Quantum Noise as an Entanglement Meter
Transport in a quantum point contact (QPC) can be used to generate many-body entanglement of Fermi seas in the leads. A universal relation is found between the generated entanglement entropy and the fluctuations of electric current, which is valid for any protocol of driving the QPC. This relation...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51772 https://orcid.org/0000-0002-4268-731X |
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| author | Klich, Israel Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Klich, Israel Levitov, Leonid |
| author_sort | Klich, Israel |
| collection | MIT |
| description | Transport in a quantum point contact (QPC) can be used to generate many-body entanglement of Fermi
seas in the leads. A universal relation is found between the generated entanglement entropy and the
fluctuations of electric current, which is valid for any protocol of driving the QPC. This relation offers a
basis for direct electric measurement of entanglement entropy. In particular, by utilizing space-time
duality of 1D systems, we relate electric noise generated by opening and closing the QPC periodically in
time with the seminal S=1/3 logL prediction of conformal field theory. |
| first_indexed | 2024-09-23T11:46:22Z |
| format | Article |
| id | mit-1721.1/51772 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:46:22Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/517722022-10-01T05:54:18Z Quantum Noise as an Entanglement Meter Klich, Israel Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Levitov, Leonid Levitov, Leonid Transport in a quantum point contact (QPC) can be used to generate many-body entanglement of Fermi seas in the leads. A universal relation is found between the generated entanglement entropy and the fluctuations of electric current, which is valid for any protocol of driving the QPC. This relation offers a basis for direct electric measurement of entanglement entropy. In particular, by utilizing space-time duality of 1D systems, we relate electric noise generated by opening and closing the QPC periodically in time with the seminal S=1/3 logL prediction of conformal field theory. W. M. Keck Foundation Center for Extreme Quantum Information Theory National Science Foundation 2010-02-17T16:40:59Z 2010-02-17T16:40:59Z 2009-03 2008-06 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/51772 Klich, Israel , and Leonid Levitov. “Quantum Noise as an Entanglement Meter.” Physical Review Letters 102.10 (2009): 100502. © 2009 The American Physical Society. https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1103/PhysRevLett.102.100502 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Klich, Israel Levitov, Leonid Quantum Noise as an Entanglement Meter |
| title | Quantum Noise as an Entanglement Meter |
| title_full | Quantum Noise as an Entanglement Meter |
| title_fullStr | Quantum Noise as an Entanglement Meter |
| title_full_unstemmed | Quantum Noise as an Entanglement Meter |
| title_short | Quantum Noise as an Entanglement Meter |
| title_sort | quantum noise as an entanglement meter |
| url | http://hdl.handle.net/1721.1/51772 https://orcid.org/0000-0002-4268-731X |
| work_keys_str_mv | AT klichisrael quantumnoiseasanentanglementmeter AT levitovleonid quantumnoiseasanentanglementmeter |