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arXiv · 1908.04456

Synthetic gauge field in a single optomechanical resonator

Yuan Chen·Yan-Lei Zhang·Zhen Shen·Chang-Ling Zou·Guang-Can Guo·Chun-Hua Dong
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Abstract

Synthetic gauge fields have recently emerged, arising in the context of quantum simulations, topological matter, and the protected transportation of excitations against defects. For example, an ultracold atom experiences a light-induced effective magnetic field when tunnelling in an optical lattice, and offering a platform to simulate the quantum Hall effect and topological insulators. Similarly, the magnetic field associated with photon transport between sites has been demonstrated in a coupled resonator array. Here, we report the first experimental demonstration of a synthetic gauge field in the virtual dimension of bosonic modes in a single optomechanical resonator. By employing degenerate clockwise (CW) and counter-clockwise (CCW) optical modes and a mechanical mode, a controllable synthetic gauge field is realized by tuning the phase of the driving lasers. The non-reciprocal conversion between the three modes is realized for different synthetic magnetic fluxes. As a proof-of-principle demonstration, we also show the dynamics of the system under a fast-varying synthetic gauge field. Our demonstration not only provides a versatile and controllable platform for studying synthetic gauge fields in high dimensions but also enables an exploration of ultra-fast gauge field tuning with a large dynamic range, which is restricted for a magnetic field.

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Yuan Chen, Yan-Lei Zhang, Zhen Shen, Chang-Ling Zou, Guang-Can Guo, Chun-Hua Dong. 2019-08-13. Synthetic gauge field in a single optomechanical resonator. https://doi.org/10.1103/physrevlett.126.123603

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