Tunneling with dissipation and decoherence for a large spin

Abstract

We present rigorous solution of problems of tunneling with dissipation and decoherence for a spin of an atom or a molecule in an isotropic solid matrix. Our approach is based upon switching to a rotating coordinate system coupled to the local crystal field. We show that the spin of a molecule can be used in a qubit only if the molecule is strongly coupled with its atomic environment. This condition is a consequence of the conservation of the total angular momentum (spin + matrix), that has been largely ignored in previous studies of spin tunneling.

4 pages

References in corpus (4)

• Spin tunneling via dislocations in Mn-12 acetate crystals
• Crossover between Thermally Assisted and Pure Quantum Tunneling in Molecular Magnet Mn12-Acetate
• Dislocation-induced spin tunneling in Mn-12 acetate
• A Distribution of Tunnel Splittings in Mn${}_{12}$-Acetate

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• Magnetic nanoparticle traveling in external magnetic field
• Magneto-elastic waves in crystals of magnetic molecules
• Two-phonon spin-lattice relaxation of rigid atomic clusters
• Macroscopic quantum effects generated by the acoustic wave in a molecular magnet
• Decoherence of a Superposition of Macroscopic Current States in a SQUID
• Rotational Doppler Effect in Magnetic Resonance
• Quantum dynamics of crystals of molecular nanomagnets inside a resonant cavity
• Reply to "Comment on Universal Decoherence in Solids"