194 citations · 1.1k across the 10 of their papers we have counts for
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Wavefunction considerations for the central spin decoherence problem in a nuclear spin bath
W. M. Witzel, S. Das Sarma
Decoherence of a localized electron spin in a solid state material (the ``central spin'' problem) at low temperature is believed to be dominated by interactions with nuclear spins…
Universal pulse sequence to minimize spin dephasing in the central spin decoherence problem
B. Lee, W. M. Witzel, S. Das Sarma
We present a remarkable finding that a recently discovered [G. S. Uhrig, Phys. Rev. Lett. 98, 100504 (2007)] series of pulse sequences, designed to optimally restore coherence to a…
Concatenated dynamical decoupling in a solid-state spin bath
W. M. Witzel, S. Das Sarma
Concatenated dynamical decoupling (CDD) pulse sequences hold much promise as a strategy to mitigate decoherence in quantum information processing. It is important to investigate th…
Nuclear Spins as Quantum Memory in Semiconductor Nanostructures
W. M. Witzel, S. Das Sarma
We theoretically consider solid state nuclear spins in a semiconductor nanostructure environment as long-lived, high-fidelity quantum memory. In particular, we calculate, in the li…
Decoherence induced by anisotropic hyperfine interaction in Si spin qubits
W. M. Witzel, Xuedong Hu, S. Das Sarma
We study Si:P donor electron spin decoherence due to anisotropic hyperfine (AHF) interaction with the surrounding nuclear spin bath. In particular, we clarify the electron spin ech…