Hyperacceleration of quantum thermalization dynamics by bypassing long-lived coherences: An analytical treatment

Ivander, Felix; Anto-Sztrikacs, Nicholas; Segal, Dvira

doi:10.1103/physreve.108.014130

Phys. Rev. E

2023

DOI: 10.1103/physreve.108.014130

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Hyperacceleration of quantum thermalization dynamics by bypassing long-lived coherences: An analytical treatment

Felix Ivander¹,

Nicholas Anto-Sztrikacs²,

Dvira Segal³

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2024

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Cited by 8 publications

References 96 publications

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Entanglement asymmetry and quantum Mpemba effect in the XY spin chain

Murciano,

Ares,

Klich

et al. 2024

J. Stat. Mech.

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Entanglement asymmetry is a quantity recently introduced to measure how much a symmetry is broken in a part of an extended quantum system. It has been employed to analyze the non-equilibrium dynamics of a broken symmetry after a global quantum quench with a Hamiltonian that preserves it. In this work, we carry out a comprehensive analysis of the entanglement asymmetry at equilibrium taking the ground state of the XY spin chain, which breaks the U(1) particle number symmetry, and provide a physical interpretation of it in terms of superconducting Cooper pairs. We also consider quenches from this ground state to the XX spin chain, which preserves the U(1) symmetry. In this case, the entanglement asymmetry reveals that the more the symmetry is initially broken, the faster it may be restored in a subsystem, a surprising and counter-intuitive phenomenon that is a type of a quantum Mpemba effect. We obtain a quasi-particle picture for the entanglement asymmetry in terms of Cooper pairs, from which we derive the microscopic conditions to observe the quantum Mpemba effect in this system, giving further support to the criteria recently proposed for arbitrary integrable quantum systems. In addition, we find that the power law governing symmetry restoration depends discontinuously on whether the initial state is critical or not, leading to new forms of strong and weak Mpemba effects.

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Entanglement asymmetry and quantum Mpemba effect in the XY spin chain

Murciano,

Ares,

Klich

et al. 2024

J. Stat. Mech.

View full text Add to dashboard Cite

show abstract

Bypassing thermalization timescales in temperature estimation using prethermal probes

Anto-Sztrikacs,

Miller,

Nazir

et al. 2024

Phys. Rev. A

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Multiple quantum Mpemba effect: Exceptional points and oscillations

Chatterjee,

Takada,

Hayakawa

2024

Phys. Rev. A

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Hyperacceleration of quantum thermalization dynamics by bypassing long-lived coherences: An analytical treatment

Cited by 8 publications

References 96 publications

Entanglement asymmetry and quantum Mpemba effect in the XY spin chain

Entanglement asymmetry and quantum Mpemba effect in the XY spin chain

Bypassing thermalization timescales in temperature estimation using prethermal probes

Multiple quantum Mpemba effect: Exceptional points and oscillations

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