Exploring Hamiltonian truncation in d=2+1
Exploring Hamiltonian truncation in
d=2+1
复制标题
探索 d=2 1 中的哈密顿截断
DOI:
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
Edward Hardy
中科院分区:
文献类型:
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作者:
J. Miró;Edward Hardy
We initiate the application of Hamiltonian Truncation methods to solve strongly coupled QFTs in $d=2+1$. By analysing perturbation theory with a Hamiltonian Truncation regulator, we pinpoint the challenges of such an approach and propose a way that these can be addressed. This enables us to formulate Hamiltonian Truncation theory for $phi^4$ in $d=2+1$, and to study its spectrum at weak and strong coupling. The results obtained agree well with the predictions of a weak/strong self-duality possessed by the theory. The $phi^4$ interaction is a strongly relevant UV divergent perturbation, and represents a case study of a more general scenario. Thus, the approach developed should be applicable to many other QFTs of interest.