Photon Added Detection

Details Photon Added Detection Photon Added Detection

2003-05-30

arxiv.org/abs/quant-ph/0305185v1

Phys. Rev. A 68, 043821 (2003)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.68.043821

The production of conditional quantum states and quantum operations based on the result of measurement is now seen as a key tool in quantum information and metrology. We propose a new type of photon number detector. It functions non-deterministically, but when successful, it has high fidelity. The detector, which makes use of an n-photon auxiliary Fock state and high efficiency Homodyne detection, allows a tunable tradeoff between fidelity and probability. By sacrificing probability of operation, an excellent approximation to a photon number detector is achieved.

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