2016/07/13 by Christin Rhén, Rhén, Christin, Andreas Isacsson +1
Physics and Astronomy · Engineering · #Mechanical and Optical Resonators #Quantum and electron transport phenomena #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.1607.03804
The harmonic oscillator is one of the most widely used model systems in\nphysics: an indispensable theoretical tool in a variety of fields. It is well\nknown that otherwise linear oscillators can attain novel and nonlinear features\nthrough interaction with another dynamical system. We investigate such an\ninteracting system: a superconducting LC-circuit dispersively coupled to a\nsuperconducting quantum interference device (SQUID). We find that the SQUID\nphase behaves as a classical two-level system, whose two states correspond to\none linear and one nonlinear regime for the LC-resonator. As a result, the\ncircuit's response to forcing can become multistable. The strength of the\nnonlinearity is tuned by the level of noise in the system, and increases with\ndecreasing noise. This tunable nonlinearity could potentially find application\nin the field of sensitive detection, whereas increased understanding of the\nclassical harmonic oscillator is relevant for studies of the\nquantum-to-classical crossover of Jaynes-Cummings systems.\n