Temperature can enhance coherent oscillations at a Landau-Zener transition

Abstract

We consider sweeping a system through a Landau-Zener avoided-crossing, when that system is also coupled to an environment or noise. Unsurprisingly, we find that decoherence suppresses the coherent oscillations of quantum superpositions of system states, as superpositions decohere into mixed states. However, we also find an effect we call "Lamb-assisted coherent oscillations", in which a Lamb shift exponentially enhances the coherent oscillation amplitude. This dominates for high-frequency environments such as super-Ohmic environments, where the coherent oscillations can grow exponentially as either the environment coupling or temperature are increased. The effect could be used as an experimental probe for high-frequency environments in such systems as molecular magnets, solid-state qubits, spin-polarized gases (neutrons or He3) or Bose-condensates.

4 Pages & 4 Figs - New version: introduction extended & citations added

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Cited by in corpus (24)

• Nonadiabatic Landau-Zener-Stückelberg-Majorana transitions, dynamics, and interference
• Non-perturbative stochastic method for driven spin-boson model
• Markovian Quantum Master Equation beyond Adiabatic Regime
• Resonant Adiabatic Passage with Three Qubits
• Quantum Dynamics of the Driven and Dissipative Rabi Model
• Measurement-assisted Landau-Zener transitions
• Dynamics of dissipative Landau-Zener transitions
• Nonadiabatic Dynamics of a Dissipative Two-level System
• Quantum parameter estimation with the Landau-Zener transition
• Fundamental limitations on photoisomerization from thermodynamic resource theories
• Finite-time Landau-Zener processes and counter-diabatic driving in open systems: beyond Born, Markov and Rotating-wave approximations
• Photon-assisted Landau-Zener transition: Role of coherent superposition states
• Landau-Zener transitions mediated by an environment: population transfer and energy dissipation
• Landau-Zener dynamics of a nanoresonator containing a tunneling spin
• Landau-Zener transition in a two-level system coupled to a single highly-excited oscillator
• Suppression of the Landau-Zener transition probability by a weak classical noise
• Landau-Zener-Stueckelberg physics with a singular continuum of states
• Landau-Zener transition driven by a slow noise
• Secular master equation for adiabatically time dependent systems
• Time dependent Markovian master equation beyond the adiabatic limit
• Landau-Zener transitions in a fermionic dissipative environment
• Optimal population transfer using the adiabatic rapid passage in the presence of drive-induced dissipation
• Landau-Zener transition between two levels coupled to continuum
• Excitable quantum systems: the bosonic avalanche laser