A limit formula for the quantum fidelity
classification
🪐 quant-ph
cond-mat.othermath-phmath.MPphysics.optics
keywords
quantumfidelityformulalimitstatestatesachievingapplication
read the original abstract
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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