English

Berry phase and entanglement of 3 qubits in a new Yang-Baxter system

Quantum Physics 2009-08-24 v1

Abstract

In this paper we construct a new 8×88\times8 M\mathbb{M} matrix from the 4×44\times4 MM matrix, where M\mathbb{M} / MM is the image of the braid group representation. The 8×8 8\times8 M\mathbb{M} matrix and the 4×44\times4 MM matrix both satisfy extraspecial 2-groups algebra relations. By Yang-Baxteration approach, we derive a unitary R˘(θ,ϕ) \breve{R}(\theta, \phi) matrix from the M\mathbb{M} matrix with parameters ϕ\phi and θ\theta. Three-qubit entangled states can be generated by using the R˘(θ,ϕ)\breve{R}(\theta,\phi) matrix. A Hamiltonian for 3 qubits is constructed from the unitary R˘(θ,ϕ)\breve{R}(\theta,\phi) matrix. We then study the entanglement and Berry phase of the Yang-Baxter system.

Keywords

Cite

@article{arxiv.0904.3621,
  title  = {Berry phase and entanglement of 3 qubits in a new Yang-Baxter system},
  author = {Taotao Hu and Chunfeng Wu and Kang Xue},
  journal= {arXiv preprint arXiv:0904.3621},
  year   = {2009}
}