| Speaker: | Jedidiah Oliver Thompson (Stanford University) |
|---|---|
| Title: | Towards a nonperturbative construction of the S-matrix |
| Date (JST): | Wed, Mar 29, 2023, 13:30 - 15:00 |
| Place: | Seminar Room A |
| Abstract: | I will explain how to use approximate knowledge of a QFT’s energy eigenstates to compute amplitudes for particle scattering at strong coupling. I will discuss the general framework, which is applicable to a wide range of theories, and then focus on the specific example of the 2+1d massive O(N) model at large N, where I will use approximate spectral data obtained with Hamiltonian truncation. Along with the amplitude in the physical region, it is possible to analytically continue to the entire complex Mandelstam plane, and in fact numerical convergence can be even better away from the physical region. Finally, I will comment on future directions and the conceptual steps still required to use these techniques for more complex theories such as QCD. |
| Remarks: | Hybrid (Seminar room A & Zoom) |
