, Volume 63, Issue 1, pp 51–56 | Cite as

Interfering with the neutron spin

  • Apoorva G. Wagh
  • Veer Chand Rakhecha


Charge neutrality, a spin 1/2 and an associated magnetic moment of the neutron make it an ideal probe of quantal spinor evolutions. Polarized neutron interferometry in magnetic field Hamiltonians has thus scored several firsts such as direct verification of Pauli anticommutation, experimental separation of geometric and dynamical phases and observation of non-cyclic amplitudes and phases. This paper provides a flavour of the physics learnt from such experiments.


Neutron interferometry spinor Pauli anticommutation geometic phase non-cyclic evolution Pancharatnam connection neutron polarimetry 


03.65.Bz 03.75.Dg 42.25.Hz 42.25.Ja 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    A G Wagh and V C Rakhecha,Prog. Part. Nucl. Phys. 37, 485 (1996)CrossRefGoogle Scholar
  2. [2]
    H Rauch and S A Werner,Neutron interferometry: Lessons in experimental quantum mechanics (Oxford Univ. Press, UK, 2000)Google Scholar
  3. [3]
    A G Wagh,Phys. Lett. A146, 369 (1990)ADSGoogle Scholar
  4. [3a]
    A G Wagh and V C Rakhecha,Phys. Lett. A148, 17 (1990)ADSGoogle Scholar
  5. [4]
    S Pancharatnam,Proc. Indian Acad. Sci. (Math. Sci.) A44, 247 (1956)MathSciNetGoogle Scholar
  6. [5]
    M V Berry,Proc. R. Soc. London A392, 45 (1984)ADSMathSciNetGoogle Scholar
  7. [5a]
    Y Aharonov and J Anandan,Phys. Rev. Lett. 58, 1593 (1987)CrossRefADSMathSciNetGoogle Scholar
  8. [5b]
    Geometric phases in physics edited by A Shapere and F Wilczek (World Scientific, Singapore, 1989)MATHGoogle Scholar
  9. [6]
    A G Wagh, V C Rakhecha, J Summhammer, G Badurek, H Weinfurter, B E Allman, H Kaiser, K Hamacher, D L Jacobson and S A Werner,Phys. Rev. Lett. 78, 755 (1997);J. Phys. Soc. Jpn. 65 (Suppl. A) 73 (1996);Phys. Rev. A56, 4420 (1997)CrossRefADSGoogle Scholar
  10. [7]
    A G Wagh, G Badurek, V C Rakhecha, R J Buchelt and A Schricker,Phys. Lett. A268, 209 (2000)ADSGoogle Scholar
  11. [8]
    A G Wagh and V C Rakhecha,Phys. Lett. A197, 107 & 112 (1995)Google Scholar
  12. [9]
    A G Wagh, V C Rakhecha, P Fischer and A Ioffe,Phys. Rev. Lett. 81, 1992 (1998);Phys. Rev. Lett. 83, 2090 (1999)CrossRefADSGoogle Scholar

Copyright information

© Indian Academy of Sciences 2004

Authors and Affiliations

  • Apoorva G. Wagh
    • 1
  • Veer Chand Rakhecha
    • 1
  1. 1.Solid State Physics DivisionBhabha Atomic Research CentreMumbaiIndia

Personalised recommendations