Something is said to '''multipartite''' if it consists two or more distinct parts. If there are only two parts it is called bipartite, if there are three it is '''tripartite''' and something consisting of $N$ parts is called '''N-partite'''.
In quantum information science it is often quantum systems that are shared between a number of parties, usually spatially separated and sometimes called Alice, Bob, Charlie, etc.
If the subsystems are described by the Hilbert spaces $H\_1,\; H\_2,\; \backslash ldots,\; H\_N$ the compound multipartite system is described by the tensor product of the Hilbert spaces, $H\; =\; H\_1\; \backslash otimes\; H\_2\; \backslash otimes\; \backslash ldots\; \backslash otimes\; H\_N$. State vectors and density operators on $H$ are called ''multipartite quantum states''.
== See also ==
* Bipartite
* Tensor product
== External links ==
* [http://en.wiktionary.org/wiki/tripartite Tripartite] in Wiktionary
Category:Handbook of Quantum Information
Category:Mathematical Structure

## Last modified:

Monday, October 26, 2015 - 17:56