Requirement of system–reservoir bound states for entanglement protection
| Autor: | E. Faizi, Naghi Behzadi, H. Kasani, Bahram Ahansaz |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Work (thermodynamics) 010308 nuclear & particles physics Spectral density Statistical and Nonlinear Physics Concurrence Quantum Physics Quantum entanglement 01 natural sciences Theoretical Computer Science Electronic Optical and Magnetic Materials Modeling and Simulation Qubit 0103 physical sciences Signal Processing Bound state Dissipative system Statistical physics Electrical and Electronic Engineering 010306 general physics Quantum computer |
| Zdroj: | Quantum Information Processing. 17 |
| ISSN: | 1573-1332 1570-0755 |
| DOI: | 10.1007/s11128-018-1833-x |
| Popis: | In this work, a genuine mechanism for entanglement protection of a two- qubit system interacting with a dissipative common reservoir is investigated. Based on generating a bound state for the system–reservoir, we show that stronger bound state in the energy spectrum can be created by adding another non-interacting qubits into the reservoir. It turns out that obtaining higher degrees of boundedness in the energy spectrum leads to a better protection of two-qubit entanglement against the dissipative noises. Also, it is figured out that the formation of bound state not only exclusively determines the long-time entanglement protection, irrespective to the Markovian and non-Markovian dynamics, but also performs the same task for reservoirs with different spectral densities. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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