Coherence-Assisted Superradiant Laser with Hz Linewidth and $10^{-10}$W Power

• URL: http://arxiv.org/abs/2211.06867v1
• Date: Sun, 13 Nov 2022 10:06:24 GMT
• Title: Coherence-Assisted Superradiant Laser with Hz Linewidth and $10^{-10}$W Power
• Authors: Guohui Dong, Yao Yao, Peng Zhang, and Dazhi Xu
• Abstract summary: We propose an alternative superradiant laser scheme based on a Raman-transition-induced coupling. The coherence between the dark and bright states induced by the Raman beams produce a new local minimum in the pumping-linewidth curve. Our work greatly improves the output performance of the superradiant laser system with coherence induced by Raman transitions.
• Score: 5.332466021162516
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The superradiant laser, based on the clock transition between the electric ground state $^1$S$_0$ and the metastable state $^3$P$_0$ of fermionic alkaline-earth(-like) atoms, has been proposed to be a new promising light source with linewidth being the order of millihertz. However, due to the small $^1$S$_0$-to-$^3$P$_0$ transition strength, the steady-state power in that system is relatively low ($\sim 10^{-12}$W). In this work, we propose an alternative superradiant laser scheme based on a Raman-transition-induced coupling between the $^3$P$_0$ and $^3$P$_1$ states in bosonic alkaline-earth(-like) atoms, and achieve a laser with linewidth $\lesssim 2\pi\times1$Hz and power $\gtrsim 10^{-10}$W ($\sim 10^{3}$ photons in steady state) at a small pumping cost. The Raman beams play two significant roles in our scheme. First, the coherence between the dark and bright states induced by the Raman beams produce a new local minimum in the pumping-linewidth curve with pumping rate lower than $2\pi \times 10$kHz, which is beneficial for continuous output. Second, the Raman beams mix the long-lived $^3$P$_0$ state into the lasing state and thus reduce the linewidth. Our work greatly improves the output performance of the superradiant laser system with coherence induced by Raman transitions and may offer a firm foundation for its practical use in future.

Related papers

• Numerical analysis of a three-wave-mixing Josephson traveling-wave parametric amplifier with engineered dispersion loadings [62.997667081978825]
  Recently proposed Josephson traveling-wave parametric amplifier has great potential in achieving a gain of 20 dB and a flat bandwidth of at least 4 GHz. We model the advanced JTWPA circuit with periodic modulation of the circuit parameters. engineered dispersion loadings allow achieving sufficiently wide $3$ dB-bandwidth from $3$ GHz to $9$ GHz combined with a reasonably small ripple.
  arXiv  Detail & Related papers  (2022-09-22T14:46:04Z)
• On parametric resonance in the laser action [91.3755431537592]
  We consider the selfconsistent semiclassical Maxwell--Schr"odinger system for the solid state laser. We introduce the corresponding Poincar'e map $P$ and consider the differential $DP(Y0)$ at suitable stationary state $Y0$.
  arXiv  Detail & Related papers  (2022-08-22T09:43:57Z)
• Rapid generation of all-optical $^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance [58.720142291102135]
  We investigate the production of all-optical $39$K Bose-Einstein condensates with different scattering lengths using a Feshbach resonance near $33$ G. We are able to produce fully condensed ensembles with $5.8times104$ atoms within $850$ ms evaporation time at a scattering length of $232. Based on our findings we describe routes towards high-flux sources of ultra-cold potassium for inertial sensing.
  arXiv  Detail & Related papers  (2022-01-12T16:39:32Z)
• Prospects of a superradiant laser based on a thermal or guided beam of Sr-88 [0.0]
  The prospects of superradiant lasing on the 7.5 kHz wide are explored using numerical simulations. We find that the hot beam system achieves lasing above a flux of $2.5 times 1012$ atoms/s. We find that the output power is on the order of hundreds of pW, however the second order Doppler shift can be neglected.
  arXiv  Detail & Related papers  (2021-12-31T12:51:55Z)
• High-fidelity indirect readout of trapped-ion hyperfine qubits [0.0]
  We show a protocol for high-fidelity indirect readout of trapped ion hyperfine qubits using laser-driven Raman transitions. We demonstrate combined readout and back-action errors for the two subspaces of $1.2+1.1_-0.6 times 10-4$ and $0+1.9_-0 times 10-5$ with 68% confidence.
  arXiv  Detail & Related papers  (2021-12-12T22:31:09Z)
• Laser Manipulation of Spin-Exchange Interaction Between Alkaline-Earth Atoms in $^1$S$_0$ and $^3$P$_2$ States [14.119534067895096]
  We show that due to the structure of alkaline-earth (like) atoms, the heating effects induced by the laser beams of our methods are very weak. As a result, the Feshbach resonances, with which one can efficiently control the SEI by changing the laser intensity, may be induced by the laser beams with low-enough heating rate.
  arXiv  Detail & Related papers  (2021-11-04T14:49:19Z)
• Quantum Optimal Control of Nuclear Spin Qudecimals in $^{87}\text{Sr}$ [0.0]
  We study the ability to implement unitary maps on states of the $I=9/2$ nuclear spin in textsuperscript87Sr. We numerically study the quantum speed-limit, optimal parameters, and the fidelity of arbitrary state preparation and full SU maps.
  arXiv  Detail & Related papers  (2021-06-25T15:43:26Z)
• Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory [52.77024349608834]
  We show the first demonstration of entanglement between a telecom photon and a collective spin excitation in a multimode solid-state quantum memory. We extend the entanglement storage in the quantum memory for up to 47.7$mu$s, which could allow for the distribution of entanglement between quantum nodes separated by distances of up to 10 km.
  arXiv  Detail & Related papers  (2021-06-09T13:59:26Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Anharmonic oscillator: a solution [77.34726150561087]
  The dynamics in $x$-space and in $(gx)-space corresponds to the same energy spectrum with effective coupling constant $hbar g2$. A 2-classical generalization leads to a uniform approximation of the wavefunction in $x$-space with unprecedented accuracy.
  arXiv  Detail & Related papers  (2020-11-29T22:13:08Z)
• Implementation of a transmon qubit using superconducting granular aluminum [0.0]
  grAl may provide a robust source of non-linearity for strongly driven quantum circuits. In intrinsic qubit linewidth $gamma = 2 pi times 10,mathrmkHz$, corresponding to a lifetime of $16,mathrmmu s$. This linewidth remains below $2 pi times 150,mathrmkHz$ for in-plane magnetic fields up to $sim70,mathrmmT$.
  arXiv  Detail & Related papers  (2019-11-06T12:18:43Z)

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.