The University of Southampton
University of Southampton Institutional Repository

Decoherence suppression in a resonant driving field

Decoherence suppression in a resonant driving field
Decoherence suppression in a resonant driving field
Resonant radio frequency (rf) control fields have been employed to suppress decoherence in single quantum bits (qubits) encoded in the probability amplitudes of np fine-structure states in Li Rydberg atoms. As described previously [1], static electric-field tuning of the spin and orbital angular momentum composition of the fine-structure eigenstates enables qubit storage in an approximate decoherence-free subspace in which phase errors due to small stray electric and magnetic fields are strongly suppressed. In addition, it was found that sequences of short electric field pulses could be utilized in a 'bang-bang' dynamic decoupling scheme to improve coherence times. We now show that a continuous resonant rf field can also suppress decoherence in this system. The rf-dressed fine-structure states form a more robust basis in which the energy splitting between the component qubit levels is locked to the drive frequency, and decoherence is essentially eliminated. Measurements of the operational range of rf frequency and field strength required to achieve decoherence suppression are in agreement with the predictions of a two-level model
atomic and molecular physics, computational physics, quantum information and quantum mechanics
0953-4075
Minns, R.S.
85280db4-c5a6-4a4c-82fe-75693c6a6045
Kutteruf, M.R.
6858b324-a96e-4368-8cb4-7eed4be54dca
Commisso, M.A.
69b16e17-ffa5-421a-8c96-439241d48cb3
Jones, R.R.
6d1e29b3-75b9-4496-856f-eb7416283d5a
Minns, R.S.
85280db4-c5a6-4a4c-82fe-75693c6a6045
Kutteruf, M.R.
6858b324-a96e-4368-8cb4-7eed4be54dca
Commisso, M.A.
69b16e17-ffa5-421a-8c96-439241d48cb3
Jones, R.R.
6d1e29b3-75b9-4496-856f-eb7416283d5a

Minns, R.S., Kutteruf, M.R., Commisso, M.A. and Jones, R.R. (2008) Decoherence suppression in a resonant driving field. [in special issue: Coherent Control] Journal of Physics B: Atomic and Molecular Physics, 41 (7). (doi:10.1088/0953-4075/41/7/074012).

Record type: Article

Abstract

Resonant radio frequency (rf) control fields have been employed to suppress decoherence in single quantum bits (qubits) encoded in the probability amplitudes of np fine-structure states in Li Rydberg atoms. As described previously [1], static electric-field tuning of the spin and orbital angular momentum composition of the fine-structure eigenstates enables qubit storage in an approximate decoherence-free subspace in which phase errors due to small stray electric and magnetic fields are strongly suppressed. In addition, it was found that sequences of short electric field pulses could be utilized in a 'bang-bang' dynamic decoupling scheme to improve coherence times. We now show that a continuous resonant rf field can also suppress decoherence in this system. The rf-dressed fine-structure states form a more robust basis in which the energy splitting between the component qubit levels is locked to the drive frequency, and decoherence is essentially eliminated. Measurements of the operational range of rf frequency and field strength required to achieve decoherence suppression are in agreement with the predictions of a two-level model

Full text not available from this repository.

More information

Published date: 25 March 2008
Additional Information: 074012, Times Cited: 1
Keywords: atomic and molecular physics, computational physics, quantum information and quantum mechanics
Organisations: Chemistry

Identifiers

Local EPrints ID: 336634
URI: http://eprints.soton.ac.uk/id/eprint/336634
ISSN: 0953-4075
PURE UUID: 1832c6e3-e139-45d7-9223-05b1a3e496ab
ORCID for R.S. Minns: ORCID iD orcid.org/0000-0001-6775-2977

Catalogue record

Date deposited: 02 Apr 2012 11:02
Last modified: 20 Jul 2019 00:43

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×