In situ subwavelength microscopy of ultracold atoms using dressed excited states
arXiv:2310.09396 · doi:10.1103/PRXQuantum.5.030349
Abstract
In this work, we implement a new method for imaging ultracold atoms with subwavelength resolution capabilities and determine its regime of validity. It uses the laser driven interaction between excited states to engineer hyperfine ground state population transfer in a three-level system on scales much smaller than the optical resolution. Subwavelength imaging of a quantum gas is atypical in the sense that the measurement itself perturbs the dynamics of the system. To avoid induced dynamics affecting the measurement, one usually measures "rapidly" the wavefunction in a so-called strong imaging regime. We experimentally illustrate this regime using a thermal gas ensemble, and demonstrate subwavelength resolution in quantitative agreement with a fully analytical model. Additionally, we show that, counter-intuitively, the opposite weak imaging regime can also be exploited to reach subwavelength resolution. As a proof of concept, we demonstrate that this regime is a robust solution to select and spatially resolve a 30 nm wide wavefunction, which was created and singled out from a tightly confined 1D optical lattice. Using a general dissipation-included formalism, we derive validity criteria for both regimes. The formalism is applicable to other subwavelength methods.
arXiv comment17 pages, 11 figures
References in corpus (21)
- Experimental realization of a long-range antiferromagnet in the Hubbard model with ultracold atoms
- Single-Spin Addressing in an Atomic Mott Insulator
- Tools for quantum simulation with ultracold atoms in optical lattices
- Spontaneous rotating vortex lattices in a pumped decaying condensate
- A Bose-Einstein condensate in an optical lattice
- Rapid production of Rb BECs in a combined magnetic and optical potential
- Free-space lossless state-detection of a single trapped atom
- Magic wavelengths for the np-ns transitions in alkali-metal atoms
- Robust Bilayer Charge-Pumping for Spin- and Density-Resolved Quantum Gas Microscopy
- Dynamic optical lattices of sub-wavelength spacing for ultracold atoms
- Super-resolution microscopy of single atoms in optical lattices
- Analysis of Kapitza-Dirac diffraction patterns beyond the Raman-Nath regime
- Super-resolution microscopy of cold atoms in an optical lattice
- A Wavefunction Microscope for Ultracold Atoms
- Quantum gas magnifier for sub-lattice-resolved imaging of three-dimensional quantum systems
- Realization of a fractional period adiabatic superlattice
- Stochastic Gross-Pitaevskii Equation for the Dynamical Thermalization of Bose-Einstein Condensates
- Realization of a stroboscopic optical lattice for cold atoms with subwavelength spacing
- In situ characterization of an optical cavity using atomic light shift
- Doubly-dressed states for near-field trapping and subwavelength lattice structuration
- Effective two-level approximation of a multi-level system driven by coherent and incoherent fields