Parallel interaction-free measurement using spatial adiabatic passage

Details Parallel interaction-free measurement using spatial adiabatic passage Parallel interaction-free measurement using spatial adiabatic passage

2011-05-27

arxiv.org/abs/1105.5480v1

Physics

Quantum Physics

12 pages, 5 figures

Scientific paper

Interaction-free measurement is a surprising consequence of quantum interference, where the presence of objects can be sensed without any disturbance of the object being measured. Here we show an extension of interaction-free measurement using techniques from spatial adiabatic passage, specifically multiple reciever adiabatic passage. Due to subtle properties of the adiabatic passage, it is possible image an object without interaction between the imaging photons and the sample. The technique can be used on multiple objects in parallel, and is entirely deterministic in the adiabatic limit. Unlike more conventional interaction-free measurement schemes, this adiabatic process is driven by the symmetry of the system, and not by more usual interference effects. As such it provides an interesting alternative quantum protocol which may be applicable to photonic implementations of spatial adiabatic passage. We also show that this scheme can be used to implement a collision-free quantum routing protocol.

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