HIP NEWS December 9th 2013
============================
HIP STAFF MEETING (YT-MEETING)
—————————————
Time: Tuesday, December 10th, 2013 at 16:00.
Place: CERN, Geneva, Room 13-2-005.
Agenda:
1. Opening of the meeting
2. Election of the secretary of the meeting and two scrutinizers
of the minutes
3. Status report of the Institute
4. The project structure of the Institute in 2014
5. The budget of the Institute for 2014
6. Mobility compensation for 2014
7. Other matters brought up by the staff
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
——————————————————-
Tuesday 10 December 2013 at 10.15 in A315
Juha Jäykkä (Nordita)
Isospinning hopfions
Abstract:
The problem of constructing internally rotating solitons of fixed angular frequency omega in the Faddeev-Skyrme model is reformulated as a variational problem for an energy-like functional, called pseudoenergy, which depends parametrically on omega. This problem is solved numerically using a gradient descent method, without imposing any spatial symmetries on the solitons, and the dependence of the solitons’ energy on omega, and on their conserved total isospin J. It is found that, generically, the shape of a soliton is independent of omega, and that its size grows monotonically with omega. A simple elastic rod model of time-dependent hopfions is developed which, despite having only one free parameter, accounts well for most of the numerical results.
VISITORS
———
S. Niyogi 15.9.-15.12 (KH)