Sökning: id:"swepub:oai:DiVA.org:oru-65578" >
Uniform semiclassic...
-
Brack, M.Institut für Theoretische Physik, Universität Regensburg, Regensburg, Germany
(författare)
Uniform semiclassical trace formula for U(3) → SO(3) symmetry breaking
- Artikel/kapitelEngelska2005
Förlag, utgivningsår, omfång ...
-
2005-11-02
-
Institute of Physics (IOP),2005
-
printrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:oru-65578
-
https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-65578URI
-
https://doi.org/10.1088/0305-4470/38/46/004DOI
-
https://lup.lub.lu.se/record/211535URI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
We develop a uniform semiclassical trace formula for the density of states of a three-dimensional isotropic harmonic oscillator (HO), perturbed by a term . This term breaks the U(3) symmetry of the HO, resulting in a spherical system with SO(3) symmetry. We first treat the anharmonic term for small ε in semiclassical perturbation theory by integration of the action of the perturbed periodic HO orbit families over the manifold which is covered by the parameters describing their four-fold degeneracy. Then, we obtain an analytical uniform trace formula for arbitrary ε which in the limit of strong perturbations (or high energy) asymptotically goes over into the correct trace formula of the full anharmonic system with SO(3) symmetry, and in the limit ε (or energy) →0 restores the HO trace formula with U(3) symmetry. We demonstrate that the gross-shell structure of this anharmonically perturbed system is dominated by the two-fold degenerate diameter and circular orbits, and not by the orbits with the largest classical degeneracy, which are the three-fold degenerate tori with rational ratios ωr:ωφ ≤ N:M of radial and angular frequencies. The same holds also for the limit of a purely quartic spherical potential V(r) ∝ r4.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Ögren, Magnus,1977-Lund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)matf-mog
(författare)
-
Yu, YongleLund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)matf-yly
(författare)
-
Reimann, StephanieLund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)matf-sre
(författare)
-
Institut für Theoretische Physik, Universität Regensburg, Regensburg, GermanyMatematisk fysik
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Journal of Physics A: Institute of Physics (IOP)38:46, s. 9941-99670305-44701361-6447
Internetlänk
Hitta via bibliotek
Till lärosätets databas