Long-lived memory for electronic spin in a quantum dot: Numerical analysis

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.

RevTex, 10 pages, 9 EPS figures

References in corpus (10)

• Quantum Computation with Quantum Dots
• Single-shot read-out of an individual electron spin in a quantum dot
• NMR Techniques for Quantum Control and Computation
• Theory of the spin bath
• Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
• Optical pumping of electronic and nuclear spin in single charge-tunable quantum dots
• Long-lived memory for mesoscopic quantum bits
• Optical pumping of quantum dot nuclear spins
• An efficient scheme for numerical simulations of the spin-bath decoherence
• Controlling a mesoscopic spin environment by quantum bit manipulation

Cited by in corpus (14)

• Semiconductor Spintronics
• Solid state quantum memory using the 31P nuclear spin
• Hyperfine interaction induced decoherence of electron spins in quantum dots
• Qubit protection in nuclear-spin quantum dot memories
• High-fidelity quantum memory utilizing inhomogeneous nuclear polarization in a quantum dot
• Uniaxial dynamical decoupling for an open quantum system
• Controlled exchange interaction for quantum logic operations with spin qubits in coupled quantum dots
• Quantum memory assisted precision rotation sensing
• Inhomogeneous dynamic nuclear polarization and suppression of electron-polarization decay in a quantum dot
• Universal dynamics of quantum spin decoherence in a spin bath
• Noise-resistant quantum memory enabled by Hamiltonian engineering
• Entangling nuclear spins in distant quantum dots via an electron bus
• Floquet Dynamical Decoupling at Zero Bias
• Extending Qubit Coherence Time via Hybrid Dynamical Decoupling