A limit formula for the quantum fidelity

Details A limit formula for the quantum fidelity A limit formula for the quantum fidelity

2012-04-11

arxiv.org/abs/1204.2473v1

Physics

Quantum Physics

7 pages. REVTeX

Scientific paper

Quantum fidelity is a central tool in quantum information, quantifying how much two quantum states are similar. Here we propose a limit formula for the quantum fidelity between a mixed state and a pure state. As an example of an application, we apply this formula to the case of multimode Gaussian states, achieving a simple expression in terms of their first and second-order statistical moments.

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