Multiparameter critical quantum metrology with impurity probes

G Mihailescu, A Bayat, S Campbell… - Quantum Science and …, 2024 - iopscience.iop.org
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Optimality and noise resilience of critical quantum sensing

U Alushi, W Górecki, S Felicetti, R Di Candia - Physical Review Letters, 2024 - APS
We compare critical quantum sensing to passive quantum strategies to perform frequency
estimation, in the case of single-mode quadratic Hamiltonians. We show that, while in the …

Thermometry of strongly correlated fermionic quantum systems using impurity probes

G Mihailescu, S Campbell, AK Mitchell - Physical Review A, 2023 - APS
We study quantum-impurity models as a platform for quantum thermometry. A single
quantum spin-1 2 impurity is coupled to an explicit, structured, fermionic thermal sample …

Switchable superradiant phase transition with Kerr magnons

G Liu, W **ong, ZJ Ying - Physical Review A, 2023 - APS
The superradiant phase transition (SPT) has been widely studied in cavity quantum
electrodynamics (CQED). However, this SPT is still subject to ongoing debates due to the no …

Modular many-body quantum sensors

C Mukhopadhyay, A Bayat - Physical Review Letters, 2024 - APS
Quantum many-body systems undergoing phase transitions have been proposed as probes
enabling beyond-classical enhancement of sensing precision. However, this enhancement …

[HTML][HTML] Critical quantum metrology in the non-linear quantum Rabi model

ZJ Ying, S Felicetti, G Liu, D Braak - Entropy, 2022 - mdpi.com
The quantum Rabi model (QRM) with linear coupling between light mode and qubit exhibits
the analog of a second-order phase transition for vanishing mode frequency which allows …

Criticality-enhanced electric field gradient sensor with single trapped ions

T Ilias, D Yang, SF Huelga, MB Plenio - npj Quantum Information, 2024 - nature.com
We propose and analyze a driven-dissipative quantum sensor that is continuously
monitored close to a dissipative critical point. The sensor relies on the critical open Rabi …

Robust Topological Feature against Non‐Hermiticity in Jaynes–Cummings Model

ZJ Ying - Advanced Quantum Technologies, 2024 - Wiley Online Library
Abstract The Jaynes–Cummings Model (JCM) is a fundamental model and building block for
light‐matter interactions, quantum information and quantum computation. The present work …

Unique steady-state squeezing in a driven quantum Rabi model

K Gietka, C Hotter, H Ritsch - Physical Review Letters, 2023 - APS
Squeezing is essential to many quantum technologies and our understanding of quantum
physics. Here, we show a novel type of steady-state squeezing that can be generated in the …

Quantum enhanced sensitivity through many-body bloch oscillations

H Manshouri, M Zarei, M Abdi, S Bose… - arxiv preprint arxiv …, 2024 - arxiv.org
We investigate the sensing capacity of non-equilibrium dynamics in quantum systems
exhibiting Bloch oscillations. By focusing on the resource efficiency of the probe, quantified …