Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.042505
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Funding
- U.S. Department of Energy [DE-FG02-00ER41132]
- National Science Foundation [PHY-0835543]
- MICINN (Spain) [FPA2009-08958, FIS2009-07277]
- CPAN [CSD2007-00042]
- MULTIDARK [CSD2009-00064]
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We present a Pfaffian formula for projection and symmetry restoration for wave functions of the general Bogoliubov form, including quasiparticle excited states and linear combinations of them. This solves a long-standing problem in calculating states of good symmetry, arising from the sign ambiguity of the commonly used determinant formula. A simple example is given of projecting a good particle number and angular momentum from a Bogoliubov wave function in the Fock space of a single j-shell.
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