Probing strong correlations with light scattering: Example of the quantum Ising model
Journal Article
·
· Physical Review B
- Yerevan Physics Inst., Yerevan (Armenia); Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte (Brazil)
- Free University of Berlin, Berlin (Germany). Inst. for Theoretical Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
In this article we calculate the nonlinear susceptibility and the resonant Raman cross section for the paramagnetic phase of the ferromagnetic quantum Ising model in one dimension. In this region the spectrum of the Ising model has a gap m. The Raman cross section has a strong singularity when the energy of the outgoing photon is at the spectral gap ωf ≈ m and a square root threshold when the frequency difference between the incident and outgoing photons ωi₋ωf≈2m. Finally, the latter feature reflects the fermionic nature of the Ising model excitations.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; AC02-98CH10886
- OSTI ID:
- 1336169
- Alternate ID(s):
- OSTI ID: 1330485
- Report Number(s):
- BNL-113143-2016-JA; PRBMDO; R&D Project: PO015
- Journal Information:
- Physical Review B, Vol. 94, Issue 15; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 3 works
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