Long-lived memory for electronic spin in a quantum dot: Numerical analysis
- 15 June 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 73 (24) , 245318
- https://doi.org/10.1103/physrevb.73.245318
Abstract
Techniques for coherent control of electron spin-nuclear spin interactions in quantum dots can be directly applied in spintronics and in quantum information processing. In this work we study numerically the interaction of electron and nuclear spins in the context of storing the spin state of an electron in a collective state of nuclear spins. We take into account the errors inherent in a realistic system: the incomplete polarization of the bath of nuclear spins and the different hyperfine interactions between the electron and individual nuclei in the quantum dot. Although these imperfections deteriorate the fidelity of the quantum information retrieval, we find reasonable fidelities are achievable for modest bath polarizations.Keywords
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This publication has 18 references indexed in Scilit:
- Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum DotsScience, 2005
- Triplet–singlet spin relaxation via nuclei in a double quantum dotNature, 2005
- Optical Pumping of the Electronic and Nuclear Spin of Single Charge-Tunable Quantum DotsPhysical Review Letters, 2005
- Single-shot read-out of an individual electron spin in a quantum dotNature, 2004
- Quantum Oscillations without Quantum CoherencePhysical Review Letters, 2003
- Long-Lived Memory for Mesoscopic Quantum BitsPhysical Review Letters, 2003
- Theory of the spin bathReports on Progress in Physics, 2000
- Quantum Information Processing Using Quantum Dot Spins and Cavity QEDPhysical Review Letters, 1999
- Quantum computation with quantum dotsPhysical Review A, 1998
- Electronic analog of the electro-optic modulatorApplied Physics Letters, 1990