Actions

Download Analytics Citations

Export to: EndNote  |  Zotero  |  Mendeley

Collections

This file is not currently in any collections.

Robust Storage Qubits in Ultracold Polar Molecules [dataset] Open Access

Quantum states with long-lived coherence are essential for quantum computation, simulation and metrology. The nuclear spin states of ultracold molecules prepared in the singlet rovibrational ground state are an excellent candidate for encoding and storing quantum information. However, it is important to understand all sources of decoherence for these qubits, and then eliminate them, in order to reach the longest possible coherence times. Here, we fully characterise the dominant mechanisms for decoherence of a storage qubit in an optically trapped ultracold gas of RbCs molecules using high-resolution Ramsey spectroscopy. Guided by a detailed understanding of the hyperfine structure of the molecule, we tune the magnetic field to where a pair of hyperfine states have the same magnetic moment. These states form a qubit, which is insensitive to variations in magnetic field. Our experiments reveal a subtle differential tensor light shift between the states, caused by weak mixing of rotational states. We demonstrate how this light shift can be eliminated by setting the angle between the linearly polarised trap light and the applied magnetic field to a magic angle of 55 degrees. This leads to a coherence time exceeding 5.6s at the 95% confidence level.

Descriptions

Resource type

Dataset

Contributors

Creator: Gregory, Philip David ¹
Contact person: Gregory, Philip David ¹
Data collector: Gregory, Philip David ¹
Contact person: Cornish, Simon ¹

¹ Durham University, UK

Funder

Engineering and Physical Sciences Research Council

Research methods

Production and optical trapping of ultracold RbCs molecules
Ramsey spectroscopy

Other description

Keyword

Qubits
RbCs
Ultracold polar molecules

Subject

Location

Language

Cited in

doi:10.1038/s41567-021-01328-7

Identifier

ark:/32150/r25m60qr93w
doi:10.15128/r25m60qr93w

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

P.D. Gregory

Date Uploaded

2 July 2021, 09:07:13

Date Modified

15 September 2021, 09:09:44

Audit Status

Audits have not yet been run on this file.

Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 228063

Last modified: 2021:07:02 10:17:22+01:00

Filename: DOI.zip

Original checksum: 662fc26235e2e0dccec811abcbf421e5