Superposition, Entanglement and Other Oddities

  • Hans Lüth
Part of the Graduate Texts in Physics book series (GTP)


For a fundamental understanding of quantum mechanics, superposition and entanglement of quantum states are essential issues. These phenomena are explained by means of examples including the scattering of two identical particles. Special focus is on the quantum mechanical measurement process and on the disappearance of double slit interferences by gaining “Which Way” information. Using the density matrix formalism, open quantum systems and dephasing of coherent quantum states are discussed. This includes a short consideration of Schrödinger’s cat paradox. Important applications in the field of quantum information are presented, in particular the realization of a quantum bit by semiconductor quantum dots.


Density Matrix Reduce Density Matrix Superposition State Spin Orientation Double Slit Experiment 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Hans Lüth
    • 1
  1. 1.Forschungszentrum Jülich GmbH, Peter Grünberg Institut (PGI)PGI-9: Semiconductor Nanoelectronics and Jülich Aachen Research Alliance (JARA)JülichGermany

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