Multiport Homodyning for Reconstructing Multimode Quantum States of Light

  • H. Kühn
  • W. Vogel
  • D.-G. Welsch
Conference paper


It is well know that the quantum state of a single-mode radiation field can be reconstructed by optical tomography based on balanced homodyne four-port detection.1 Moreover, the measured distributions can be related to the density matrix in a field strength basis by a two-fold Fourier transformation.2 To reconstruct the quantum state of a correlated two-mode field,3 or even of a correlated N mode field, general methods of multiport homodyning are required.4


Quantum State Density Matrix Mode Field Local Oscillator Measured Distribution 
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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • H. Kühn
    • 1
  • W. Vogel
    • 2
  • D.-G. Welsch
    • 1
  1. 1.Theor.-Phys. Inst.Universität JenaJenaGermany
  2. 2.FB PhysikUniversität RostockRostockGermany

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