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pro vyhledávání: '"Smith, Philip Boyle"'
Autor:
Smith, Philip Boyle, Zheng, Yunqin
For a fermionic quantum field theory in $d=1+1$ dimensions, there is a subtle difference between summing over spin structures and gauging $(-1)^F$. If the gravitational anomaly vanishes mod 16, then both operations are equivalent and yield a bosonic
Externí odkaz:
http://arxiv.org/abs/2403.03953
We study the scattering of fermions off 't Hooft lines in the Standard Model. A long-standing paradox suggests that the outgoing fermions necessarily carry fractional quantum numbers. In a previous paper, we resolved this paradox in the context of a
Externí odkaz:
http://arxiv.org/abs/2312.17746
We reconsider the problem of electrically charged, massless fermions scattering off magnetic monopoles. The interpretation of the outgoing states has long been a puzzle as, in certain circumstances, they necessarily carry fractional quantum numbers.
Externí odkaz:
http://arxiv.org/abs/2306.07318
Publikováno v:
SciPost Phys. 16, 058 (2024)
We classify two-dimensional purely chiral conformal field theories which are defined on two-dimensional surfaces equipped with spin structure and have central charge less than or equal to 16, and discuss their duality webs. This result can be used to
Externí odkaz:
http://arxiv.org/abs/2303.16917
We study two well-known $SU(N)$ chiral gauge theories with fermions in the symmetric, anti-symmetric and fundamental representations. We give a detailed description of the global symmetry, including various discrete quotients. Recent work argues that
Externí odkaz:
http://arxiv.org/abs/2106.06402
Autor:
Smith, Philip Boyle
The fermionic minimal models are a recently-introduced family of two-dimensional spin conformal field theories. We determine all of their conformal boundary states and potentially anomalous $\mathbb{Z}_2$ global symmetries. The latter task hinges upo
Externí odkaz:
http://arxiv.org/abs/2102.02203
Autor:
Smith, Philip Boyle, Tong, David
Usually, a left-moving fermion in d=1+1 dimensions reflects off a boundary to become a right-moving fermion. This means that, while overall fermion parity $(-1)^F$ is conserved, chiral fermion parity for left- and right-movers individually is not. Re
Externí odkaz:
http://arxiv.org/abs/2006.07369
Autor:
Smith, Philip Boyle, Tong, David
Publikováno v:
SciPost Phys. 10, 010 (2021)
Boundary conditions for Majorana fermions in d=1+1 dimensions fall into one of two SPT phases, associated to a mod 2 anomaly. Here we consider boundary conditions for 2N Majorana fermions that preserve a $U(1)^N$ symmetry. In general, the left-moving
Externí odkaz:
http://arxiv.org/abs/2005.11314
Autor:
Smith, Philip Boyle, Tong, David
We study boundary states for Dirac fermions in d=1+1 dimensions that preserve Abelian chiral symmetries, meaning that the left- and right-moving fermions carry different charges. We derive simple expressions, in terms of the fermion charge assignment
Externí odkaz:
http://arxiv.org/abs/1912.01602
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