Noise refocusing in a five-blade neutron interferometer
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We provide a quantum information description of a proposed five-blade neutron interferometer geometry and show that it is robust against low-frequency mechanical vibrations and dephasing due to the dynamical phase. The extent to which the dynamical phase affects the contrast in a neutron interferometer is experimentally shown. In our model, we consider the coherent evolution of a neutron wavepacket in an interferometer crystal blade and simulate the effect of mechanical vibrations and momentum spread of the neutron through the interferometer. The standard three-blade neutron interferometer is shown to be immune to dynamical phase noise but prone to noise from mechanical vibrations, and the decoherence free subspace four-blade neutron interferometer is shown to be immune to mechanical vibration noise but prone to noise from the dynamical phase. Here, we propose a five-blade neutron interferometer and show that it is immune to both low-frequency mechanical vibration noise and dynamical phase noise.
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Joachim Nsofini, Dusan Sarenac, Kamyar Ghofrani, Michael G. Huber, Muhammad Arif, David G. Cory, Dimitry A. Pushin (2017). Noise refocusing in a five-blade neutron interferometer. UWSpace. http://hdl.handle.net/10012/13801