Quantum Dots for Quantum Information Processing: Controlling and Exploiting the Quantum Dot Environment
This thesis offers a comprehensive introduction to surface acoustic waves in the quantum regime. It addresses two of the most significant technological challenges in developing a scalable quantum information processor based on spins in quantum dots: (i) decoherence of the electronic spin qubit due to the surrounding nuclear spin bath, and (ii) long-range spin-spin coupling between remote qubits. Electron spins confined in quantum dots (QDs) are among the leading contenders for implementing quantum information processing. To this end, the author pursues novel strategies that turn the unavoidable coupling to the solid-state environment (in particular, nuclear spins and phonons) into a valuable asset rather than a liability.
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Quantum Dots for Quantum Information Processing: Controlling and Exploiting ...
Martin J. A. Schütz
No preview available - 2016
Appendix approximation cavity mode cavity QED charge qubit coherent correlation cotunneling coupling strength decoherence degrees of freedom density matrix dephasing described detuning dissipative double quantum dot electric electron spin electron transport electronic and nuclear electronic degrees energy entanglement estimate experimental fluctuations frequency GaAs gradient Hamiltonian HF coupling HF interaction hyperfine coupling hyperfine interaction inhomogeneous J.I. Cirac leads leakage current Lett M.D. Lukin magnetic field master equation mechanical noise nuclear dynamics nuclear polarization nuclear spin dynamics nuclear spin ensembles nuclear spins nuclear system nuclei numerical operators Overhauser field parameters Pauli-blockade phase transition phonon Phys piezoelectric potential quantum computing quantum information processing quantum optics quantum systems resonance SAW phonon semiclassical singlet solid-state spin qubit spin-orbit steady-state subspace subsystem superoperator superradiant surface acoustic waves theoretical timescales triplet typical Zeeman splitting εσ