Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry
We provide new operational significance of nonclassicality in nonequilibrium temperature estimation of bosonic baths with Gaussian probe states and Gaussian dynamics. We find a bound on the thermometry performance using classical probe states. Then we show that by using nonclassical probe states, si...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ad23a1 |
| _version_ | 1797299649318486016 |
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| author | Safoura Mirkhalaf Mohammad Mehboudi Zohre Nafari Qaleh Saleh Rahimi-Keshari |
| author_facet | Safoura Mirkhalaf Mohammad Mehboudi Zohre Nafari Qaleh Saleh Rahimi-Keshari |
| author_sort | Safoura Mirkhalaf |
| collection | DOAJ |
| description | We provide new operational significance of nonclassicality in nonequilibrium temperature estimation of bosonic baths with Gaussian probe states and Gaussian dynamics. We find a bound on the thermometry performance using classical probe states. Then we show that by using nonclassical probe states, single-mode and two-mode squeezed vacuum states, one can profoundly improve the classical limit. Interestingly, we observe that this improvement can also be achieved by using Gaussian measurements. Hence, we propose a fully Gaussian protocol for enhanced thermometry, which can simply be realized and used in quantum optics platforms. |
| first_indexed | 2024-03-07T22:52:46Z |
| format | Article |
| id | doaj.art-d3c807a562c242fdaf7fbb08bbb2cb05 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-07T22:52:46Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-d3c807a562c242fdaf7fbb08bbb2cb052024-02-23T08:38:26ZengIOP PublishingNew Journal of Physics1367-26302024-01-0126202304610.1088/1367-2630/ad23a1Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometrySafoura Mirkhalaf0Mohammad Mehboudi1https://orcid.org/0000-0002-0398-9200Zohre Nafari Qaleh2Saleh Rahimi-Keshari3https://orcid.org/0000-0003-2108-7486Department of Physics, University of Tehran , PO Box 14395-547, Tehran, Iran; School of Nano Science, Institute for Research in Fundamental Sciences (IPM) , PO Box 19395-5531, Tehran, Iran; Centre for Quantum Optical Technologies, Centre of New Technologies, University of Warsaw , Banacha 2c, 02-097 Warszawa, PolandTU Wien, Atominstitut , Stadionallee 2, Vienna 1020, Austria; Département de Physique Appliquée, Université de Genève , 1211 Genève, SwitzerlandSchool of Physics, Institute for Research in Fundamental Sciences (IPM) , PO Box 19395-5531, Tehran, IranDepartment of Physics, University of Tehran , PO Box 14395-547, Tehran, Iran; School of Physics, Institute for Research in Fundamental Sciences (IPM) , PO Box 19395-5531, Tehran, IranWe provide new operational significance of nonclassicality in nonequilibrium temperature estimation of bosonic baths with Gaussian probe states and Gaussian dynamics. We find a bound on the thermometry performance using classical probe states. Then we show that by using nonclassical probe states, single-mode and two-mode squeezed vacuum states, one can profoundly improve the classical limit. Interestingly, we observe that this improvement can also be achieved by using Gaussian measurements. Hence, we propose a fully Gaussian protocol for enhanced thermometry, which can simply be realized and used in quantum optics platforms.https://doi.org/10.1088/1367-2630/ad23a1quantum thermometryquantum metrologycontinuous variable systems |
| spellingShingle | Safoura Mirkhalaf Mohammad Mehboudi Zohre Nafari Qaleh Saleh Rahimi-Keshari Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry New Journal of Physics quantum thermometry quantum metrology continuous variable systems |
| title | Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry |
| title_full | Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry |
| title_fullStr | Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry |
| title_full_unstemmed | Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry |
| title_short | Operational significance of nonclassicality in nonequilibrium Gaussian quantum thermometry |
| title_sort | operational significance of nonclassicality in nonequilibrium gaussian quantum thermometry |
| topic | quantum thermometry quantum metrology continuous variable systems |
| url | https://doi.org/10.1088/1367-2630/ad23a1 |
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