Feedback-induced nonlinearity and superconducting on-chip quantum optics
Zhong-Peng Liu, Hui Wang, Jing Zhang, Yu-xi Liu, Re-Bing Wu, Chun-Wen Li, Franco Nori
DOI 10.1103/PhysRevA.88.063851 · Physical Review A
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Abstract
Quantum coherent feedback has been proven to be an efficient way to tune the dynamics of quantum optical systems and, recently, those of solid-state quantum circuits. Here, inspired by the recent progress of quantum feedback experiments, especially those in mesoscopic circuits, we prove that superconducting circuit QED systems, shunted with a coherent feedback loop, can change the dynamics of a superconducting transmission line resonator, i.e., a linear quantum cavity, and lead to strong on-chip nonlinear optical phenomena. We find that bistability can occur under the semiclassical approximation and photon antibunching can be shown in the quantum regime. Our study presents alternate perspectives for engineering nonlinear quantum dynamics on a chip.
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