Interferometric detection of optical phase shifts at the Heisenberg limit

Details Interferometric detection of optical phase shifts at the Heisenberg limit Interferometric detection of optical phase shifts at the Heisenberg limit

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvl..71.1355h&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 71, no. 9, p. 1355-1358.

Physics

258

Heisenberg Theory, Mach-Zehnder Interferometers, Phase Shift, Photons, Quantum Theory, Beam Splitters, Light Transmission, Optical Paths, Sensitivity, Quantum Fluctuations, Quantum Noise, And Quantum Jumps, Interferometers, Nonclassical States Of The Electromagnetic Field, Including Entangled Photon States, Quantum State Engineering And Measurements

Scientific paper

We show that the uncertainty in the relative quantum phase of two fields propagating in the arms of a Mach-Zehnder interferometer can be reduced to the Heisenberg limit by driving the interferometer with two Fock states containing equal numbers of photons. This leads to a minimum detectable phase shift far below that of any interferometer driven by a coherent light source.

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