Numerical determination of monopole scaling dimension in parity-invariant three-dimensional noncompact QED
We present a direct Monte Carlo determination of the scaling dimension of a topological defect operator in the infrared fixed point of a three-dimensional interacting quantum field theory. For this, we compute the free energy to introduce the background gauge field of the $$Q$$ = 1 monopole-antimonopole pair in threedimensional noncompact QED with $$N$$ = 2, 4 and 12 flavors of massless two-component fermions, and study its asymptotic logarithmic dependence on the monopole-antimonopole separation. We estimate the scaling dimension in the $$N$$ = 12 case to be consistent with the large-$$N$$ (free fermion) value. We find the deviations from this large-$$N$$ value for $$N$$ = 2 and 4 are positive but small, implying that the higher-order corrections in the large-$$N$$ expansion become mildly important for $$N$$ = 2, 4.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1566894
- Alternate ID(s):
- OSTI ID: 1570680
- Report Number(s):
- BNL-212180-2019-JAAM; PRVDAQ; 054514
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Vol. 100 Journal Issue: 5; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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