Doublon lifetimes in dissipative environments

Abstract

We study the dissipative decay of states with a doubly occupied site in a two-electron Hubbard model, known as doublons. For the environment we consider charge and current noise which are modelled as a bosonic heat bath that couples to the onsite energies and the tunnel couplings, respectively. It turns out that the dissipative decay depends qualitatively on the type of environment as for charge noise, the life time grows with the electron-electron interaction. For current noise, by contrast, doublons become increasingly unstable with larger interaction. Numerical studies within a Bloch-Redfield approach are complemented by analytical estimates for the decay rates. For typical quantum dot parameters, we predict that the doublon life times up to 50 ns.

References in corpus (7)

• Many-Body Physics with Ultracold Gases
• Repulsively bound atom pairs in an optical lattice
• Strongly Correlated Quantum Walks in Optical Lattices
• Scalable gate architecture for densely packed semiconductor spin qubits
• Two-particle states in the Hubbard model
• Intrinsic phonon decoherence and quantum gates in coupled lateral quantum dot charge qubits
• NOON States via Quantum Walk of Bound Particles

Cited by in corpus (5)

• Topology and interactions in the photonic Creutz and Creutz-Hubbard ladders
• Coherent long-range transfer of two-electron states in ac-driven triple quantum dots
• Temperature-dependent broadening of coherent current peaks in InAs double quantum dots
• Exceptional points for photon pairs bound by nonlinear dissipation in cavity arrays
• Radiative Decay of Bound Electron Pairs in Two-Dimensional Topological Insulators