تقرير
Universal cooling dynamics toward a quantum critical point
| العنوان: | Universal cooling dynamics toward a quantum critical point |
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| المؤلفون: | King, Emma C., Kriel, Johannes N., Kastner, Michael |
| المصدر: | Phys. Rev. Lett. 130, 050401 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Quantum Gases, Condensed Matter - Statistical Mechanics |
| الوصف: | We investigate the loss of adiabaticity when cooling a many-body quantum system from an initial thermal state toward a quantum critical point. The excitation density, which quantifies the degree of adiabaticity of the dynamics, is found to obey scaling laws in the cooling velocity as well as in the initial and final temperatures of the cooling protocol. The scaling laws are universal, governed by the critical exponents of the quantum phase transition. The validity of these statements is shown analytically for a Kitaev quantum wire coupled to Markovian baths and argued to be valid under rather general conditions. Our results establish that quantum critical properties can be probed dynamically at finite temperature, without even varying the control parameter of the quantum phase transition. Comment: 6+5 pages, 2+3 figures; companion paper to arXiv:2204.07594 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.130.050401 |
| URL الوصول: | http://arxiv.org/abs/2204.07594 |
| رقم الأكسشن: | edsarx.2204.07594 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.130.050401 |
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