Protecting free-entangled and bound-entangled states in a two-qutrit system under decoherence using weak measurements
| Autor: | Mao-Fa Fang, Xiang-Ping Liao, Xin Zhou, Man-Sheng Rong |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Quantum decoherence Negativity effect Quantum Physics 01 natural sciences Sudden death Atomic and Molecular Physics and Optics 010305 fluids & plasmas Amplitude Quantum mechanics Quantum electrodynamics 0103 physical sciences Weak measurement Qutrit 010306 general physics Constant (mathematics) |
| Zdroj: | Journal of Modern Optics. 64:1184-1191 |
| ISSN: | 1362-3044 0950-0340 |
| DOI: | 10.1080/09500340.2016.1271149 |
| Popis: | We demonstrate a method to protect free-entangled and bound-entangled states in a two-qutrit system under amplitude damping and the generalized amplitude damping channels based on measurement reversal from weak measurement. We find that this scheme can circumvent the distillability sudden death by changing weak measurement strength and the free-entangled and bound-entangled states can be robust against decoherence in amplitude damping case. Moreover, the negativity and realignment negativity almost tend to a constant respectively in spite of sufficiently strong decoherence when weak measurement strength is strong. We also show that under the generalized amplitude damping, the life of free-entangled and bound-entangled states can be prolonged using weak measurements in certain conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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