AI Article Synopsis
- The study focuses on how the spin of an electron in a carbon nanotube quantum dot can be influenced by its vibrational motion due to spin-orbit coupling.
- The research suggests that a quantum dot with an odd number of electrons can effectively act as a system described by the Jaynes-Cummings model, which is significant in quantum electrodynamics when in strong-coupling conditions.
- It identifies two unique two-level energy states for qubits, depending on the strength of an external magnetic field, enabling advanced detection and control of spin qubits for potential improvements in sensing technologies.
Article Abstract
We theoretically investigate the deflection-induced coupling of an electron spin to vibrational motion due to spin-orbit coupling in suspended carbon nanotube quantum dots. Our estimates indicate that, with current capabilities, a quantum dot with an odd number of electrons can serve as a realization of the Jaynes-Cummings model of quantum electrodynamics in the strong-coupling regime. A quantized flexural mode of the suspended tube plays the role of the optical mode and we identify two distinct two-level subspaces, at small and large magnetic field, which can be used as qubits in this setup. The strong intrinsic spin-mechanical coupling allows for detection, as well as manipulation of the spin qubit, and may yield enhanced performance of nanotubes in sensing applications.
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| http://dx.doi.org/10.1103/PhysRevLett.108.206811 | DOI Listing |
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