Generating photon-added states without adding a photon

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1908.08028.pdf (1.15 MB)

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https://journals.aps.org/pra/abstract/10.1103/PhysRevA.100.043802

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https://doi.org/10.1103/PHYSREVA.100.043802
 http://hdl.handle.net/11603/16502

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UMBC Physics Department
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2019-10-02

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journal articles preprints
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Citation of Original Publication

Shringarpure, S.U.; Franson, J.D.; Generating photon-added states without adding a photon; PHYSICAL REVIEW A 100,4 (2019); https://journals.aps.org/pra/abstract/10.1103/PhysRevA.100.043802;

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©2019 American Physical Society APS

Subjects

quantum theory
quantum measurements
optics & lasers
quantum optics
quantum state engineering
quantum states of light
atomic, molecular & optical

Abstract

We show that a continuous range of nonclassical states of light can be generated using conditional measurements on the idler mode of an optical parametric amplifier. The output state is prepared by introducing a coherent state in the signal mode of the amplifier with a single photon in the idler mode, followed by a conditional measurement of a single photon in the output idler mode. By varying the gain of the amplifier, this approach can produce a coherent state, a photon-added state, a displaced number state, or a continuous range of other nonclassical states with intermediate properties. We note that this approach can generate a photon-added state even though the postselected amplifier does not add any photons to the signal or idler modes. The ability to generate a continuous range of nonclassical states may have practical applications in quantum information processing.