The Density Matrix

  • János A. Bergou
  • Mark Hillery
Part of the Graduate Texts in Physics book series (GTP)


We are going to require a more general description of a quantum state than that given by a state vector. The density matrix provides such a description. Its use is required when we are discussing an ensemble of pure states or when we are describing a subsystem of a larger system.


Schmidt Decomposition Bipartite State Pure State Density Matrices Ensemble Interpretation Convex Sum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    A. Peres, Quantum Theory: Concepts and Methods (Kluwer Academic Publishers, Dordrecht, 1995)Google Scholar
  2. 2.
    M. Nielsen, I. Chuang, Quantum Computation and Quantum Information (Cambridge University Press, Cambridge, 2010)Google Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • János A. Bergou
    • 1
  • Mark Hillery
    • 1
  1. 1.Department of Physics and AstronomyHunter College City University of New YorkNew YorkUSA

Personalised recommendations