Quantum coherence and entanglement preservation in Markovian and non-Markovian dynamics via additional qubits
| Autor: | E. Faizi, Bahram Ahansaz, Naghi Behzadi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics Thermal reservoir FOS: Physical sciences Markov process Concurrence Quantum entanglement 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas symbols.namesake Computer Science::Emerging Technologies Qubit 0103 physical sciences Dissipative system symbols Statistical physics Quantum Physics (quant-ph) 010306 general physics Quantum Coherence (physics) |
| Zdroj: | The European Physical Journal D. 71 |
| ISSN: | 1434-6079 1434-6060 |
| DOI: | 10.1140/epjd/e2017-80294-3 |
| Popis: | In this paper, we investigate preservation of quantum coherence of a single-qubit interacting with a zero-temperature thermal reservoir through the addition of noninteracting qubits in the reservoir. Moreover, we extend this scheme to preserve quantum entanglement between two and three distant qubits, each of which interacts with a dissipative reservoir independently. At the long time limit, we obtained analytical expressions for the coherence measure and the concurrence of two and three qubits in terms of the number of additional qubits. It is observed that, by increasing the number of additional qubits in each reservoir, the initial coherence and the respective entanglements are completely protected in both Markovian and non-Markovian regimes. Interestingly, the protection of entanglements occurs even under the individually different behaviors of the reservoirs. 22 pages, 7 figures |
| Databáze: | OpenAIRE |
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