"Photonic" Cat States from Strongly Interacting Matter Waves

Physical Review Letters
Uwe R Fischer, Myung-Kyun Kang

Abstract

We consider ultracold quantum gases of scalar bosons residing in a coupling strength-density regime in which they constitute a twofold fragmented condensate trapped in a single well. It is shown that the corresponding quantum states are, in the appropriate Fock space basis, identical to the photon cat states familiar in quantum optics, which correspond to superpositions of coherent states of the light field with a phase difference of π. In marked distinction to photon cat states, however, the very existence of matter-wave cat states crucially depends on the many-body correlations of the constituent bosons. We consequently establish that the quadratures of the effective "photons," expressing the highly nonclassical nature of the macroscopic matter-wave superposition state, can be experimentally accessed by measuring the density-density correlations of the interacting quantum gas.

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May 18, 2013·Physical Review Letters·Stefan Nimmrichter, Klaus Hornberger

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Citations

Sep 28, 2017·Physical Review Letters·Borivoje Dakić, Milan Radonjić
Sep 7, 2019·Physical Review Letters·Ze-Pei CianMohammad Hafezi
Apr 13, 2019·Physical Review Letters·José LebreuillyChristophe Mora
May 23, 2020·Physical Review Letters·Obinna AbahMauro Paternostro

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