Cavity-immune features in the spectra of superradiant crossover laser pulses

• URL: http://arxiv.org/abs/2104.13305v2
• Date: Wed, 19 May 2021 11:59:34 GMT
• Title: Cavity-immune features in the spectra of superradiant crossover laser pulses
• Authors: Mikkel Tang (1), Stefan A. Sch\"affer (2), Asbj{\o}rn A. J{\o}rgensen (1), Martin R. Henriksen (1), Bjarke T. R. Christensen (1), J\"org H. M\"uller (1) and Jan W. Thomsen (1) ((1) Niels Bohr Institute, Copenhagen, Denmark, (2) Van der Waals-Zeeman Institute, Amsterdam, The Netherlands)
• Abstract summary: Lasing in the bad cavity regime has promising applications in precision metrology due to the reduced sensitivity to cavity noise. We find that by detuning the cavity resonance, the influence of the cavity noise on the peak lasing frequency can be eliminated to first order. Experimental results are compared to a model based on a Tavis-Cummings Hamiltonian, which enables us to investigate the interplay between different thermal velocity classes.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Lasing in the bad cavity regime has promising applications in precision metrology due to the reduced sensitivity to cavity noise. Here we investigate the spectral properties and phase behavior of pulsed lasing on the $^1$S$_0 - ^3$P$_1$ line of $^{88}$Sr in a mK thermal ensemble, as first described in arxiv:1903.12593. The system operates in a regime where the Doppler-broadened atomic transition linewidth is several times larger than the cavity linewidth. We find that by detuning the cavity resonance, the influence of the cavity noise on the peak lasing frequency can be eliminated to first order despite the system not being deep in the bad cavity regime. Experimental results are compared to a model based on a Tavis-Cummings Hamiltonian, which enables us to investigate the interplay between different thermal velocity classes as the underlying mechanism for the reduction in cavity noise. These velocity-dependent dynamics can occur in pulsed lasing and during the turn-on behavior of lasers in the superradiant crossover regime.

Related papers

• Room-temperature quantum optomechanics using an ultra-low noise cavity [0.0]
  We demonstrate optomechanical squeezing at room temperature in a phononic-engineered membrane-in-the-middle system. By using a high finesse cavity whose mirrors are patterned with phononic crystal structures, we reduce cavity frequency noise by more than 700-fold. These advances enable operation within a factor of 2.5 of the Heisenberg limit, leading to squeezing of the probing field by 1.09 dB below the vacuum fluctuations.
  arXiv  Detail & Related papers  (2023-09-26T16:27:32Z)
• Thermal intermodulation backaction in a high-cooperativity optomechanical system [0.0]
  An important example is thermal intermodulation noise (TIN), a form of excess optical noise produced by mixing of thermal noise peaks. Our results suggest that mitigating TIN may be critical to reaching the quantum regime from room temperature in a variety of contemporary optomechanical systems.
  arXiv  Detail & Related papers  (2023-07-06T21:42:18Z)
• Gain assisted controllable fast light generation in cavity magnomechanics [0.0]
  controllable output field generation from a cavity magnomechanical resonator system. tuning the exchange interaction strength between the two resonators leads to the system's effective gain and dispersive response.
  arXiv  Detail & Related papers  (2023-06-07T12:42:26Z)
• A driven quantum superconducting circuit with multiple tunable degeneracies [0.0]
  We present the experimental discovery of multiple simultaneous degeneracies in the spectrum of a Kerr oscillator subjected to a squeezing drive. Remarkably, these degeneracies can be turned on-and-off on demand, and their number is tunable.
  arXiv  Detail & Related papers  (2022-11-08T23:15:29Z)
• Photon generation and entanglement in a double superconducting cavity [105.54048699217668]
  We study the dynamical Casimir effect in a double superconducting cavity in a quantum electrodynamics architecture. We study the creation of photons when the walls oscillate harmonically with a small amplitude.
  arXiv  Detail & Related papers  (2022-07-18T16:43:47Z)
• Stabilizing and improving qubit coherence by engineering noise spectrum of two-level systems [52.77024349608834]
  Superconducting circuits are a leading platform for quantum computing. Charge fluctuators inside amorphous oxide layers contribute to both low-frequency $1/f$ charge noise and high-frequency dielectric loss. We propose to mitigate those harmful effects by engineering the relevant TLS noise spectral densities.
  arXiv  Detail & Related papers  (2022-06-21T18:37:38Z)
• Frequency fluctuations of ferromagnetic resonances at milliKelvin temperatures [50.591267188664666]
  Noise is detrimental to device performance, especially for quantum coherent circuits. Recent efforts have demonstrated routes to utilizing magnon systems for quantum technologies, which are based on single magnons to superconducting qubits. Researching the temporal behavior can help to identify the underlying noise sources.
  arXiv  Detail & Related papers  (2021-07-14T08:00:37Z)
• Tunable Anderson Localization of Dark States [146.2730735143614]
  We experimentally study Anderson localization in a superconducting waveguide quantum electrodynamics system. We observe an exponential suppression of the transmission coefficient in the vicinity of its subradiant dark modes. The experiment opens the door to the study of various localization phenomena on a new platform.
  arXiv  Detail & Related papers  (2021-05-25T07:52:52Z)
• Effect of phonons on the electron spin resonance absorption spectrum [62.997667081978825]
  We model the effect of phonons and temperature on the electron spin resonance (ESR) signal in magnetically active systems. We find that the suppression of ESR signals is due to phonon broadening but not based on the common assumption of orbital quenching.
  arXiv  Detail & Related papers  (2020-04-22T01:13:07Z)
• Thermal intermodulation noise in cavity-based measurements [0.0]
  We show that nonlinearly transduced thermal fluctuations of cavity frequency can dominate the broadband noise in photodetection. We report and characterize thermal intermodulation noise in an optomechanical cavity, where the frequency fluctuations are caused by mechanical Brownian motion.
  arXiv  Detail & Related papers  (2020-04-12T21:24:23Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.