Cavity Sub- and Superradiance Enhanced Ramsey Spectroscopy

Abstract

Ramsey spectroscopy in large, dense ensembles of ultra-cold atoms trapped in optical lattices suffers from dipole-dipole interaction induced shifts and collective superradiance limiting its precision and accuracy. We propose a novel geometry implementing fast signal readout with minimal heating for large atom numbers at lower densities via an optical cavity operated in the weak single atom but strong collective coupling regime. The key idea is controlled collective transverse $\pi /2$-excitation of the atoms to prepare a macroscopic collective spin protected from cavity superradiance. This requires that the two halves of the atomic ensemble are coupled to the cavity mode with opposite phase, which is naturally realized for a homogeneously filled volume covering odd and even sites of the cavity mode along the cavity axis. The origin of the superior precision can be traced back to destructive interference among sub-ensembles in the complex nonlinear collective atom field dynamics. In the same configuration we find surprising regular self-pulsing of the cavity output for suitable continuous illumination. Our simulations for large atom numbers employing a cumulant expansion are qualitatively confirmed by a full quantum treatment of smaller ensembles.

arXiv comment8 pages, 7 figures

References in corpus (35)

• Cold atoms in cavity-generated dynamical optical potentials
• High-power collective charging of a solid-state quantum battery
• Entangled states and collective nonclassical effects in two-atom systems
• Prospects for a mHz-linewidth laser
• Subradiance in a Large Cloud of Cold Atoms
• Observation of Dicke Superradiance for Two Artificial Atoms in a Cavity with High Decay Rate
• Open quantum systems with local and collective incoherent processes: Efficient numerical simulation using permutational invariance
• Cold atom Clocks and Applications
• QuantumOptics.jl: A Julia framework for simulating open quantum systems
• Coherent control of a symmetry-engineered multi-qubit dark state in waveguide quantum electrodynamics
• Enhanced Quantum Interface with Collective Ion-Cavity Coupling
• Many-body Signatures of Collective Decay in Atomic Chains
• Cavity-Modified Collective Rayleigh Scattering of Two Atoms
• Non-destructive measurement of the transition probability in a Sr optical lattice clock
• Frequency measurements of superradiance from the strontium clock transition
• Storage and release of subradiant excitations in a dense atomic cloud
• QuantumCumulants.jl: A Julia framework for generalized mean-field equations in open quantum systems
• Pulse delay time statistics in a superradiant laser with calcium atoms
• Emergent dark states from superradiant dynamics in multilevel atoms in a cavity
• Protected state enhanced quantum metrology with interacting two-level ensembles
• Lasing on a narrow transition in a cold thermal strontium ensemble
• Extremely subradiant states in a periodic one-dimensional atomic array
• Superradiant to subradiant phase transition in the open system Dicke model: Dark state cascades
• A noise-immune cavity-assisted non-destructive detection for an optical lattice clock in the quantum regime
• Rugged mHz-Linewidth Superradiant Laser Driven by a Hot Atomic Beam
• A photonic quantum engine driven by superradiance
• Preparation of Subradiant States using Local Qubit Control in Circuit QED
• Monte-Carlo Simulations of Superradiant Lasing
• Superradiance from Lattice-Confined Atoms inside Hollow Core Fibre
• Subradiant-to-Subradiant Phase Transition in the Bad Cavity Laser
• Efficient frequency-selective single-photon antennas based on a bio-inspired nano-scale atomic ring design with 9-fold symmetry
• Super- and subradiance of clock atoms in multimode optical waveguides
• Cavity-enhanced non-destructive detection of atoms for an optical lattice clock
• Protected subspace Ramsey spectroscopy
• Cavity-immune features in the spectra of superradiant crossover laser pulses

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• Subradiance and Superradiant Long Range Excitation Transport among Quantum Emitter Ensembles in a Waveguide
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• Restricted Monte Carlo wave function method and Lindblad equation for identifying entangling open-quantum-system dynamics
• Many-Body Entanglement in Solid-State Emitters
• Stability of macroscopic spin ensembles against inhomogeneous dephasing
• Conditional Entanglement Amplification via Non-Hermitian Superradiant Dynamics
• Quantum correlated steady states under competing collective and individual decay
• Demonstration of strong coupling of a subradiant atom array to a cavity vacuum
• Selective Preparation of Collective States in Coupled Quantum Emitters Using the SUPER Excitation Scheme