Tilted phase space measurements

Details Tilted phase space measurements Tilted phase space measurements

2010-09-21

arxiv.org/abs/1009.4054v1

Phys. Rev. A 82, 052121 (2010)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

We show that the phase shift of {\pi}/2 is crucial for the phase space translation covariance of the measured high-amplitude limit observable in eight-port homodyne detection. However, for an arbitrary phase shift {\theta} we construct explicitly a different nonequivalent projective representation of R$^2$ such that the observable is covariant with respect to this representation. As a result we are able to determine the measured observable for an arbitrary parameter field and phase shift. Geometrically the change in the phase shift corresponds to the tilting of one axis in the phase space of the system.

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