English

Entanglement entropy of multipartite pure states

Quantum Physics 2009-11-07 v3

Abstract

Consider a system consisting of nn dd-dimensional quantum particles and arbitrary pure state Ψ\Psi of the whole system. Suppose we simultaneously perform complete von Neumann measurements on each particle. One can ask: what is the minimal possible value S[Ψ]S[\Psi] of the entropy of outcomes joint probability distribution? We show that S[Ψ]S[\Psi] coincides with entanglement entropy for bipartite states. We compute S[Ψ]S[\Psi] for two sample multipartite states: the hexacode state (n=6,d=2n=6, d=2) and determinant states (n=dn=d). The generalization of determinant states to the case d<nd<n is considered.

Cite

@article{arxiv.quant-ph/0205021,
  title  = {Entanglement entropy of multipartite pure states},
  author = {Sergei Bravyi},
  journal= {arXiv preprint arXiv:quant-ph/0205021},
  year   = {2009}
}

Comments

7 pages, REVTeX, corrected some typos