APS » PROLA » Phys. Rev. Lett. » Volume 79 » Issue 24

Phys. Rev. Lett. 79, 4724 - 4727 (1997)

Measuring the State of a Bosonic Two-Mode Quantum Field

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R. Walser
JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440

Received 28 May 1997

A measurement scheme is proposed to determine the state of a bosonic two-mode system completely. Without relying on the existence of a reference field, we reconstruct the quantum state from joint number measurement only, in case [ρ,N-^ tot]  =  0. Based on an analogy to angular momentum, we have obtained an explicit inversion procedure for the density matrix of the system and discuss its application.


©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v79/p4724
DOI: 10.1103/PhysRevLett.79.4724
PACS: 03.75.Be, 05.30.Jp, 42.50.-p

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