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RESEARCH PRODUCT
Tuning non-Markovianity by spin-dynamics control
Francesco PlastinaMauro PaternostroSalvatore Lorenzosubject
PhysicsQuantum PhysicsQuantum decoherenceSpin dynamicsCondensed matter physicsFOS: Physical sciencesAtomic and Molecular Physics and OpticsSettore FIS/03 - Fisica Della MateriaCoupling (physics)Quantum mechanicsQuantum open sytem markovianitySymmetric couplingQuantum informationQuantum Physics (quant-ph)Quantum statistical mechanicsControl (linguistics)Spin-½description
We study the interplay between forgetful and memory-keeping evolution enforced on a two-level system by a multi-spin environment whose elements are coupled to local bosonic baths. Contrarily to the expectation that any non-Markovian effect would be buried by the forgetful mechanism induced by the spin-bath coupling, one can actually induce a full Markovian-to-non-Markovian transition of the two-level system's dynamics, controllable by parameters such as the mismatch between the energy of the two-level system and of the spin environment. For a symmetric coupling, the amount of non-Markovianity surprisingly grows with the number of decoherence channels.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-02-13 |