Arbitrarily High Super-Resolving Phase Measurements at Telecommunication Wavelengths

Details Arbitrarily High Super-Resolving Phase Measurements at Telecommunication Wavelengths Arbitrarily High Super-Resolving Phase Measurements at Telecommunication Wavelengths

2010-04-20

arxiv.org/abs/1004.3414v1

Phys. Rev. A 81, 063836 (2010)

Physics

Quantum Physics

5 pages, 7 figures

Scientific paper

10.1103/PhysRevA.81.063836

We present two experiments that achieve phase super-resolution at telecommunication wavelengths. One of the experiments is realized in the space domain and the other in the time domain. Both experiments show high visibilities and are performed with standard lasers and single-photon detectors. The first experiment uses six-photon coincidences, whereas the latter needs no coincidence measurements, is easy to perform, and achieves, in principle, arbitrarily high phase super-resolution. Here, we demonstrate a 30-fold increase of the resolution. We stress that neither entanglement nor joint detection is needed in these experiments, demonstrating that neither is necessary to achieve phase super-resolution.

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