Data and Code for "Measurement-induced symmetry restoration and quantum Mpemba effect"
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| Formato: | Recurso digital |
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2025
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| _version_ | 1866901990489980928 |
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| author | Turkeshi, Xhek Murciano, Sara |
| author_facet | Turkeshi, Xhek Murciano, Sara |
| contents | <p>Monitoring a quantum system can profoundly alter its dynamical properties, leading to nontrivial emergent phenomena. In this work, we demonstrate that dynamical measurements strongly influence the evolution of symmetry in many-body quantum systems. Specifically, we demonstrate that monitored systems governed by non-Hermitian dynamics exhibit a quantum Mpemba effect, where systems with stronger initial asymmetry relax faster to a symmetric state. Crucially, this phenomenon is purely measurement-induced: in the absence of measurements, we find states where the corresponding unitary evolution does not display any Mpemba effect. Furthermore, we uncover a novel measurement-induced symmetry restoration mechanism: below a critical measurement rate, the symmetry remains broken, but beyond a threshold, it is fully restored in the thermodynamic limit--along with the emergence of the quantum Mpemba effect.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15181115 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Data and Code for "Measurement-induced symmetry restoration and quantum Mpemba effect" Turkeshi, Xhek Murciano, Sara <p>Monitoring a quantum system can profoundly alter its dynamical properties, leading to nontrivial emergent phenomena. In this work, we demonstrate that dynamical measurements strongly influence the evolution of symmetry in many-body quantum systems. Specifically, we demonstrate that monitored systems governed by non-Hermitian dynamics exhibit a quantum Mpemba effect, where systems with stronger initial asymmetry relax faster to a symmetric state. Crucially, this phenomenon is purely measurement-induced: in the absence of measurements, we find states where the corresponding unitary evolution does not display any Mpemba effect. Furthermore, we uncover a novel measurement-induced symmetry restoration mechanism: below a critical measurement rate, the symmetry remains broken, but beyond a threshold, it is fully restored in the thermodynamic limit--along with the emergence of the quantum Mpemba effect.</p> |
| title | Data and Code for "Measurement-induced symmetry restoration and quantum Mpemba effect" |
| url | https://doi.org/10.5281/zenodo.15181115 |