Journal
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 52, Issue 2, Pages 612-619Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-012-1367-4
Keywords
Decoherence; Entanglement protection; Weak measurement
Categories
Funding
- National Natural Science Foundation of China [11004050]
- Chinese Ministry of Education [211119]
- China Postdoctoral Science Foundation [2012M511729]
- Hunan Provincial Education Department [10B013]
- construct program of the key discipline in Hunan province
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Taming decoherence is a critical issue in quantum information science. We here investigate amplitude-damping decoherence suppression of two-qubit entangled states by weak quantum measurements. It is shown that the weak measurements can effectively suppress the decoherence for different initial entangled states. More interestingly, we show that the weak measurements have different effects on the entanglement protection for two entangled states which are equivalent under a local unitary operation. This result implies that the entanglement protection effect could be modulated according to different demands.
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