Quantum typicality approach to energy flow between two spin-chain domains at different temperatures
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912895458082816 |
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| author | Beckemeyer, Laurenz Kraft, Markus Kempa, Mariel Schuricht, Dirk Steinigeweg, Robin |
| author_facet | Beckemeyer, Laurenz Kraft, Markus Kempa, Mariel Schuricht, Dirk Steinigeweg, Robin |
| contents | We discuss a quantum typicality approach to examine systems composed of two subsystems at different temperatures. While dynamical quantum typicality is usually used to simulate high-temperature dynamics, we also investigate low-temperature dynamics using the method. To test our method, we investigate the energy current between subsystems at different temperatures in various paradigmatic spin-1/2 chains, specifically the XX chain, the critical transverse-field Ising chain, and the XXZ chain. We compare our numerics to existing analytical results and find a convincing agreement for the energy current in the steady state for all considered models and temperatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_23439 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum typicality approach to energy flow between two spin-chain domains at different temperatures Beckemeyer, Laurenz Kraft, Markus Kempa, Mariel Schuricht, Dirk Steinigeweg, Robin Statistical Mechanics Strongly Correlated Electrons Quantum Physics We discuss a quantum typicality approach to examine systems composed of two subsystems at different temperatures. While dynamical quantum typicality is usually used to simulate high-temperature dynamics, we also investigate low-temperature dynamics using the method. To test our method, we investigate the energy current between subsystems at different temperatures in various paradigmatic spin-1/2 chains, specifically the XX chain, the critical transverse-field Ising chain, and the XXZ chain. We compare our numerics to existing analytical results and find a convincing agreement for the energy current in the steady state for all considered models and temperatures. |
| title | Quantum typicality approach to energy flow between two spin-chain domains at different temperatures |
| topic | Statistical Mechanics Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2507.23439 |