期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.237601
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资金
- NSERC
- CIFAR
- FQRNT
- INTRIQ
We develop a theory for the spin-echo dynamics of a heavy hole in a quantum dot, accounting for both hyperfine- and electric-field-induced fluctuations. We show that a moderate applied magnetic field can drive this system to a motional-averaging regime, making the hyperfine interaction ineffective as a decoherence source. Furthermore, we show that decay of the spin-echo envelope is highly sensitive to the geometry. In particular, we find a specific choice of initialization and pi-pulse axes which can be used to study intrinsic hyperfine-induced hole-spin dynamics, even in systems with substantial electric-fieldinduced dephasing. These results point the way to designed hole-spin qubits as a robust and long-lived alternative to electron spins. DOI: 10.1103/PhysRevLett.109.237601
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