Reduction of entropic uncertainty in entangled qubits system by local 𝒫𝒯-symmetric operation
Shi-Yang Zhang, Mao-Fa Fang, Yanliang Zhang, You-neng Guo, Yan-Jun Zhao, Wu-Wei Tang · Chinese Physics B · 2015
We investigate the quantum-memory-assisted entropic uncertainty for an entangled two-qubit system in a local quantum noise channel with -symmetric operation performing on one of the two particles. Our results show that the quantum-memory-assisted entropic uncertainty in the qubits system can be reduced effectively by the local -symmetric operation. Physical explanations for the behavior of the quantum-memory-assisted entropic uncertainty are given based on the property of entanglement of the qubits system and the non-locality induced by the re-normalization procedure for the non-Hermitian -symmetric operation.