Regular and bistable steady-state superradiant phases of an atomic beam traversing an optical cavity
| Autor: | Simon B. Jäger, Murray Holland, Haonan Liu, Athreya Shankar, J. Cooper |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Quantum Physics Bistability Phase (waves) Resonance FOS: Physical sciences Physics::Optics Superradiance 01 natural sciences Collimated light 3. Good health 010305 fluids & plasmas law.invention Laser linewidth law Optical cavity 0103 physical sciences Physics::Accelerator Physics Spontaneous emission Physics::Atomic Physics Atomic physics 010306 general physics Quantum Physics (quant-ph) |
| Popis: | We investigate the different photon emission regimes created by a preexcited and collimated atomic beam passing through a single mode of an optical cavity. In the regime where the cavity degrees of freedom can be adiabatically eliminated, we find that the atoms undergo superradiant emission when the collective linewidth exceeds the transit-time broadening. We analyze the case where the atomic beam direction is slanted with respect to the cavity axis. For this situation, we find that a phase of continuous light emission similar to steady-state superradiance is established providing the tilt of the atomic beam is sufficiently small. However, if the atoms travel more than half a wavelength along the cavity axis during one transit time we predict a dynamical phase transition to a new bistable superradiant regime. In this phase the atoms undergo collective spontaneous emission with a frequency that can be either blue or red detuned from the free-space atomic resonance. We analyze the different superradiant regimes and the quantum critical crossover boundaries. In particular we find the spectrum of the emitted light and show that the linewidth exhibits features of a critical scaling close to the phase boundaries. 13 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|