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