One-spin quantum logic gates from exchange interactions and a global magnetic field

Abstract

It has been widely assumed that one-qubit gates in spin-based quantum computers suffer from severe technical difficulties. We show that one-qubit gates can in fact be generated using only modest and presently feasible technological requirements. Our solution uses only global magnetic fields and controllable Heisenberg exchange interactions, thus circumventing the need for single-spin addressing.

4 pages, incl. 1 figure. This significantly modified version accepted for publication in Phys. Rev. Lett

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Cited by in corpus (18)

• Recipes for spin-based quantum computing
• Non-Markovian reduced dynamics and entanglement evolution of two coupled spins in a quantum spin environment
• Efficient quantum circuits for one-way quantum computing
• Ultrasensitive mechanical detection of magnetic moment using a commercial disk drive write head
• Exchange-controlled single-electron-spin rotations in quantum dots
• Decoherence due to contacts in ballistic nanostructures
• Fault-Tolerant Quantum Computation via Exchange interactions
• Correlated errors can lead to better performance of quantum codes
• Dressed Qubits in Nuclear Spin Baths
• Local Operations in qubit arrays via global but periodic Manipulation
• Spin freezing by Anderson localization in one-dimensional semiconductors
• Repeated measurements and nuclear spin polarization
• Quantum-dot spin qubit and hyperfine interaction
• Globally controlled universal quantum computation with arbitrary subsystem dimension
• Entanglement dynamics of two qubits under the influence of external kicks and Gaussian pulses
• Control and manipulation of entanglement between two coupled qubits by fast pulses
• The Spin Density Matrix I: General Theory and Exact Master Equations
• Mimicking states with limited resources: passing quantum quiz via global control