Relative entropy of coherence quantifies performance in Bayesian metrology

R Lecamwasam, S Assad, JJ Hope, PK Lam… - PRX Quantum, 2024 - APS
The ability of quantum states to be in superposition is one of the key features that sets them
apart from the classical world. This “coherence” is rigorously quantified by resource theories …

Measuring the quadrature coherence scale on a cloud quantum computer

AZ Goldberg, GS Thekkadath, K Heshami - Physical Review A, 2023 - APS
Coherence underlies quantum phenomena, yet it is manifest in classical theories;
delineating coherence's role is a fickle business. The quadrature coherence scale (QCS) …

Clock–work trade-off relation for coherence in quantum thermodynamics

H Kwon, H Jeong, D Jennings, B Yadin, MS Kim - Physical review letters, 2018 - APS
In thermodynamics, quantum coherences—superpositions between energy eigenstates—
behave in distinctly nonclassical ways. Here we describe how thermodynamic coherence …

Family of coherence measures and duality between quantum coherence and path distinguishability

C Xiong, A Kumar, J Wu - Physical Review A, 2018 - APS
Coherence measures and their operational interpretations lay the cornerstone of coherence
theory. In this paper, we introduce a class of coherence measures with α affinity, say α …

Entanglement as the symmetric portion of correlated coherence

KC Tan, H Jeong - Physical review letters, 2018 - APS
We show that the symmetric portion of correlated coherence is always a valid quantifier of
entanglement, and that this property is independent of the particular choice of coherence …

[HTML][HTML] Average versus maximal coherence

S Luo, Y Sun - Physics Letters A, 2019 - Elsevier
Coherence is a fundamental feature of quantum mechanics and plays a crucial role in the
quantum realm. The issue of quantification of coherence has received considerable interests …

Quadrature coherence scale driven fast decoherence of bosonic quantum field states

A Hertz, S De Bièvre - Physical Review Letters, 2020 - APS
We introduce, for each state of a bosonic quantum field, its quadrature coherence scale
(QCS), a measure of the range of its quadrature coherences. Under coupling to a thermal …

Quantum asymmetry and noisy multimode interferometry

F Albarelli, M Mazelanik, M Lipka, A Streltsov… - Physical Review Letters, 2022 - APS
Quantum asymmetry is a physical resource that coincides with the amount of coherence
between the eigenspaces of a generator responsible for phase encoding in interferometric …

Uncertainty relations for coherence

SL Luo, Y Sun - Communications in Theoretical Physics, 2019 - iopscience.iop.org
Quantum mechanical uncertainty relations are fundamental consequences of the
incompatible nature of noncommuting observables. In terms of the coherence measure …

From asymmetry to correlations

N Li, S Luo, Y Sun - Europhysics Letters, 2020 - iopscience.iop.org
Symmetry, as well as the dual concept of asymmetry, are essential, powerful and ubiquitous
in physics and nature. Motivated by the original Wigner-Yanase skew information and its …