Lasers with Sub-10 mHz Linewidth
DG Matei, T Legero, S Häfner, C Grebing, R Weyrich… - Physical review …, 2017 - APS
We report on two ultrastable lasers each stabilized to independent silicon Fabry-Pérot
cavities operated at 124 K. The fractional frequency instability of each laser is completely …
cavities operated at 124 K. The fractional frequency instability of each laser is completely …
A Fermi-degenerate three-dimensional optical lattice clock
Strontium optical lattice clocks have the potential to simultaneously interrogate millions of
atoms with a high spectroscopic quality factor of 4× 1017. Previously, atomic interactions …
atoms with a high spectroscopic quality factor of 4× 1017. Previously, atomic interactions …
Superradiance: the principles of generation and implementation in lasers
VIV Kocharovsky, VV Zheleznyakov… - Physics …, 2017 - iopscience.iop.org
The electrodynamics of active continuous media is applied to theoretically examine
collective spontaneous emission regimes of dipole oscillator ensembles. Recent …
collective spontaneous emission regimes of dipole oscillator ensembles. Recent …
The development of active optical clock
J Zhang, T Shi, J Miao, J Chen - AAPPS Bulletin, 2023 - Springer
The atomic clocks, whether operating at optical or microwave region, can be divided into two
categories according to their working mode, namely the passive clocks and active clocks …
categories according to their working mode, namely the passive clocks and active clocks …
Superradiance on the millihertz linewidth strontium clock transition
Laser frequency noise contributes a significant limitation to today's best atomic clocks. A
proposed solution to this problem is to create a superradiant laser using an optical clock …
proposed solution to this problem is to create a superradiant laser using an optical clock …
A non-equilibrium superradiant phase transition in free space
A class of systems exists in which dissipation, external drive and interactions compete and
give rise to non-equilibrium phases that would not exist without the drive. There, phase …
give rise to non-equilibrium phases that would not exist without the drive. There, phase …
Frequency measurements of superradiance from the strontium clock transition
We present the first characterization of the spectral properties of superradiant light emitted
from the ultranarrow, 1-mHz-linewidth optical clock transition in an ensemble of cold Sr 87 …
from the ultranarrow, 1-mHz-linewidth optical clock transition in an ensemble of cold Sr 87 …
Laser-driven superradiant ensembles of two-level atoms near Dicke regime
We report the experimental observation of a superradiant emission emanating from an
elongated dense ensemble of laser cooled two-level atoms, with a radial extent smaller than …
elongated dense ensemble of laser cooled two-level atoms, with a radial extent smaller than …
Emergent dark states from superradiant dynamics in multilevel atoms in a cavity
We investigate the collective decay dynamics of atoms with a generic multilevel structure
(angular momenta F↔ F′) coupled to two light modes of different polarization inside a …
(angular momenta F↔ F′) coupled to two light modes of different polarization inside a …
Nonreciprocal superradiant phase transitions and multicriticality in a cavity QED system
We demonstrate the emergence of nonreciprocal superradiant phase transitions and novel
multicriticality in a cavity quantum electrodynamics system, where a two-level atom interacts …
multicriticality in a cavity quantum electrodynamics system, where a two-level atom interacts …