dorsal/arxiv
View SchemaNonlinear quantum Kibble-Zurek ramps in open systems at finite temperature
| Authors | Johannes N. Kriel, Emma C. King, Michael Kastner |
|---|---|
| Categories | |
| ArXiv ID | 2601.10465vv1 |
| URL | https://arxiv.org/abs/2601.10465 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
We analyze quantum systems under a broad class of protocols in which the temperature and a Hamiltonian control parameter are ramped simultaneously and, in general, in a nonlinear fashion toward a quantum critical point. Using an open-system version of a Kitaev quantum wire as an example, we show that, unlike finite-temperature protocols at fixed temperature, these protocols allow us to probe, in an out-of-equilibrium situation and at finite temperature, the universality class (characterized by the critical exponents $\nu$ and $z$) of an equilibrium quantum phase transition at zero temperature. Key to this is the identification of ramps in which both coherent and incoherent parts of the open-system dynamics affect the excitation density in a non-negligible way. We also identify the specific ramps for which subleading corrections to the asymptotic scaling laws are suppressed, which serves as a guide to dynamically probing quantum critical exponents in experimentally realistic finite-temperature situations.
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"abstract": "We analyze quantum systems under a broad class of protocols in which the temperature and a Hamiltonian control parameter are ramped simultaneously and, in general, in a nonlinear fashion toward a quantum critical point. Using an open-system version of a Kitaev quantum wire as an example, we show that, unlike finite-temperature protocols at fixed temperature, these protocols allow us to probe, in an out-of-equilibrium situation and at finite temperature, the universality class (characterized by the critical exponents $\\nu$ and $z$) of an equilibrium quantum phase transition at zero temperature. Key to this is the identification of ramps in which both coherent and incoherent parts of the open-system dynamics affect the excitation density in a non-negligible way. We also identify the specific ramps for which subleading corrections to the asymptotic scaling laws are suppressed, which serves as a guide to dynamically probing quantum critical exponents in experimentally realistic finite-temperature situations.",
"arxiv_id": "2601.10465",
"authors": [
"Johannes N. Kriel",
"Emma C. King",
"Michael Kastner"
],
"categories": [
"quant-ph",
"cond-mat.quant-gas",
"cond-mat.stat-mech"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Nonlinear quantum Kibble-Zurek ramps in open systems at finite temperature",
"url": "https://arxiv.org/abs/2601.10465",
"version": "v1"
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