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Title: $$ \mathcal{N} $$ = 4 superconformal bootstrap of the K3 CFT

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1];  [2];  [3];  [1]
  1. Harvard Univ., Cambridge, MA (United States). Jefferson Physical Lab.
  2. Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics

We study two-dimensional (4; 4) superconformal eld theories of central charge c = 6, corresponding to nonlinear sigma models on K3 surfaces, using the superconformal bootstrap. This is made possible through a surprising relation between the BPS N = 4 superconformal blocks with c = 6 and bosonic Virasoro conformal blocks with c = 28, and an exact result on the moduli dependence of a certain integrated BPS 4-point function. Nontrivial bounds on the non-BPS spectrum in the K3 CFT are obtained as functions of the CFT moduli, that interpolate between the free orbifold points and singular CFT points. We observe directly from the CFT perspective the signature of a continuous spectrum above a gap at the singular moduli, and fi nd numerically an upper bound on this gap that is saturated by the A1 N = 4 cigar CFT. We also derive an analytic upper bound on the fi rst nonzero eigenvalue of the scalar Laplacian on K3 in the large volume regime, that depends on the K3 moduli data. As two byproducts, we find an exact equivalence between a class of BPS N = 2 superconformal blocks and Virasoro conformal blocks in two dimensions, and an upper bound on the four-point functions of operators of sufficiently low scaling dimension in three and four dimensional CFTs.

Research Organization:
Harvard Univ., Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0009988; FG02-91ER40654
OSTI ID:
1389304
Journal Information:
Journal of High Energy Physics (Online), Vol. 2017, Issue 5; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (13)

Inverse bootstrapping conformal field theories journal January 2018
Exact effective interactions and 1/4-BPS dyons in heterotic CHL orbifolds journal January 2019
Bootstrapping the $(A_1,A_2)$ Argyres-Douglas theory text January 2017
Long multiplet bootstrap text January 2017
Bootstrapping the Spectral Function: On the Uniqueness of Liouville and the Universality of BTZ text January 2017
Weight Shifting Operators and Conformal Blocks text January 2017
The 3d Stress-Tensor Bootstrap text January 2017
Spheres, Charges, Instantons, and Bootstrap: A Five-Dimensional Odyssey text January 2017
Bootstrapping the $(A_1,A_2)$ Argyres-Douglas theory text January 2017
Solving M-theory with the Conformal Bootstrap text January 2017
The Conformal Bootstrap: Theory, Numerical Techniques, and Applications text January 2018
Exact effective interactions and 1/4-BPS dyons in heterotic CHL orbifolds text January 2018
Large $c$ Virasoro Blocks from Monodromy Method beyond Known Limits text January 2018

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