Finite-Time Dynamics of an Entanglement Engine: Current, Fluctuations and Kinetic Uncertainty Relations

Entanglement engines are autonomous quantum thermal machines designed to generate entanglement from the presence of a particle current flowing through the device. In this work, we investigate the functioning of a two-qubit entanglement engine beyond the steady-state regime. Within a master equation...

Full description

Saved in:
Bibliographic Details
Published in:Entropy (Basel, Switzerland) Switzerland), 2024-06, Vol.26 (6), p.497
Main Authors: Bourgeois, Jeanne, Blasi, Gianmichele, Khandelwal, Shishir, Haack, Géraldine
Format: Article
Language:English
Subjects:
Condensed Matter Physics
Correlation
Critical current (superconductivity)
current fluctuations
Den kondenserade materiens fysik
Engines
Equilibrium
Fysik
Investigations
Machinery
Magneto-electric machines
Natural Sciences
Naturvetenskap
open quantum systems
Physical Sciences
quantum correlations
Quantum dots
quantum dynamics
Quantum entanglement
Qubits (quantum computing)
Steady state
Time dependence
Uncertainty
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Entanglement engines are autonomous quantum thermal machines designed to generate entanglement from the presence of a particle current flowing through the device. In this work, we investigate the functioning of a two-qubit entanglement engine beyond the steady-state regime. Within a master equation approach, we derive the time-dependent state, the particle current, as well as the associated current correlation functions. Our findings establish a direct connection between coherence and internal current, elucidating the existence of a critical current that serves as an indicator for entanglement in the steady state. We then apply our results to investigate kinetic uncertainty relations (KURs) at finite times. We demonstrate that there is more than one possible definition for KURs at finite times. Although the two definitions agree in the steady-state regime, they lead to different parameter ranges for violating KUR at finite times.
ISSN:1099-4300
1099-4300
DOI:10.3390/e26060497