Nondemolition measurement of the vacuum state or its complement

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Oi, Daniel K. L. and Potocek, Vaclav and Jeffers, John (2013) Nondemolition measurement of the vacuum state or its complement. Physical Review Letters, 110 (21). 210504. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.110.210504)

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Abstract

Measurement is integral to quantum information processing and communication; it is how information encoded in the state of a system is transformed into classical signals for further use. In quantum optics, measurements are typically destructive, so that the state is not available afterwards for further steps. Here we show how to measure the presence or absence of the vacuum in a quantum optical field without destroying the state, implementing the ideal projections onto the respective subspaces. This not only enables sequential measurements, useful for quantum communication, but it can also be adapted to create novel states of light via bare raising and lowering operators.

ORCID iDs

Oi, Daniel K. L. ORCID logoORCID: https://orcid.org/0000-0003-0965-9509, Potocek, Vaclav and Jeffers, John ORCID logoORCID: https://orcid.org/0000-0002-8573-1675;
  • Item type:Article
    ID code:44519
    Dates:
    Date
    Event
    23 May 2013
    Published
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:21 Aug 2013 15:52
    Last modified:09 May 2025 20:32
    URI:https://strathprints.strath.ac.uk/id/eprint/44519
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