Journal articles
Evaluation of overlaps between arbitrary fermionic quasiparticle vacua
Abstract : We derive an expression that allows for the unambiguous evaluation of the overlap between two arbitrary quasiparticle vacua, including its sign. Our expression is based on the Pfaffian of a skew-symmetric matrix, extending the overlap formula recently proposed by Robledo [ Phys. Rev. C 79 021302 (2009)] to the most general case of quasiparticle vacua, including the one of the overlap between two different blocked n-quasiparticle states for either even or odd systems. The powerfulness of the method is illustrated for a few typical matrix elements that appear in realistic angular-momentum-restored generator coordinate method calculations when breaking time-reversal invariance and using the full model space of occupied single-particle states.
http://hal.in2p3.fr/in2p3-00687083
Contributor : Nathalie Martin <>
Submitted on : Thursday, April 12, 2012 - 10:58:37 AM
Last modification on : Thursday, December 3, 2020 - 9:40:03 PM
Contributor : Nathalie Martin <>
Submitted on : Thursday, April 12, 2012 - 10:58:37 AM
Last modification on : Thursday, December 3, 2020 - 9:40:03 PM
Links full text
