2021-05-12T16:39:24Z
https://digital.csic.es/dspace-oai/request
oai:digital.csic.es:10261/102732
2016-02-18T02:49:53Z
com_10261_135
com_10261_4
col_10261_388
2014-09-30T14:12:56Z
urn:hdl:10261/102732
A generalized Beraha conjecture for non-planar graphs
Jacobsen, Jesper Lykke
Salas, Jesús
Berker–Kadanoff phase
Transfer matrix
Generalized Petersen graphs
Beraha conjecture
Non-planar graphs
Potts model
We study the partition function ZG(nk,k)(Q,v) of the Q-state Potts model on the family of (non-planar) generalized Petersen graphs G(nk, k). We study its zeros in the plane (Q,v) for 1≤k≤7. We also consider two specializations of ZG(nk,k), namely the chromatic polynomial PG(nk,k)(Q) (corresponding to v=-1), and the flow polynomial ΦG(nk,k)(Q) (corresponding to v=-Q). In these two cases, we study their zeros in the complex Q-plane for 1≤k≤7. We pay special attention to the accumulation loci of the corresponding zeros when n→∞. We observe that the Berker-Kadanoff phase that is present in two-dimensional Potts models, also exists for non-planar recursive graphs. Their qualitative features are the same; but the main difference is that the role played by the Beraha numbers for planar graphs is now played by the non-negative integers for non-planar graphs. At these integer values of Q, there are massive eigenvalue cancellations, in the same way as the eigenvalue cancellations that happen at the Beraha numbers for planar graphs. © 2013 Elsevier B.V.
2014-09-30T14:12:56Z
2014-09-30T14:12:56Z
2013
2014-09-30T14:12:57Z
preprint
Nuclear Physics B 875: 678- 718 (2013)
http://hdl.handle.net/10261/102732
http://dx.doi.org/10.1016/j.nuclphysb.2013.07.012
eng
openAccess
Elsevier