Autonomous Maxwell's demon in a cavity QED system
We present an autonomous Maxwell's demon scheme. It is first analyzed theoretically in terms of information exchange in a closed system and then implemented experimentally with a single Rydberg atom and a high-quality microwave resonator. The atom simulates both a qubit interacting with the cav...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-07-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.032025 |
| _version_ | 1797211371252744192 |
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| author | Baldo-Luis Najera-Santos Patrice A. Camati Valentin Métillon Michel Brune Jean-Michel Raimond Alexia Auffèves Igor Dotsenko |
| author_facet | Baldo-Luis Najera-Santos Patrice A. Camati Valentin Métillon Michel Brune Jean-Michel Raimond Alexia Auffèves Igor Dotsenko |
| author_sort | Baldo-Luis Najera-Santos |
| collection | DOAJ |
| description | We present an autonomous Maxwell's demon scheme. It is first analyzed theoretically in terms of information exchange in a closed system and then implemented experimentally with a single Rydberg atom and a high-quality microwave resonator. The atom simulates both a qubit interacting with the cavity and a demon carrying information on the qubit state. While the cold qubit crosses the hot cavity, the demon prevents energy absorption from the cavity mode, apparently violating the second law of thermodynamics. Taking into account the change of the mutual information between the demon and the qubit-cavity system gives rise to a generalized expression of the second law that we establish and measure. Finally, considering the closed qubit-cavity-demon system, we establish and measure that the generalized second law can be recast into an entropy conservation law, as expected for a unitary evolution. |
| first_indexed | 2024-04-24T10:25:25Z |
| format | Article |
| id | doaj.art-f23fcfa88c924939ac3ba46404d1f25f |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:25:25Z |
| publishDate | 2020-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-f23fcfa88c924939ac3ba46404d1f25f2024-04-12T16:57:42ZengAmerican Physical SocietyPhysical Review Research2643-15642020-07-012303202510.1103/PhysRevResearch.2.032025Autonomous Maxwell's demon in a cavity QED systemBaldo-Luis Najera-SantosPatrice A. CamatiValentin MétillonMichel BruneJean-Michel RaimondAlexia AuffèvesIgor DotsenkoWe present an autonomous Maxwell's demon scheme. It is first analyzed theoretically in terms of information exchange in a closed system and then implemented experimentally with a single Rydberg atom and a high-quality microwave resonator. The atom simulates both a qubit interacting with the cavity and a demon carrying information on the qubit state. While the cold qubit crosses the hot cavity, the demon prevents energy absorption from the cavity mode, apparently violating the second law of thermodynamics. Taking into account the change of the mutual information between the demon and the qubit-cavity system gives rise to a generalized expression of the second law that we establish and measure. Finally, considering the closed qubit-cavity-demon system, we establish and measure that the generalized second law can be recast into an entropy conservation law, as expected for a unitary evolution.http://doi.org/10.1103/PhysRevResearch.2.032025 |
| spellingShingle | Baldo-Luis Najera-Santos Patrice A. Camati Valentin Métillon Michel Brune Jean-Michel Raimond Alexia Auffèves Igor Dotsenko Autonomous Maxwell's demon in a cavity QED system Physical Review Research |
| title | Autonomous Maxwell's demon in a cavity QED system |
| title_full | Autonomous Maxwell's demon in a cavity QED system |
| title_fullStr | Autonomous Maxwell's demon in a cavity QED system |
| title_full_unstemmed | Autonomous Maxwell's demon in a cavity QED system |
| title_short | Autonomous Maxwell's demon in a cavity QED system |
| title_sort | autonomous maxwell s demon in a cavity qed system |
| url | http://doi.org/10.1103/PhysRevResearch.2.032025 |
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