Quantum-circuit black hole lasers

Abstract A black hole laser in analogues of gravity amplifies Hawking radiation, which is unlikely to be measured real holes, and makes it observable. There have been proposals realize such lasers various systems. However, no progress has made electric circuits for a long time, despite their many advantages as high-precision electromagnetic wave detection. Here we propose Josephson transmission lines incorporating metamaterial elements capable producing Hawking-pair propagation modes Kerr nonlinearity due the nonlinear inductance. single dark soliton obeying Schrödinger equation produces hole-white horizon pair that acts cavity through change refractive index effect. We show resulting squeezed-state characterized by squeezing parameters. also evaluate degree quantum correlation between its partner radiations using entanglement entropy does not require simultaneous measurements them. As result, obtained depending on velocity provides strong evidence derived from radiation with generated production vacuum.