[
    {
        "id": "authors:g3nqn-hh475",
        "collection": "authors",
        "collection_id": "g3nqn-hh475",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100510-121135555",
        "type": "book_section",
        "title": "Quantum metrology with Bose-Einstein condensates",
        "book_title": "QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC): Ninth International Conference on QCMC",
        "author": [
            {
                "family_name": "Boixo",
                "given_name": "Sergio",
                "clpid": "Boixo-S"
            },
            {
                "family_name": "Datta",
                "given_name": "Animesh",
                "clpid": "Datta-A"
            },
            {
                "family_name": "Davis",
                "given_name": "Matthew J.",
                "clpid": "Davis-M-J"
            },
            {
                "family_name": "Flammia",
                "given_name": "Steven T.",
                "clpid": "Flammia-S-T"
            },
            {
                "family_name": "Shaji",
                "given_name": "Anil",
                "clpid": "Shaji-A"
            },
            {
                "family_name": "Tacla",
                "given_name": "Alexandre B.",
                "clpid": "Tacla-A-B"
            },
            {
                "family_name": "Caves",
                "given_name": "Carlton M.",
                "clpid": "Caves-C-M"
            }
        ],
        "contributor": [
            {
                "family_name": "Lvovsky",
                "given_name": "Alexander",
                "clpid": "Lvovsky-A"
            }
        ],
        "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.",
        "doi": "10.1063/1.3131366",
        "isbn": "9780735406476",
        "publisher": "American Institute of Physics",
        "publication_date": "2009-04-13",
        "pages": "423-426"
    },
    {
        "id": "authors:n94vk-jp965",
        "collection": "authors",
        "collection_id": "n94vk-jp965",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100511-100311769",
        "type": "book_section",
        "title": "Quantum metrology from an information theory perspective",
        "book_title": "Quantum Communication, Measurement And Computing (QCMC): Ninth International Conference on QCMC  Calgary (Canada), 19\u201324 August 2008",
        "author": [
            {
                "family_name": "Boixo",
                "given_name": "Sergio",
                "clpid": "Boixo-S"
            },
            {
                "family_name": "Datta",
                "given_name": "Animesh",
                "clpid": "Datta-A"
            },
            {
                "family_name": "Davis",
                "given_name": "Matthew J.",
                "clpid": "Davis-M-J"
            },
            {
                "family_name": "Flammia",
                "given_name": "Steven T.",
                "clpid": "Flammia-S-T"
            },
            {
                "family_name": "Shaji",
                "given_name": "Anil",
                "clpid": "Shaji-A"
            },
            {
                "family_name": "Tacla",
                "given_name": "Alexandre B.",
                "clpid": "Tacla-A-B"
            },
            {
                "family_name": "Caves",
                "given_name": "Carlton M.",
                "clpid": "Caves-C-M"
            }
        ],
        "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)",
        "doi": "10.1063/1.3131367",
        "isbn": "978-0-7354-0647-6",
        "publisher": "American Institute of Physics",
        "place_of_publication": "New York, NY",
        "publication_date": "2009-04-13",
        "pages": "427-432"
    }
]