Wigner Function Description of Larmor Interferometry

Martin Suda, Helmut Rauch

Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentationpeer-review


Recent theoretical developments in neutron interferometry have been focussed on the visualization of Schroedinger-cat like states using the Wigner function formal-ism. An analog description can be attained in Larmor interferometry using wave packets. In this paper the neutron spin-echo effect is presented firstly. It is characterized by Larmor precession of the neutron polarization vector in a constant magnetic field. The rotation of the particles can be reversed in a second magnetic field which points into the opposite direction (spin-echo). Secondly we describe the zero-field spin-echo effect making use of the Wigner formalism too. Here a dynamic spin flipper is flipping the polarized particles inelastically and it is shown that the spectra of the neutrons become time-dependent in a subsequent field-free region.
Original languageEnglish
Title of host publicationProceedings of the 5th Wigner Symposium
Number of pages3
Publication statusPublished - 1998
EventProceedings of the 5th Wigner Symposium -
Duration: 1 Jan 1998 → …


ConferenceProceedings of the 5th Wigner Symposium
Period1/01/98 → …

Research Field

  • Not defined


  • Larmor-Interferometrie
  • Wignerfunktion
  • Zeeman-Effekt
  • Spin-Echo
  • Schrödinger-Katzen-Zustände
  • Magnetfelder
  • Polarisation von Neutronen
  • Neutroneninterferometrie
  • Larmor-interferometry
  • Wigner function
  • Zeeman effect
  • Spin-echo
  • Schroedinger-cat-like stat


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