Hidden PT symmetry and quantization of a coupled-oscillator model of quantum amplification by superradiant emission of radiation Academic Article uri icon

abstract

  • 2017 American Physical Society. With Maxwell-Bloch equations how the superradiance can lead to amplification and gain at a frequency much larger than the pumping frequency has been shown. This remarkable effect has been examined in terms of a simpler model involving two coupled oscillators, with one of them parametrically driven. We show that this coupled-oscillator model has a hidden parity-time (PT) symmetry for quantum amplification by superradiant emission of radiation (QASER); we thus bring PT symmetry to the realm of parametrically coupled resonators. Moreover, we find that the QASER gain arises from the broken-PT-symmetry phase. We then quantize the simplified version of QASER using quantum Langevin equations. The quantum description enables us to understand how the system starts from quantum fluctuations.

published proceedings

  • PHYSICAL REVIEW A

altmetric score

  • 0.75

author list (cited authors)

  • Zhang, L., Agarwal, G. S., Schleich, W. P., & Scully, M. O.

citation count

  • 10

complete list of authors

  • Zhang, Lida||Agarwal, GS||Schleich, WP||Scully, MO

publication date

  • July 2017