Coherent control of addressable Rydberg atoms for hybrid quantum information processing

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Abstract

Neutral atoms provide an excellent resource for quantum information processing, combining the long atomic coherence times of the hyperfine ground-state with strong dipole-dipole interactions of highly excited Rydberg states for generating deterministic entanglement between qubits separated by < 10 µm [1]. Scalable long-range interactions can be obtained by coupling the atomic array to a superconducting microwave cavity enabling hybrid quantum information processing where the cavity-mediated entanglement allows atoms to be coupled over cm length scales. We present the first steps towards such an experiment incorporating high fidelity readout using an sCMOS camera [2] and the ability to drive fast, optically addressable rotations of the hyperfine-encoded qubits to the Rydberg state. Using our sub-kHz cavitystabilised laser system [3] we demonstrate coherent control of single Rydberg atoms, performing Ramsey spectroscopy to determine coherence time and to generate entanglement between a pair of atoms separated by 6 µm. Combining this excitation scheme with our ground-state Raman lasers we show progress towards the implementation of a mesoscopic Rydberg gate based on electromagnetically induced transparency (EIT) offering robust entanglement of multi-atom ensembles [4].
Original languageEnglish
Number of pages1
Publication statusPublished - 25 Jul 2018
Event26th International Conference on Atomic Physics - Barcelona, Spain
Duration: 22 Jul 201827 Jul 2018

Conference

Conference26th International Conference on Atomic Physics
Abbreviated titleICAP2018
CountrySpain
CityBarcelona
Period22/07/1827/07/18

Keywords

  • quantum information processing
  • highly excited Rydberg states
  • Rydberg atoms
  • Ramsey spectroscopy

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