Adaptive Phase Measurements: Going Beyond the Marginal Q Distribution

  • H. M. Wiseman
Conference paper


It is now generally accepted that there is a unique well-defined quantum probability distribution for the phase of an arbitrary state of a single mode of the electromagnetic field, which can be known as the canonical phase distribution1:
$$ {P_{canonical}}\left( \phi \right) = Tr\left[ {\rho {{\hat F}_{canonical}}\left( \phi \right)} \right].{\hat F_{canonical}}\left( \phi \right) = \frac{1}{{2\pi }}\left| \phi \right\rangle \langle \phi |.\left| \phi \right\rangle = \sum\limits_{n = 0}^\infty {{e^{in\phi }}} \left| \phi \right\rangle $$


Coherent State Phase Measurement Arbitrary State Quantum Trajectory Linear Quantum 
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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • H. M. Wiseman
    • 1
  1. 1.Physics DepartmentThe University of AucklandAucklandNew Zealand

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