One-qubit reduced states of a pure many-qubit state: Polygon inequalities

A Higuchi; A Sudbery; J Szulc

doi:10.1103/PhysRevLett.90.107902

One-qubit reduced states of a pure many-qubit state: Polygon inequalities

A Higuchi, A Sudbery, J Szulc

Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

We show that a necessary and sufficient condition for a set of n one-qubit mixed states to be the reduced states of a pure n-qubit state is that their smaller eigenvalues should satisfy polygon inequalities: each of them must be no greater than the sum of the others.

Original language	English
Article number	107902
Pages (from-to)	-
Number of pages	3
Journal	Physical Review Letters
Volume	90
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.90.107902
Publication status	Published - 14 Mar 2003

Keywords

3-QUBIT

Access to Document

10.1103/PhysRevLett.90.107902

http://dx.doi.org/10.1103/PhysRevLett.90.107902

Cite this

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