Quantum-enhanced measurements without entanglement

D Braun, G Adesso, F Benatti, R Floreanini… - Reviews of Modern …, 2018 - APS
Quantum-enhanced measurements exploit quantum mechanical effects for increasing the
sensitivity of measurements of certain physical parameters and have great potential for both …

Geometry of quantum phase transitions

A Carollo, D Valenti, B Spagnolo - Physics Reports, 2020 - Elsevier
In this article we provide a review of geometrical methods employed in the analysis of
quantum phase transitions and non-equilibrium dissipative phase transitions. After a …

Coherent and dissipative dynamics at quantum phase transitions

D Rossini, E Vicari - Physics Reports, 2021 - Elsevier
The many-body physics at quantum phase transitions shows a subtle interplay between
quantum and thermal fluctuations, emerging in the low-temperature limit. In this review, we …

At the limits of criticality-based quantum metrology: Apparent super-Heisenberg scaling revisited

MM Rams, P Sierant, O Dutta, P Horodecki… - Physical Review X, 2018 - APS
We address the question of whether the super-Heisenberg scaling for quantum estimation is
indeed realizable. We unify the results of two approaches. In the first one, the original system …

Quantum phase transition and critical behavior between the gapless topological phases

HL Zhang, HZ Li, S Yang, XJ Yu - Physical Review A, 2024 - APS
The phase transition between gapped topological phases represents a class of
unconventional criticality beyond the Landau paradigm. However, recent research has …

Cavity light-matter entanglement through quantum fluctuations

G Passetti, CJ Eckhardt, MA Sentef, DM Kennes - Physical Review Letters, 2023 - APS
The hybridization between light and matter forms the basis to achieve cavity control over
quantum materials. In this Letter we investigate a cavity coupled to a quantum chain of …

Fidelity susceptibility at the Lifshitz transition between the noninteracting topologically distinct quantum critical points

XJ Yu, WL Li - Physical Review B, 2024 - APS
By constructing an exactly solvable spin model, we investigate the critical behaviors of
transverse-field Ising chains interpolated with cluster interactions, which exhibit various …

Fidelity susceptibility made simple: A unified quantum Monte Carlo approach

L Wang, YH Liu, J Imriška, PN Ma, M Troyer - Physical Review X, 2015 - APS
The fidelity susceptibility is a general purpose probe of phase transitions. With its origin in
quantum information and in the differential geometry perspective of quantum states, the …

Fidelity susceptibility as a diagnostic of the commensurate-incommensurate transition: A revisit of the programmable Rydberg chain

XJ Yu, S Yang, JB Xu, L Xu - Physical Review B, 2022 - APS
In recent years, programmable Rydberg-atom arrays have been widely used to simulate
new quantum phases and phase transitions, generating great interest among theorists and …

[HTML][HTML] General properties of fidelity in non-Hermitian quantum systems with PT symmetry

YT Tu, I Jang, PY Chang, YC Tzeng - Quantum, 2023 - quantum-journal.org
The fidelity susceptibility is a tool for studying quantum phase transitions in the Hermitian
condensed matter systems. Recently, it has been generalized with the biorthogonal basis for …