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Optica Publishing Group
  • International Quantum Electronics Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper TuL35

Loss-error compensation in quantum-state measurements

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Abstract

Recently the measurement of the quantum state of light by means of balanced homodyne tomography has become a matter of large interest [1]. Due to non-unit quantum efficiencies of the photodetectors and other detection losses, errors are produced in the results of any measurement of the state of the field. These errors have to be compensated by applying an additional mathematical procedure after the measurement has been performed. Previous loss-error compensation formulae [2,3] are only applicable for arbitrary fields when the overall detection efficiency η exceeds the value η = 0.5. In contrast to this we develop a compensation procedure that works for any value of η.

© 1996 Optical Society of America

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