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Bismuth Qubits in Silicon: The Role of EPR Cancellation Resonances

Mohammady, MH; Morley, GW; Monteiro, TS; (2010) Bismuth Qubits in Silicon: The Role of EPR Cancellation Resonances. PHYS REV LETT , 105 (6) , Article 067602. 10.1103/PhysRevLett.105.067602. Green open access

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Abstract

We investigate electron paramagnetic resonance spectra of bismuth-doped silicon, at intermediate magnetic fields B similar or equal to 0:1-0:6 T, theoretically and experimentally (with 9.7 GHz X-band spectra). We identify a previously unexplored regime of "cancellation resonances," where a component of the hyperfine coupling is resonant with the external field. We show that this regime has experimentally accessible consequences for quantum information applications, such as reduction of decoherence, fast manipulation of the coupled electron-nuclear qubits, and spectral line narrowing.

Type: Article
Title: Bismuth Qubits in Silicon: The Role of EPR Cancellation Resonances
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.105.067602
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.105.067602
Language: English
Additional information: © 2010 The American Physical Society
Keywords: NUCLEAR-SPIN
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/569359
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