Giving Hamiltonian Truncation a Boost

A. Liam Fitzpatrick; Emanuel Katz; Hongbin Chen; Yuan Xin

Giving Hamiltonian Truncation a Boost

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arxiv 2207.01659 v1 pith:AUVX25UZ submitted 2022-07-04 hep-th cond-mat.str-el

Giving Hamiltonian Truncation a Boost

Hongbin Chen , A. Liam Fitzpatrick , Emanuel Katz , Yuan Xin This is my paper

classification hep-th cond-mat.str-el

keywords hamiltoniantruncationvolumeallowsbecomeboostboostedconsider

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We study Hamiltonian truncation in boosted frames. We consider the thermal and magnetic field deformations of the 2d Ising model using TCSA at finite momentum. We find that even with moderate momenta, the spectrum and time-dependent correlation functions become significantly less dependent on the volume of the system. This allows for a more reliable determination of infinite volume observables.

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Higher-order structure of Hamiltonian truncation effective theory
hep-ph 2026-02 conditional novelty 6.0

All-order local and O(Emax⁻⁴) non-local corrections are derived for Hamiltonian truncation effective theory of 2D λφ⁴; numerically, NNLO barely improves on NLO.