Fully Collective Superradiant Lasing with Vanishing Sensitivity to Cavity Length Vibrations

2025/06/13 by Reilly, Jarrod T., Jäger, Simon B., Cooper, John +1 · 2 citations
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2506.12267

Abstract

To date, realization of a continuous-wave active atomic clock has been elusive primarily due to parasitic heating from spontaneous emission while repumping the atoms. Here, we propose a solution to this problem by replacing the random emission with coupling to an auxiliary cavity, making repumping a fully collective process. While it is known that collective two-level models do not possess a generic lasing threshold, we show this restriction is overcome with multi-level atoms since collective pumping and decay can be performed on distinct transitions. Using relevant atomic parameters, we find this system is capable of producing an O(100 μHz)-linewidth continuous-wave superradiant laser. Our principal result is the potential for an operating regime with cavity length vibration sensitivity below O(10^-14 / g), including a locus of parameter values where it completely vanishes even at steady-state.

Citations

• Clock precision beyond the Standard Quantum Limit at 10^-18 level
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
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• The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background
• Sub-Natural Linewidth Superradiant Lasing with Cold ⁸⁸Sr Atoms
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Cited by

• Continuous Accumulation of Cold Atoms in an Optical Cavity
• Emergent spin order and steady-state superradiance in one-dimensional baths

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