We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Edge exponent in the dynamic spin structure fac...
View graph of relations

« Back

Edge exponent in the dynamic spin structure factor of the Yang-Gaudin model

Research output: Contribution to journalJournal article


Article number201102
<mark>Journal publication date</mark>11/2009
<mark>Journal</mark>Physical Review B
Number of pages4
<mark>Original language</mark>English


The dynamic spin structure factor S(k,omega) of a system of spin-1/2 bosons is investigated at arbitrary strength of the interparticle repulsion. As a function of omega it is shown to exhibit a power-law singularity at the threshold frequency defined by the energy of a magnon at given k. The power-law exponent is found exactly using a combination of the Bethe ansatz solution and an effective-field theory approach.

Bibliographic note

© 2009 The American Physical Society