Simultaneous quantum-state measurements using array detection
- 19 March 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 63 (4) , 040101
- https://doi.org/10.1103/physreva.63.040101
Abstract
We have simultaneously measured the quantum states of two different spatial modes of the same optical beam by performing quantum-state 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.Keywords
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