Electrically driven spin resonance in a bent disordered carbon nanotube

Abstract

Resonant manipulation of carbon nanotube valley-spin qubits by an electric field is investigated theoretically. We develop a new analysis of electrically driven spin resonance exploiting fixed physical characteristics of the nanotube: a bend and inhomogeneous disorder. The spectrum is simulated for an electron valley-spin qubit coupled to a hole valley-spin qubit and an impurity electron spin, and features that coincide with a recent measurement are identified. We show that the same mechanism allows resonant control of the full four-dimensional spin-valley space.

arXiv comment11 pages, 7 figures

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• Non-collinear spin-orbit magnetic fields in a carbon nanotube double quantum dot
• Shape-sensitive Pauli blockade in a bent carbon nanotube
• Nanoscale magnetic resonance spectroscopy using a carbon nanotube double quantum dot
• Spin-orbit interaction in bent carbon nanotubes: resonant spin transitions
• Two-electron n-p double quantum dots in carbon nanotubes
• Spin-valley dynamics of electrically driven ambipolar carbon-nanotube quantum dots
• Nanotube Double Quantum Dot Spin Transducer for Scalable Quantum Information Processing
• Electronic structure of (1e,1h) states of carbon nanotube quantum dots