Decoherence of Nuclear Spin Quantum Memory in Quantum Dot
arXiv:cond-mat/0406478 · doi:10.1109/TNANO.2004.840149
Abstract
Recently an ensemble of nuclear spins in a quantum dot have been proposed as a long-lived quantum memory. A quantum state of an electron spin in the dot can be faithfully transfered into nuclear spins through controlled hyperfine coupling. Here we study the decoherence of this memory due to nuclear spin dipolar coupling and inhomogeneous hyperfine interaction during the {\it storage} period. We calculated the maximum fidelity of writing, storing and reading operations. Our results show that nuclear spin dynamics can severely limits the performance of the proposed device for quantum information processing and storage based on nuclear spins.
Based on work presented at the 2004 IEEE NTC Quantum Device Technology
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Cited by in corpus (5)
- Collective quantum memory activated by a driven central spin
- Qubit protection in nuclear-spin quantum dot memories
- Nuclear Spins as Quantum Memory in Semiconductor Nanostructures
- Optimisation of electrically-driven multi-donor quantum dot qubits
- Loschmidt echo driven by hyperfine and electric-quadrupole interactions in nanoscale nuclear spin baths