433 citations · 4.1k across the 129 of their papers we have counts for
6 papers · 1 filter
Relaxation of the Electron Spin in Quantum Dots Via One- and Two-Phonon Processes
C. Calero, E. M. Chudnovsky, D. A. Garanin
We have studied direct and Raman processes of the decay of electron spin states in a quantum dot via radiation of phonons corresponding to elastic twists. Universal dependence of t…
Towards Microscopic Understanding of the Phonon Bottleneck
D. A. Garanin
The problem of the phonon bottleneck in the relaxation of two-level systems (spins) to a narrow group of resonant phonons via emission-absorption processes is investigated from the…
Magnetization reversal and nonexponential relaxation via instabilities of internal spin waves in nanomagnets
D. A. Garanin, H. Kachkachi, L. Reynaud
A magnetic particle with atomic spins ordered in an unstable direction is an example of a false vacuum that decays via excitation of internal spin waves. Coupled evolution of the p…
Nonadiabatic Transitions for a Decaying Two-Level-System: Geometrical and Dynamical Contributions
R. Schilling, Mark Vogelsberger, D. A. Garanin
We study the Landau-Zener Problem for a decaying two-level-system described by a non-hermitean Hamiltonian, depending analytically on time. Use of a super-adiabatic basis allows to…
Two-phonon spin-lattice relaxation of rigid atomic clusters
C. Calero, E. M. Chudnovsky, D. A. Garanin
Spin-phonon relaxation due to two-phonon processes of a spin cluster embedded in an elastic medium has been studied. For the case of uniaxial anisotropy, relaxation rates due to Ra…
Phonon-induced relaxation of a two-state system in solids
Jaroslav Albert, E. M. Chudnovsky, D. A. Garanin
We study phonon-induced relaxation of quantum states of a particle (e.g., electron or proton) in a rigid double-well potential in a solid. Relaxation rate due to Raman two-phonon p…