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density matrix (Definition)
Definition 1.1   A density matrix $\rho$ is a matrix representing the density operator with the conditions:
  1. The trace of $\rho$ is $1$.
  2. $\rho$ is a positive-semidefinite matrix

References

[1] MIT OpenCourseWare, 8.371J Quantum Information Science, Spring 2006.

[2]Blum, Karl, Density Matrix Theory and Applications. 2nd edition Springer, 1996.



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Cross-references: trace, operator, matrix

This is version 1 of density matrix, born on 2009-02-10.
Object id is 505, canonical name is DensityMatrix.
Accessed 750 times total.

Classification:
Physics Classification: 03.67.-a (Quantum information)
Pending Errata and Addenda
None.
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