Simultaneous quantumstate measurements using array detection
Abstract
We have simultaneously measured the quantum states of two different spatial modes of the same optical beam by performing quantumstate tomography with an array detector. Both modes are well described by coherent states, but the projection of the signal onto the local oscillator mode contains a mean of 0.09 photons, while a more complicated mode has a mean of 4.3 photons. This demonstrates that for this particular mode the effective detection efficiency when using array detection is over 40 times greater than when using single detectors.
 Publication:

Physical Review A
 Pub Date:
 April 2001
 DOI:
 10.1103/PhysRevA.63.040101
 Bibcode:
 2001PhRvA..63d0101D
 Keywords:

 03.65.Wj;
 03.65.Ta;
 42.50.Ar;
 State reconstruction quantum tomography;
 Foundations of quantum mechanics;
 measurement theory;
 Photon statistics and coherence theory