Shaping the Phase of a Single Photon

Details Shaping the Phase of a Single Photon Shaping the Phase of a Single Photon

2009-05-28

arxiv.org/abs/0905.4583v1

Nature Photonics 3, 469 (2009)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1038/nphoton.2009.115

While the phase of a coherent light field can be precisely known, the phase of the individual photons that create this field, considered individually, cannot. Phase changes within single-photon wave packets, however, have observable effects. In fact, actively controlling the phase of individual photons has been identified as a powerful resource for quantum communication protocols. Here we demonstrate the arbitrary phase control of a single photon. The phase modulation is applied without affecting the photon's amplitude profile and is verified via a two-photon quantum interference measurement, which can result in the fermionic spatial behaviour of photon pairs. Combined with previously demonstrated control of a single photon's amplitude, frequency, and polarisation, the fully deterministic phase shaping presented here allows for the complete control of single-photon wave packets.

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