3 papers
hep-th2025
Toolkit for General 2d Scalar Potential in LCT
A. Liam Fitzpatrick, Emanuel Katz, Yuan Xin
We present efficient algorithms for obtaining the Hamiltonian in Lightcone Conformal Truncation (LCT) for a 2d scalar field with a generic potential. We apply this method to the si…
hep-th2025
Large Momentum EFT and Lightcone Quantization
Hongbin Chen, A. Liam Fitzpatrick, Emanuel Katz +1
We develop methods for computing the effective action at infinite momentum for QFTs at finite volume which do not rely on the theory having a Lagrangian description. We do t…
hep-th2025
Lightcone Hamiltonian for Ising Field Theory I: T < T_c
A. Liam Fitzpatrick, Emanuel Katz, Yuan Xin
We study 2d Ising Field Theory (IFT) in the low-temperature phase in lightcone quantization, and show that integrating out zero modes generates a very compact form for the effectiv…