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, …, *H**N* the compound multipartite system is described by the tensor product of the Hilbert spaces, *H* = *H*1 ⊗ *H*2 ⊗ … ⊗ *H**N*. State vectors and density operators on *H* are called *multipartite quantum states*.

### See also

### External links

- Tripartite in Wiktionary

Category:Handbook of Quantum Information Category:Mathematical Structure

## Last modified:

Monday, October 26, 2015 - 17:56