Department of Physics, Stanford University, Stanford, California 94305, USA.
Published: August 2023
AI Article Synopsis
Article Abstract
We report on the creation of an array of spin-squeezed ensembles of cesium atoms via Rydberg dressing, a technique that offers optical control over local interactions between neutral atoms. We optimize the coherence of the interactions by a stroboscopic dressing sequence that suppresses super-Poissonian loss. We thereby prepare squeezed states of N=200 atoms with a metrological squeezing parameter ξ^{2}=0.77(9) quantifying the reduction in phase variance below the standard quantum limit. We realize metrological gain across three spatially separated ensembles in parallel, with the strength of squeezing controlled by the local intensity of the dressing light. Our method can be applied to enhance the precision of tests of fundamental physics based on arrays of atomic clocks and to enable quantum-enhanced imaging of electromagnetic fields.
- The study focuses on how laser linewidth affects the dynamics and pattern formation in Rydberg noise-dressed Bose-Einstein condensates (RnD BECs).
- It reveals that a uniform matter wave can change into different self-organized patterns based on variations in laser linewidth, control field intensity, and atomic density.
- The research identifies stable nonlocal matter-wave solitons, vortices, and soliton molecules emerging at particular laser linewidth settings.
Confinement is a pivotal phenomenon in numerous models of high-energy and statistical physics. In this study, we investigate the emergence of confined meson excitations within a one-dimensional system, comprising Rydberg-dressed atoms trapped and coupled to a cavity field. This system can be effectively represented by an Ising-Dicke Hamiltonian model.
The text discusses a new method to analyze how electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS) affect laser spectroscopy in a four-level microwave-dressed Rydberg system.
It highlights that when a microwave field is introduced and its intensity adjusted, the behavior of transparency windows changes, with EIT being dominant when the microwave field is off and transitioning to ATS as it is increased.
This four-level approach offers deeper insights into quantum interference in atomic systems, with implications for improved sensitivity and applications in quantum processing and communication.
In recent years, Rydberg excitations in atomic quantum gases have become a successful platform to explore quantum impurity problems. A single impurity immersed in a Fermi gas leads to the formation of a polaron, a quasiparticle consisting of the impurity being dressed by the surrounding medium. With a radius of about the Fermi wavelength, the density profile of a polaron cannot be explored using in situ optical imaging techniques.
We theoretically and experimentally investigate the Rydberg electromagnetically induced transparency (EIT) and Autler-Townes (AT) splitting of Rb vapor under the combined influence of a magnetic field and a microwave field. In the presence of static magnetic field, the effect of the microwave field leads to the dressing and splitting of each m state, resulting in multiple spectral peaks in the EIT-AT spectrum. A simplified analytical formula was developed to explain the EIT-AT spectrum in a static magnetic field, and the theoretical calculations agree qualitatively with experimental results.
