267 citations · 2.2k across the 28 of their papers we have counts for
14 papers · 1 filter
Predicting the Slow Drift of Nuclear Spin Noise in Semiconductor Spin Qubits
Wayne M. Witzel, Jesse J. Lutz, Matthew D. Grace +3
The dynamics of a nuclear spin bath generates magnetic noise that is a key contributor to the decoherence of electron spin qubits in electrostatically-defined quantum dots. In this…
Probing low noise at the MOS interface with a spin-orbit qubit
Ryan M. Jock, N. Tobias Jacobson, Patrick Harvey-Collard +12
The silicon metal-oxide-semiconductor (MOS) material system is technologically important for the implementation of electron spin-based quantum information technologies. Researchers…
Converting a real quantum bath to an effective classical noise
Wayne M. Witzel, Kevin Young, Sankar Das Sarma
We present a cluster expansion method for approximating quantum spin-bath dynamics in terms of a classical Gaussian stochastic process. The cluster expansion produces the two-point…
Quantum Decoherence of the Central Spin in a Sparse System of Dipolar Coupled Spins
Wayne M. Witzel, Malcolm S. Carroll, Lukasz Cywinski +1
The central spin decoherence problem has been researched for over 50 years in the context of both nuclear magnetic resonance and electron spin resonance. Until recently, theoretica…
SiGe/Si quantum dot electron spin decoherence dependence on Ge
Wayne M. Witzel, Rajib Rahman, Malcolm S. Carroll
We theoretically study the nuclear spin induced decoherence of a quantum dot in Si that is confined at a SiGe interface. We calculate decoherence time dependence on Ge in th…
Electron spin decoherence in isotope-enriched silicon
Wayne M. Witzel, Malcolm S. Carroll, Andrea Morello +2
Silicon is promising for spin-based quantum computation because nuclear spins, a source of magnetic noise, may be eliminated through isotopic enrichment. Long spin decoherence time…