[ { "id": "https://authors.library.caltech.edu/records/n94vk-jp965", "eprint_id": 18234, "eprint_status": "archive", "datestamp": "2023-08-21 21:13:43", "lastmod": "2024-01-12 23:39:45", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boixo-S", "name": { "family": "Boixo", "given": "Sergio" } }, { "id": "Datta-A", "name": { "family": "Datta", "given": "Animesh" } }, { "id": "Davis-M-J", "name": { "family": "Davis", "given": "Matthew J." } }, { "id": "Flammia-S-T", "name": { "family": "Flammia", "given": "Steven T." } }, { "id": "Shaji-A", "name": { "family": "Shaji", "given": "Anil" } }, { "id": "Tacla-A-B", "name": { "family": "Tacla", "given": "Alexandre B." } }, { "id": "Caves-C-M", "name": { "family": "Caves", "given": "Carlton M." } } ] }, "title": "Quantum metrology from an information theory perspective", "ispublished": "unpub", "full_text_status": "public", "keywords": "quantum metrology; nonlinear interferometry; Bose-Einstein condensate", "note": "\u00a9 2009 American Institute of Physics.\n\nIssue Date: 13 April 2009.\n\nThis work was supported in part by the US Office of Naval Research (Grant No. N00014-07-1-0304), the Australian Research Council's Discovery Projects funding scheme (Project No. DP0343094), EPSRC Grant No. EP/C546237/1,\nand the NSF under grant PHY-0803371. STF was supported by the Perimeter Institute\nfor Theoretical Physics; research at Perimeter is supported by the Government of\nCanada through Industry Canada and by the Province of Ontario through the Ministry of Research & Innovation.\n\n
Published - Boixo2009p8378Quantum_Communication_Measurement_And_Computing__Qcmc_.pdf
", "abstract": "Questions about quantum limits on measurement precision were once viewed from the perspective of how to reduce or avoid the effects of quantum noise. With the advent of quantum information science came a paradigm shift to proving rigorous bounds on measurement precision. These bounds have been interpreted as saying, first, that the best achievable sensitivity scales as 1/n, where n is the number of particles one has available for a measurement and, second, that the only way to achieve this Heisenberg-limited sensitivity is to use quantum entanglement. We review these results and show that using quadratic couplings of n particles to a parameter to be estimated, one can achieve sensitivities that scale as 1/n^2 if one uses entanglement, but even in the absence of any entanglement at any time during the measurement protocol, one can achieve a super-Heisenberg scaling of 1/n^(3/2)", "date": "2009-04-13", "date_type": "published", "publisher": "American Institute of Physics", "place_of_pub": "New York, NY", "pagerange": "427-432", "id_number": "CaltechAUTHORS:20100511-100311769", "isbn": "978-0-7354-0647-6", "book_title": "Quantum Communication, Measurement And Computing (QCMC): Ninth International Conference on QCMC Calgary (Canada), 19\u201324 August 2008", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100511-100311769", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "U. S. Office of Naval Research", "grant_number": "N00014-07-1-0304" }, { "agency": "Australian Research Council", "grant_number": "Project No. DP0343094" }, { "agency": "EPSRC", "grant_number": "EP/C546237/1" }, { "agency": "NSF", "grant_number": "PHY-0803371" }, { "agency": "Perimeter Institute for Theoretical Physics" }, { "agency": "Government of Canada through Industry Canada" }, { "agency": "Province of Ontario through the Ministry of Research & Innovation" } ] }, "doi": "10.1063/1.3131367", "primary_object": { "basename": "Boixo2009p8378Quantum_Communication_Measurement_And_Computing__Qcmc_.pdf", "url": "https://authors.library.caltech.edu/records/n94vk-jp965/files/Boixo2009p8378Quantum_Communication_Measurement_And_Computing__Qcmc_.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Boixo, Sergio; Datta, Animesh; et el." }, { "id": "https://authors.library.caltech.edu/records/g3nqn-hh475", "eprint_id": 18215, "eprint_status": "archive", "datestamp": "2023-08-21 21:13:37", "lastmod": "2024-01-12 23:39:26", "type": "book_section", "metadata_visibility": "show", "creators": { "items": [ { "id": "Boixo-S", "name": { "family": "Boixo", "given": "Sergio" } }, { "id": "Datta-A", "name": { "family": "Datta", "given": "Animesh" } }, { "id": "Davis-M-J", "name": { "family": "Davis", "given": "Matthew J." } }, { "id": "Flammia-S-T", "name": { "family": "Flammia", "given": "Steven T." } }, { "id": "Shaji-A", "name": { "family": "Shaji", "given": "Anil" } }, { "id": "Tacla-A-B", "name": { "family": "Tacla", "given": "Alexandre B." } }, { "id": "Caves-C-M", "name": { "family": "Caves", "given": "Carlton M." } } ] }, "title": "Quantum metrology with Bose-Einstein condensates", "ispublished": "unpub", "full_text_status": "public", "keywords": "quantum metrology; nonlinear interferometry; Bose-Einstein condensate", "note": "\u00a9 2009 American Institute of Physics.\n\nIssue Date: 13 April 2009.\n\nThis work was supported in part by the US Office of Naval Research (Grant No. N00014-07-1-0304), the Australian Research Council's Discovery Projects funding scheme (Project No. DP0343094), EPSRC Grant No. EP/C546237/1\nand the NSF under grant PHY-0803371. STF was supported by the Perimeter Institute for Theoretical Physics; research at Perimeter is supported by the Government of Canada through Industry Canada and by the Province of Ontario through the Ministry of Research & Innovation.\n\nPublished - Boixo2009p8261Quantum_Communication_Measurement_And_Computing__Qcmc_.pdf
", "abstract": "We show how a generalized quantum metrology protocol can be implemented in a two-mode Bose-Einstein condensate of n atoms, achieving a sensitivity that scales better than 1/n and approaches 1/n^(3/2) for appropriate design of the condensate.", "date": "2009-04-13", "date_type": "published", "publisher": "American Institute of Physics", "pagerange": "423-426", "id_number": "CaltechAUTHORS:20100510-121135555", "isbn": "9780735406476", "book_title": "QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC): Ninth International Conference on QCMC", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100510-121135555", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "U. S. Office of Naval Research", "grant_number": "N00014-07-1-0304" }, { "agency": "Australian Research Council", "grant_number": "DP0343094" }, { "agency": "EPSRC", "grant_number": "EP/C546237/1" }, { "agency": "NSF", "grant_number": "PHY-0803371" }, { "agency": "Perimeter Institute for Theoretical Physics" }, { "agency": "Government of Canada through Industry Canada" }, { "agency": "Province of Ontario through the Ministry of Research & Innovation" } ] }, "contributors": { "items": [ { "id": "Lvovsky-A", "name": { "family": "Lvovsky", "given": "Alexander" } } ] }, "doi": "10.1063/1.3131366", "primary_object": { "basename": "Boixo2009p8261Quantum_Communication_Measurement_And_Computing__Qcmc_.pdf", "url": "https://authors.library.caltech.edu/records/g3nqn-hh475/files/Boixo2009p8261Quantum_Communication_Measurement_And_Computing__Qcmc_.pdf" }, "resource_type": "book_section", "pub_year": "2009", "author_list": "Boixo, Sergio; Datta, Animesh; et el." } ]