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Cyclic phases at an n-fold degeneracy

Abstract:
We study the sets of possible sign changes that can occur when n real quantum states are transported adiabatically around an n-fold degeneracy. The allowed sign changes include those predicted by the familiar spin j = (n - 1)/2 model as a subset, but we also find at least one other possible set of sign changes for each n > 2. Experimentally verifiable quadrilateral billiard examples are presented to illustrate these additional possibilities for 3- and 4-fold degeneracies.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevLett.82.2223

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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Role:
Author
Journal:
PHYSICAL REVIEW LETTERS
Volume:
82
Issue:
11
Pages:
2223-2227
Publication date:
1999-03-15
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:da1f469e-1865-434d-b4fd-2b770a3511fc
Source identifiers:
36953
Local pid:
pubs:36953
Language:
English

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