Quantum metrology with a non-linear kicked Mach-Zehnder interferometer
- URL: http://arxiv.org/abs/2201.12255v1
- Date: Fri, 28 Jan 2022 17:12:05 GMT
- Title: Quantum metrology with a non-linear kicked Mach-Zehnder interferometer
- Authors: Sabrina M\"uller and Daniel Braun
- Abstract summary: We study the sensitivity of a Mach-Zehnder interferometer that contains in addition to the phase shifter a non-linear element.
By including both elements in a cavity or a loop that the light transverses many times, a non-linear kicked version of the interferometer arises.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study the sensitivity of a Mach-Zehnder interferometer that contains in
addition to the phase shifter a non-linear element. By including both elements
in a cavity or a loop that the light transverses many times, a non-linear
kicked version of the interferometer arises. We study its sensitivity as
function of the phase shift, the kicking strength, the maximally reached
average number of photons, and damping due to photon loss for an initial
coherent state. We find that for vanishing damping Heisenberg-limited scaling
of the sensitivity arises if squeezing dominates the total photon number. For
small to moderate damping rates the non-linear kicks can considerably increase
the sensitivity as measured by the quantum Fisher information per unit time.
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