Quantum Information Processing with Nanomechanical Qubits

Abstract

We introduce an approach to quantum information processing where the information is stored in the motional degrees of freedom of nanomechanical devices. The qubits of our approach are formed by the two lowest energy levels of mechanical resonators which are tuned to be strongly anharmonic by suitable electrostatic fields. Single qubit rotations are conducted by radio frequency voltage pulses that are applied to individual resonators. Two qubit entangling gates in turn are implemented via a coupling of two qubits to a common optical resonance of a high finesse cavity. We find that gate fidelities exceeding 99% can be achieved for realistic experimental parameters.

estimates for electric noise added, typos corrected, to appear in Phys Rev Lett

References in corpus (6)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Opto-mechanical transducers for long-distance quantum communication
• Strong coupling between single-electron tunneling and nano-mechanical motion
• Carbon nanotubes as ultra-high quality factor mechanical resonators
• Steady state entanglement in the mechanical vibrations of two dielectric membranes
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• Self-Sustained Oscillation and Dynamical Multistability of Optomechanical Systems in the Extremely-Large-Amplitude Regime
• Phonon antibunching effect in coupled nonlinear micro/nanomechanical resonator at finite temperature
• Robustness of continuous-variable entanglement via geometrical nonlinearity
• Interactive optomechanical coupling with nonlinear polaritonic systems
• Ground state cooling in a hybrid optomechanical system with a three-level atomic ensemble
• Creating arbitrary quantum vibrational states in a carbon nanotube