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SUMMARY:Shu-Heng Shao (MIT)
DTSTART:20260324T183000Z
DTEND:20260324T193000Z
DTSTAMP:20260423T005739Z
UID:nhetc/132
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/nhetc/132/">
 Lattice chiral symmetry from bosons in 3+1d</a>\nby Shu-Heng Shao (MIT) as
  part of NHETC Seminar\n\n\nAbstract\nWe present an explicit  Hamiltonian
  that realizes an exact lattice chiral $U(1)_V \\times U(1)_A$ recently pr
 oposed. Nielsen-Ninomiya-type no-go theorems are evaded by using lattice b
 osons rather than fermions. The continuum limit is a compact boson field t
 heory with an axion-like coupling. While $U(1)_V$ shifts the lattice scala
 r\, $U(1)_A$ acts on short axion string excitations. We demonstrate the ch
 iral anomaly by showing that $U(1)_A$ is broken when $U(1)_V$ is gauged. F
 inally\, gauging either $U(1)_V$ and $U(1)_A$ leads to lattice non-inverti
 ble and 2-group symmetries\, respectively.\n
LOCATION:https://researchseminars.org/talk/nhetc/132/
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