In-Situ absolute phase detection of a microwave field via incoherent fluorescence

Details In-Situ absolute phase detection of a microwave field via incoherent fluorescence In-Situ absolute phase detection of a microwave field via incoherent fluorescence

2004-10-27

arxiv.org/abs/quant-ph/0410219v1

Phys. Rev. A 71, 063408 (2005)

Physics

Quantum Physics

13 pages, 5 figures

Scientific paper

10.1103/PhysRevA.71.063408

Measuring the amplitude and the absolute phase of a monochromatic microwave field at a specific point of space and time has many potential applications, including precise qubit rotations and wavelength quantum teleportation. Here we show how such a measurement can indeed be made using resonant atomic probes, via detection of incoherent fluorescence induced by a laser beam. This measurement is possible due to self-interference effects between the positive and negative frequency components of the field. In effect, the small cluster of atoms here act as a highly localized pick-up coil, and the fluorescence channel acts as a transmission line.

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