Upper bounds on success probabilities in linear optics

Scheel, S; Lutkenhaus, N

doi:10.1088/1367-2630/6/1/051

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Upper bounds on success probabilities in linear optics

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Lutkenhaus, N
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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引用

Scheel, S., & Lutkenhaus, N. (2004). Upper bounds on success probabilities in linear optics. NEW JOURNAL OF PHYSICS, 6:. doi:10.1088/1367-2630/6/1/051.

引用: https://hdl.handle.net/11858/00-001M-0000-002D-6DE8-6

要旨

We develop an abstract way of de. ning linear-optics networks designed to perform quantum information tasks such as quantum gates. We will be mainly concerned with the non-linear sign shift (NSS) gate, but it will become obvious that all other gates can be treated in a similar manner. The abstract scheme is extremely well suited for analytical as well as numerical investigations since it reduces the number of parameters for a general setting. With that, we show numerically and partially analytically for a wide class of states that the success probability of generating a NSS gate does not exceed 1/4, which to our knowledge is the strongest bound to date.