Tunneling of bosonic qubits under local dephasing through microscopic approach
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917320161492992 |
|---|---|
| author | Ferrara, Alberto Nosrati, Farzam Smirne, Andrea Piilo, Jyrki Franco, Rosario Lo |
| author_facet | Ferrara, Alberto Nosrati, Farzam Smirne, Andrea Piilo, Jyrki Franco, Rosario Lo |
| contents | We present a microscopic derivation of a master equation for two-component bosons (bosonic qubits) which tunnel between spatially separated modes under local dephasing noise. Starting from the full system-bath Hamiltonian with Lorentzian coupling distributions, we analytically obtain a time-local master equation whose structure reveals intrinsic non-Markovian features and recovers the standard phenomenological dephasing model in the short-time limit. Comparison with exact pseudomode simulations confirms its validity beyond weak-coupling and Markovian regimes. We identify a resonance condition between tunneling and bath frequencies for which dephasing drives the system towards correlated steady states, stabilizing coherence and entanglement instead of suppressing them. These results establish a rigorous microscopic foundation for dephasing models in bosonic tunneling systems and reveal a noise-induced mechanism for steady-state entanglement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_05704 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tunneling of bosonic qubits under local dephasing through microscopic approach Ferrara, Alberto Nosrati, Farzam Smirne, Andrea Piilo, Jyrki Franco, Rosario Lo Quantum Physics We present a microscopic derivation of a master equation for two-component bosons (bosonic qubits) which tunnel between spatially separated modes under local dephasing noise. Starting from the full system-bath Hamiltonian with Lorentzian coupling distributions, we analytically obtain a time-local master equation whose structure reveals intrinsic non-Markovian features and recovers the standard phenomenological dephasing model in the short-time limit. Comparison with exact pseudomode simulations confirms its validity beyond weak-coupling and Markovian regimes. We identify a resonance condition between tunneling and bath frequencies for which dephasing drives the system towards correlated steady states, stabilizing coherence and entanglement instead of suppressing them. These results establish a rigorous microscopic foundation for dephasing models in bosonic tunneling systems and reveal a noise-induced mechanism for steady-state entanglement. |
| title | Tunneling of bosonic qubits under local dephasing through microscopic approach |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.05704 |