

DOI: 10.1016/j.physa.2018.11.062

Abstract: Abstract A comparative study of pairwise quantum coherence, quantum and classical correlations is addressed for non-nearest spin pairs of the 1D Heisenberg spin- 1 2 XX chain. Following the Jordan–Wigner mapping, we diagonalize the hamiltonian… read more here.

Keywords: chain; coherence quantum; quantum coherence; quantum ... See more keywords

Geometric coherence and quantum state discrimination

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recommendations! Published in 2018 at "Journal of Physics A: Mathematical and Theoretical"

DOI: 10.1088/1751-8121/aac979

Abstract: One of the important features of quantum mechanics is that non-orthogonal quantum states cannot be perfectly discriminated. Therefore, a fundamental problem in quantum mechanics is to design a optimal measurements to discriminate a collection of… read more here.

Keywords: coherence quantum; quantum; geometric coherence; quantum state ... See more keywords

Role of Coherence for Quantum Computational Advantage.

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recommendations! Published in 2024 at "Physical review letters"

DOI: 10.1103/1csn-x1cx

Abstract: Quantifying the resources available to a quantum computer appears to be necessary to separate quantum from classical computation. Among them, entanglement, nonstabilizerness, and coherence are arguably of great significance. We introduce "path coherence" as a… read more here.

Keywords: role coherence; computational advantage; quantum computational; coherence ... See more keywords

Coherence of quantum channels

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recommendations! Published in 2019 at "Physical Review A"

DOI: 10.1103/physreva.100.052311

Abstract: We investigate the coherence of quantum channels and establish a resource theory for quantifying the coherence of quantum channels via Choi matrix. To this aim, we define the incoherent channels and incoherent superchannels. This theory… read more here.

Keywords: coherence quantum; quantum channels; coherence;