Zobrazeno 1 - 10
of 242
pro vyhledávání: '"Nathan Seiberg"'
Publikováno v:
SciPost Physics, Vol 16, Iss 6, p 154 (2024)
We discuss the exact non-invertible Kramers-Wannier symmetry of 1+1d lattice models on a tensor product Hilbert space of qubits. This symmetry is associated with a topological defect and a conserved operator, and the latter can be presented as a matr
Externí odkaz:
https://doaj.org/article/f825f0e693444f5f88b6dd0b460425f7
Publikováno v:
SciPost Physics, Vol 16, Iss 3, p 064 (2024)
We study the symmetries of closed Majorana chains in 1+1d, including the translation, fermion parity, spatial parity, and time-reversal symmetries. The algebra of the symmetry operators is realized projectively on the Hilbert space, signaling anomali
Externí odkaz:
https://doaj.org/article/d5031f9273264220a012a2e5129a0e7e
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 1, Pp 1-28 (2018)
Abstract We study SU(N ) Quantum Chromodynamics (QCD) in 3+1 dimensions with N f degenerate fundamental quarks with mass m and a θ-parameter. For generic m and θ the theory has a single gapped vacuum. However, as θ is varied through θ = π for la
Externí odkaz:
https://doaj.org/article/a929166109fe469ebfeed7871a5cec6b
Autor:
Zohar Komargodski, Nathan Seiberg
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 1, Pp 1-24 (2018)
Abstract We consider the dynamics of 2+1 dimensional SU(N) gauge theory with Chern-Simons level k and N f fundamental fermions. By requiring consistency with previously suggested dualities for N f ≤ 2k as well as the dynamics at k = 0 we propose th
Externí odkaz:
https://doaj.org/article/f57d6cc2753d423995d5757bd7de90cb
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 5, Pp 1-50 (2017)
Abstract SU(N ) gauge theory is time reversal invariant at θ = 0 and θ = π. We show that at θ = π there is a discrete ’t Hooft anomaly involving time reversal and the center symmetry. This anomaly leads to constraints on the vacua of the theor
Externí odkaz:
https://doaj.org/article/b977b65427234a5cb5f41e46129b97c1
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 4, Pp 1-39 (2017)
Abstract We analyze in detail the global symmetries of various (2 + 1)d quantum field theories and couple them to classical background gauge fields. A proper identification of the global symmetries allows us to consider all non-trivial bundles of tho
Externí odkaz:
https://doaj.org/article/1b53beb1d2f54056aa9cd2fe8853ecfa
Publikováno v:
SciPost Physics, Vol 10, Iss 2, p 027 (2021)
We discuss nonstandard continuum quantum field theories in 2+1 dimensions. They exhibit exotic global symmetries, a subtle spectrum of charged excitations, and dualities similar to dualities of systems in 1+1 dimensions. These continuum models rep
Externí odkaz:
https://doaj.org/article/d45e6d68549149c9bbc563d137b20eca
Publikováno v:
SciPost Physics, Vol 10, Iss 1, p 003 (2021)
Following our earlier analyses of nonstandard continuum quantum field theories, we study here gapped systems in 3+1 dimensions, which exhibit fractonic behavior. In particular, we present three dual field theory descriptions of the low-energy phys
Externí odkaz:
https://doaj.org/article/7e2b0478bfae46d3a7bb76654954e46d
Publikováno v:
SciPost Physics, Vol 9, Iss 4, p 046 (2020)
We extend our exploration of nonstandard continuum quantum field theories in 2+1 dimensions to 3+1 dimensions. These theories exhibit exotic global symmetries, a peculiar spectrum of charged states, unusual gauge symmetries, and surprising dualiti
Externí odkaz:
https://doaj.org/article/39c79a8ca19b40c88b90ff42c77a01d2
Autor:
Nathan Seiberg
Publikováno v:
SciPost Physics, Vol 8, Iss 4, p 050 (2020)
Motivated by recent discussions of fractons, we explore nonrelativistic field theories with a continuous global symmetry, whose charge is a spatial vector. We present several such symmetries and demonstrate them in concrete examples. They differ b
Externí odkaz:
https://doaj.org/article/31cb0b30ef434c17a7372c8f247cd561