Exponential speedup of incoherent tunneling via dissipation
arXiv:2102.02660 · doi:10.1103/PhysRevResearch.3.033019
Abstract
We study the escape rate of a particle in a metastable potential in presence of a dissipative bath coupled to the momentum of the particle. Using the semiclassical bounce technique, we find that this rate is exponentially enhanced. In particular, the influence of momentum dissipation depends on the slope of the barrier that the particle is tunneling through. We investigate also the influence of dissipative baths coupled to the position, and to the momentum of the particle, respectively. In this case the rate exhibits a non-monotonic behavior as a function of the dissipative coupling strengths. Remarkably, even in presence of position dissipation, momentum dissipation can enhance exponentially the escape rate in a large range of the parameter space. The influence of the momentum dissipation is also witnessed by the substantial increase of the average energy loss during inelastic (environment-assisted) tunneling.
References in corpus (22)
- Adiabatic Quantum Computing
- Environment-Assisted Quantum Walks in Photosynthetic Energy Transfer
- Dephasing assisted transport: Quantum networks and biomolecules
- Perspectives of quantum annealing: Methods and implementations
- What is the Computational Value of Finite Range Tunneling?
- The high-coherence fluxonium qubit
- Environment-assisted quantum transport in a 10-qubit network
- Decoherence in adiabatic quantum computation
- Circuit Quantum Electrodynamics of Granular Aluminum Resonators
- Temperature scaling law for quantum annealing optimizers
- Optimization by Quantum Annealing: Lessons from Simple Cases
- Finite temperature quantum annealing solving exponentially small gap problem with non-monotonic success probability
- Quantum thermodynamics of systems with anomalous dissipative coupling
- Open system quantum annealing in mean field models with exponential degeneracy
- Quantum phase transition with dissipative frustration
- Dissipative quantum oscillator with two competing heat baths
- Quantum Speed-Up at Zero Temperature via Coherent Catalysis
- Coherent dynamics in long fluxonium qubits
- Reentrant enhancement of quantum fluctuations for symmetric environmental coupling
- Non-equilibrium dynamics of a system with Quantum Frustration
- Dissipation-induced enhancement and squeezing of quantum fluctuations
- Effects of a dissipative coupling to the momentum of a particle in a double well potential