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Anisotropy with respect to the applied magnetic field of spin qubit decoherence times.
- Source :
- NPJ Quantum Information; 6/21/2022, Vol. 8 Issue 1, p1-9, 9p
- Publication Year :
- 2022
-
Abstract
- Electron spin qubits are a promising platform for quantum computation. Environmental noise impedes coherent operations by limiting the qubit relaxation (T<subscript>1</subscript>) and dephasing (T<subscript>ϕ</subscript>) times. There are multiple sources of such noise, which makes it important to devise experimental techniques that can detect the spatial locations of these sources and determine the type of source. In this paper, we propose that anisotropy in T<subscript>1</subscript> and T<subscript>ϕ</subscript> with respect to the direction of the applied magnetic field can reveal much about these aspects of the noise. We investigate the anisotropy patterns of charge noise, evanescent-wave Johnson noise, and hyperfine noise in hypothetical devices. It is necessary to have a rather well-characterized sample to get the maximum benefit from this technique. The general anisotropy patterns are elucidated. We calculate the expected anisotropy for a particular model of a Si/SiGe quantum dot device. [ABSTRACT FROM AUTHOR]
- Subjects :
- MAGNETIC fields
ANISOTROPY
ELECTRON spin
QUANTUM dot devices
THERMAL noise
Subjects
Details
- Language :
- English
- ISSN :
- 20566387
- Volume :
- 8
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- NPJ Quantum Information
- Publication Type :
- Academic Journal
- Accession number :
- 157571185
- Full Text :
- https://doi.org/10.1038/s41534-022-00576-6