Direct measurement of the Wigner function by photon counting

Abstract

We report a direct measurement of the Wigner function characterizing the quantum state of a light mode. The experimental scheme is based on the representation of the Wigner function as an expectation value of a displaced photon number parity operator. This allowed us to scan the phase space point-by-point, and obtain the complete Wigner function without using any numerical reconstruction algorithms.

4 pages, REVTeX

References in corpus (1)

• Quantum Nonlocality in Phase Space

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