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arXiv · 1709.09091

Enhancing cavity QED via anti-squeezing: synthetic ultra-strong coupling

C. Leroux·L. C. G. Govia·A. A. Clerk
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Abstract

We present and analyze a method where parametric (two-photon) driving of a cavity is used to exponentially enhance the light-matter coupling in a generic cavity QED setup, with time-dependent control. Our method allows one to enhance weak-coupling systems, such that they enter the strong coupling regime (where the coupling exceeds dissipative rates) and even the ultra-strong coupling regime (where the coupling is comparable to the cavity frequency). As an example, we show how the scheme allows one to use a weak-coupling system to adiabatically prepare the highly entangled ground state of the ultra-strong coupling system. The resulting state could be used for remote entanglement applications.

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C. Leroux, L. C. G. Govia, A. A. Clerk. 2017-09-26. Enhancing cavity QED via anti-squeezing: synthetic ultra-strong coupling. https://doi.org/10.1103/physrevlett.120.093602

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