Thermally driven quantum refrigerator autonomously resets superconducting qubit
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866915203822649344 |
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| author | Aamir, Mohammed Ali Suria, Paul Jamet Guzmán, José Antonio Marín Castillo-Moreno, Claudia Epstein, Jeffrey M. Halpern, Nicole Yunger Gasparinetti, Simone |
| author_facet | Aamir, Mohammed Ali Suria, Paul Jamet Guzmán, José Antonio Marín Castillo-Moreno, Claudia Epstein, Jeffrey M. Halpern, Nicole Yunger Gasparinetti, Simone |
| contents | Although classical thermal machines power industries and modern living, quantum thermal engines have yet to prove their utility. Here, we demonstrate a useful quantum absorption refrigerator formed from superconducting circuits. We use it to cool a transmon qubit to a temperature lower than that achievable with any one available bath, thereby resetting the qubit to an initial state suitable for quantum computing. The process is driven by a thermal gradient and is autonomous, requiring no external feedback. The refrigerator exploits an engineered three-body interaction between the target qubit and two auxiliary qudits. Each auxiliary qudit is coupled to a physical heat bath, realized with a microwave waveguide populated with synthesized quasithermal radiation. If the target qubit is initially fully excited, its effective temperature reaches a steady-state level of approximately 22~mK, lower than what can be achieved by existing state-of-the-art reset protocols. Our results demonstrate that superconducting circuits with propagating thermal fields can be used to experimentally explore quantum thermodynamics and apply it to quantum information-processing tasks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_16710 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Thermally driven quantum refrigerator autonomously resets superconducting qubit Aamir, Mohammed Ali Suria, Paul Jamet Guzmán, José Antonio Marín Castillo-Moreno, Claudia Epstein, Jeffrey M. Halpern, Nicole Yunger Gasparinetti, Simone Quantum Physics Statistical Mechanics Although classical thermal machines power industries and modern living, quantum thermal engines have yet to prove their utility. Here, we demonstrate a useful quantum absorption refrigerator formed from superconducting circuits. We use it to cool a transmon qubit to a temperature lower than that achievable with any one available bath, thereby resetting the qubit to an initial state suitable for quantum computing. The process is driven by a thermal gradient and is autonomous, requiring no external feedback. The refrigerator exploits an engineered three-body interaction between the target qubit and two auxiliary qudits. Each auxiliary qudit is coupled to a physical heat bath, realized with a microwave waveguide populated with synthesized quasithermal radiation. If the target qubit is initially fully excited, its effective temperature reaches a steady-state level of approximately 22~mK, lower than what can be achieved by existing state-of-the-art reset protocols. Our results demonstrate that superconducting circuits with propagating thermal fields can be used to experimentally explore quantum thermodynamics and apply it to quantum information-processing tasks. |
| title | Thermally driven quantum refrigerator autonomously resets superconducting qubit |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2305.16710 |