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arXiv · 2107.04040

Fermionization via cavity-assisted infinite-range interactions

Paolo Molignini·Camille Lévêque·Hans Kessler·Dieter Jaksch·R. Chitra·Axel U. J. Lode
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Abstract

We study a one-dimensional array of bosons with infinite-range interactions mediated by a laser-driven dissipative optical cavity. The cavity-mediated infinite-range interactions open up a new pathway to fermionization, hitherto only known for dipolar bosons due to their long-range interactions. In parameter ranges attainable in state-of-the-art experiments, we systematically compare observables for bosons and fermions with infinite-range interactions. At large enough laser pump power, many observables, including density distributions in real and momentum space, correlation functions, eigenvalues of the one-body density matrix, and superradiance order parameter, become identical for bosons and fermions. We map out the emergence of this cavity-induced fermionization as a function of pump power and contact interactions. We discover that cavity-mediated interactions can compensate a reduction by several orders of magnitude in the strength of the contact interactions needed to trigger fermionization.

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Paolo Molignini, Camille Lévêque, Hans Kessler, Dieter Jaksch, R. Chitra, Axel U. J. Lode. 2021-07-08. Fermionization via cavity-assisted infinite-range interactions. https://doi.org/10.1103/physreva.106.l011701

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