Quantum state reconstruction of spectral field modes: Homodyne and resonator detection schemes
Abstract
We revisit the problem of quantum state reconstruction of light beams from the photocurrent quantum noise. As is well known, but often overlooked, two longitudinal field modes contribute to each spectral component of the photocurrent (sideband modes). We show that spectral homodyne detection is intrinsically incapable of providing all the information needed for the full reconstruction of the twomode spectral quantum state. Such a limitation is overcome by the technique of resonator detection. A detailed theoretical description and comparison of both methods is presented, as well as an experiment to measure the sixmode quantum state of pumpsignalidler beams of an optical parametric oscillator above the oscillation threshold.
 Publication:

Physical Review A
 Pub Date:
 November 2013
 DOI:
 10.1103/PhysRevA.88.052113
 arXiv:
 arXiv:1310.2427
 Bibcode:
 2013PhRvA..88e2113B
 Keywords:

 03.65.Wj;
 42.50.Lc;
 03.65.Ta;
 03.65.Sq;
 State reconstruction quantum tomography;
 Quantum fluctuations quantum noise and quantum jumps;
 Foundations of quantum mechanics;
 measurement theory;
 Semiclassical theories and applications;
 Quantum Physics
 EPrint:
 16 pages, 10 figures