Frequency estimation under non-Markovian spatially correlated quantum noise
We study the estimation precision attainable by entanglement-enhanced Ramsey interferometry in the presence of spatiotemporally correlated non-classical noise. Our analysis relies on an exact expression of the reduced density matrix of the qubit probes under general zero-mean Gaussian stationary dep...
| Glavni autori: | , , , |
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| Format: | Članak |
| Jezik: | English |
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IOP Publishing
2022-01-01
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| Serija: | New Journal of Physics |
| Teme: | |
| Online pristup: | https://doi.org/10.1088/1367-2630/ac92a2 |
| _version_ | 1827870994372493312 |
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| author | Francisco Riberi Leigh M Norris Félix Beaudoin Lorenza Viola |
| author_facet | Francisco Riberi Leigh M Norris Félix Beaudoin Lorenza Viola |
| author_sort | Francisco Riberi |
| collection | DOAJ |
| description | We study the estimation precision attainable by entanglement-enhanced Ramsey interferometry in the presence of spatiotemporally correlated non-classical noise. Our analysis relies on an exact expression of the reduced density matrix of the qubit probes under general zero-mean Gaussian stationary dephasing, which is established through cumulant-expansion techniques and may be of independent interest in the context of non-Markovian open dynamics. By continuing and expanding our previous work (Beaudoin et al 2018 Phys. Rev. A 98 020102(R)), we analyze the effects of a non-collective coupling regime between the qubit probes and their environment, focusing on two limiting scenarios where the couplings may take only two or a continuum of possible values. In the paradigmatic case of spin–boson dephasing noise from a thermal environment, we find that it is in principle possible to suppress, on average , the effect of spatial correlations by randomizing the location of the probes , as long as enough configurations are sampled where noise correlations are negative. As a result, superclassical precision scaling is asymptotically restored for initial entangled states, including experimentally accessible one-axis spin-squeezed states. |
| first_indexed | 2024-03-12T16:03:42Z |
| format | Article |
| id | doaj.art-81815bb906374b84be3cfad3370c9930 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:03:42Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-81815bb906374b84be3cfad3370c99302023-08-09T14:27:18ZengIOP PublishingNew Journal of Physics1367-26302022-01-01241010301110.1088/1367-2630/ac92a2Frequency estimation under non-Markovian spatially correlated quantum noiseFrancisco Riberi0Leigh M Norris1Félix Beaudoin2Lorenza Viola3https://orcid.org/0000-0002-8728-9235Department of Physics and Astronomy, Dartmouth College , 6127 Wilder Laboratory, Hanover, NH 03755, United States of AmericaJohns Hopkins University Applied Physics Laboratory , 11100 Johns Hopkins Road, Laurel, MD 20723, United States of AmericaNanoacademic Technologies Inc. , 666 rue Sherbrooke Ouest, Suite 802, Montréal, Québec, H3A 1E7, CanadaDepartment of Physics and Astronomy, Dartmouth College , 6127 Wilder Laboratory, Hanover, NH 03755, United States of AmericaWe study the estimation precision attainable by entanglement-enhanced Ramsey interferometry in the presence of spatiotemporally correlated non-classical noise. Our analysis relies on an exact expression of the reduced density matrix of the qubit probes under general zero-mean Gaussian stationary dephasing, which is established through cumulant-expansion techniques and may be of independent interest in the context of non-Markovian open dynamics. By continuing and expanding our previous work (Beaudoin et al 2018 Phys. Rev. A 98 020102(R)), we analyze the effects of a non-collective coupling regime between the qubit probes and their environment, focusing on two limiting scenarios where the couplings may take only two or a continuum of possible values. In the paradigmatic case of spin–boson dephasing noise from a thermal environment, we find that it is in principle possible to suppress, on average , the effect of spatial correlations by randomizing the location of the probes , as long as enough configurations are sampled where noise correlations are negative. As a result, superclassical precision scaling is asymptotically restored for initial entangled states, including experimentally accessible one-axis spin-squeezed states.https://doi.org/10.1088/1367-2630/ac92a2noisy quantum metrologyRamsey interferometryopen quantum systemsspatially correlated non-Markovian quantum noise |
| spellingShingle | Francisco Riberi Leigh M Norris Félix Beaudoin Lorenza Viola Frequency estimation under non-Markovian spatially correlated quantum noise New Journal of Physics noisy quantum metrology Ramsey interferometry open quantum systems spatially correlated non-Markovian quantum noise |
| title | Frequency estimation under non-Markovian spatially correlated quantum noise |
| title_full | Frequency estimation under non-Markovian spatially correlated quantum noise |
| title_fullStr | Frequency estimation under non-Markovian spatially correlated quantum noise |
| title_full_unstemmed | Frequency estimation under non-Markovian spatially correlated quantum noise |
| title_short | Frequency estimation under non-Markovian spatially correlated quantum noise |
| title_sort | frequency estimation under non markovian spatially correlated quantum noise |
| topic | noisy quantum metrology Ramsey interferometry open quantum systems spatially correlated non-Markovian quantum noise |
| url | https://doi.org/10.1088/1367-2630/ac92a2 |
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