Experimental study of entanglement evolution in the presence of bit-flip and phase-shift noises

• Published in: Optics and laser technology Vol. 95; pp. 147 - 150
• Main Authors: Liu, Xia, Cao, Lian-Zhen, Zhao, Jia-Qiang, Yang, Yang, Lu, Huai-Xin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2017; Elsevier BV
• Subjects: Bit-flip noise; Decay rate; Decoherence; Depolarization; Entanglement evolution; Evolution; Noise; Phase shift; Phase-shift noise; Quantum channel; Quantum entanglement; Quantum phenomena; Quantum physics; Quantum theory; Qubits (quantum computing); Entanglement evolution; Decoherence; Phase-shift noise; Quantum channel; Bit-flip noise
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2017.04.014

•We experimentally simulate the bit-flip and phase-shift noises using the linear optical system.•We first give the experimental rules of entangled qubits at collective (non-collective) bit-flip and phase-shift noises.•Our work provides an new insights into the evolution of quantum correlation in open systems. Because of its important role both in fundamental theory and applications in quantum information, evolution of entanglement in a quantum system under decoherence has attracted wide attention in recent years. In this paper, we experimentally generate a high-fidelity maximum entangled two-qubit state and present an experimental study of the decoherence properties of entangled pair of qubits at collective (non-collective) bit-flip and phase-shift noises. The results shown that entanglement decreasing depends on the type of the noises (collective or non-collective and bit-flip or phase-shift) and the number of qubits which are subject to the noise. When two qubits are depolarized passing through non-collective noisy channel, the decay rate is larger than that depicted for the collective noise. When two qubits passing through depolarized noisy channel, the decay rate is larger than that depicted for one qubit.