Collisional quantum thermometry

S Seah, S Nimmrichter, D Grimmer, JP Santos… - Physical review …, 2019 - APS
We introduce a general framework for thermometry based on collisional models, where
ancillas probe the temperature of the environment through an intermediary system. This …

Experimental estimation of the quantum Fisher information from randomized measurements

M Yu, D Li, J Wang, Y Chu, P Yang, M Gong… - Physical Review …, 2021 - APS
The quantum Fisher information (QFI) represents a fundamental concept in quantum
physics. It quantifies the metrological potential of quantum states in quantum parameter …

Indistinguishability-enabled coherence for quantum metrology

A Castellini, R Lo Franco, L Lami, A Winter, G Adesso… - Physical Review A, 2019 - APS
Quantum coherence plays a fundamental and operational role in different areas of physics.
A resource theory has been developed to characterize the coherence of distinguishable …

Intrinsic decoherence effects on correlated coherence and quantum discord in XXZ Heisenberg model

Z Dahbi, M Oumennana, M Mansour - Optical and Quantum Electronics, 2023 - Springer
Spin qubits are at the heart of technological advances in quantum processors and offer an
excellent framework for quantum information processing. This work characterizes the time …

Quantum coherence versus quantum-memory-assisted entropic uncertainty relation in a mixed spin-(1/2, 1) Heisenberg dimer

M Oumennana, M Mansour - Optical and Quantum Electronics, 2023 - Springer
We investigate the behavior of quantum coherence and quantum-memory-assisted entropic
uncertainty relation (QMA-EUR) in a mixed spin-(1/2, 1) Heisenberg dimer. We analyze the …

Stochastic collisional quantum thermometry

E O'Connor, B Vacchini, S Campbell - Entropy, 2021 - mdpi.com
We extend collisional quantum thermometry schemes to allow for stochasticity in the waiting
time between successive collisions. We establish that introducing randomness through a …

Surpassing the thermal Cramér-Rao bound with collisional thermometry

A Shu, S Seah, V Scarani - Physical Review A, 2020 - APS
In collisional thermometry, a system in contact with the thermal bath is probed by a stream of
ancillas. Coherences and collective measurements were shown to improve the Fisher …

Enhancing precision of atomic clocks by tuning disorder in accessories

A Bhattacharyya, A Ghoshal, U Sen - Physical Review A, 2024 - APS
We find that a quantum device having an accessory involving precision measurement can
have an enhancement of its metrological precision in estimating an unknown parameter of …

Quantum correlations and thermal coherence in a two-superconducting charge qubit system

M Benzahra, M Mansour, M Oumennana… - Laser …, 2023 - iopscience.iop.org
Superconducting charge qubits represent a cutting-edge technology in the field of quantum
computing, offering a promising platform for quantum processing. This study delves into the …

Time fractional evolution of two dipolar-coupled spins under DM and KSEA interactions

A Chhieb, M Oumennana, M Mansour… - Optical and Quantum …, 2024 - Springer
This research investigates the time-fractional dynamics of two interacting dipolar spins in the
presence of the Dzyaloshinsky-Moriya (DM) and Kaplan-Shekhtman-Entin-Wohlman …