Distinguishing two single-mode Gaussian states by homodyne detection: An information-theoretic approach

Details Distinguishing two single-mode Gaussian states by homodyne detection: An information-theoretic approach Distinguishing two single-mode Gaussian states by homodyne detection: An information-theoretic approach

2004-10-14

arxiv.org/abs/quant-ph/0410111v2

Phys. Rev. A 71, 032336 (2005)

Physics

Quantum Physics

6 pages, 4 figures, published version with a detailed discussion

Scientific paper

10.1103/PhysRevA.71.032336

It is known that the quantum fidelity, as a measure of the closeness of two quantum states, is operationally equivalent to the minimal overlap of the probability distributions of the two states over all possible POVMs; the POVM realizing the minimum is optimal. We consider the ability of homodyne detection to distinguish two single-mode Gaussian states, and investigate to what extent it is optimal in this information-theoretic sense. We completely identify the conditions under which homodyne detection makes an optimal distinction between two single-mode Gaussian states of the same mean, and show that if the Gaussian states are pure, they are always optimally distinguished.

Affiliated with

Also associated with

No associations

Rating

Distinguishing two single-mode Gaussian states by homodyne detection: An information-theoretic approach does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Distinguishing two single-mode Gaussian states by homodyne detection: An information-theoretic approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distinguishing two single-mode Gaussian states by homodyne detection: An information-theoretic approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-664787