Observation of the Dipole Blockade Effect in Detecting Rydberg Atoms by the Selective Field Ionization Method
arXiv:2004.09933 · doi:10.1134/S1063776120010215
Abstract
The dipole blockade effect at laser excitation of mesoscopic ensembles of Rydberg atoms lies in the fact that the excitation of one atom to a Rydberg state blocks the excitation of other atoms due to the shift in the collective energy levels of interacting Rydberg atoms. It is used to obtain the entangled qubit states based on single neutral atoms in optical traps. In this paper, we present our experimental results on the observation of the dipole blockade for mesoscopic ensembles of 1-5 atoms when they are detected by the selective field ionization method. We investigated the spectra of the three-photon laser excitation of cold Rb Rydberg atoms in a magneto-optical trap. We have found that for mesoscopic ensembles this method allows only a partial dipole blockage to be observed. This is most likely related to the presence of parasitic electric fields reducing the interaction energy of Rydberg atoms, the decrease in the probability of detecting high states, and the strong angular dependence of the interaction energy of Rydberg atoms in a single interaction volume.
arXiv comment16 pages, 7 figures
References in corpus (24)
- Quantum information with Rydberg atoms
- Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles
- Fast quantum gates for neutral atoms
- Demonstration of a neutral atom controlled-NOT quantum gate
- Entanglement of two individual neutral atoms using Rydberg blockade
- Quantum computing with atomic qubits and Rydberg interactions: Progress and challenges
- Local Blockade of Rydberg Excitation in an Ultracold Gas
- Suppression of Excitation and Spectral Broadening Induced by Interactions in a Cold Gas of Rydberg Atoms
- Entangling Atomic Spins with a Strong Rydberg-Dressed Interaction
- Evidence for coherent collective Rydberg excitation in the strong blockade regime
- Dipole blockade in a cold Rydberg atomic sample
- Observation of coherent many-body Rabi oscillations
- Entangling two atoms of different isotopes via Rydberg blockade
- Electric-field induced dipole blockade with Rydberg atoms
- Demonstration of a strong Rydberg blockade in three-atom systems with anisotropic interactions
- Observation of the Stark-tuned Forster resonance between two Rydberg atoms
- Coherence and Rydberg blockade of atomic ensemble qubits
- Two-Atom Rydberg Blockade using Direct 6S to nP Excitation
- Spectroscopy of cold rubidium Rydberg atoms for applications in quantum information
- Cooperative excitation and many-body interactions in a cold Rydberg gas
- Controlling the interactions of a few cold Rb Rydberg atoms by radiofrequency-assisted Förster resonances
- Observation of the Borromean three-body Förster resonances for three interacting Rb Rydberg atoms
- Effect of finite detection efficiency on the observation of the dipole-dipole interaction of a few Rydberg atoms
- Investigation of cold Rb Rydberg atoms in a magneto-optical trap