Analytic and numerical bootstrap of CFTs with $O(m)\times O(n)$ global symmetry in 3D
Analytic and numerical bootstrap of CFTs with $O(m)\times O(n)$ global symmetry in 3D
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具有 $O(m) imes O(n)$ 3D 全局对称性的 CFT 的解析和数值引导
DOI:
10.21468/scipostphys.9.3.035
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发表时间:
2020
期刊:
影响因子:
5.5
通讯作者:
A. Stergiou
中科院分区:
文献类型:
--
作者:
J. Henriksson;Stefanos R. Kousvos;A. Stergiou
<jats:p>Motivated by applications to critical phenomena and open theoretical
questions, we study conformal field theories with
<jats:inline-formula><jats:alternatives><jats:tex-math>O(m)\times
O(n)</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>O</mml:mi><mml:mo stretchy="false" form="prefix">(</mml:mo><mml:mi>m</mml:mi><mml:mo stretchy="false" form="postfix">)</mml:mo><mml:mo>×</mml:mo><mml:mi>O</mml:mi><mml:mo stretchy="false" form="prefix">(</mml:mo><mml:mi>n</mml:mi><mml:mo stretchy="false" form="postfix">)</mml:mo></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>
global symmetry in <jats:inline-formula><jats:alternatives><jats:tex-math>d=3</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>d</mml:mi><mml:mo>=</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>
spacetime dimensions. We use both analytic and numerical bootstrap
techniques. Using the analytic bootstrap, we calculate anomalous
dimensions and OPE coefficients as power series in
<jats:inline-formula><jats:alternatives><jats:tex-math>\varepsilon=4-d</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>ε</mml:mi><mml:mo>=</mml:mo><mml:mn>4</mml:mn><mml:mo>−</mml:mo><mml:mi>d</mml:mi></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>
and in <jats:inline-formula><jats:alternatives><jats:tex-math>1/n</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mi>/</mml:mi><mml:mi>n</mml:mi></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>,
with a method that generalizes to arbitrary global symmetry. Whenever
comparison is possible, our results agree with earlier results obtained
with diagrammatic methods in the literature. Using the numerical
bootstrap, we obtain a wide variety of operator dimension bounds, and we
find several islands (isolated allowed regions) in parameter space for
<jats:inline-formula><jats:alternatives><jats:tex-math>O(2)\times O(n)</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>O</mml:mi><mml:mo stretchy="false" form="prefix">(</mml:mo><mml:mn>2</mml:mn><mml:mo stretchy="false" form="postfix">)</mml:mo><mml:mo>×</mml:mo><mml:mi>O</mml:mi><mml:mo stretchy="false" form="prefix">(</mml:mo><mml:mi>n</mml:mi><mml:mo stretchy="false" form="postfix">)</mml:mo></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>
theories for various values of <jats:inline-formula><jats:alternatives><jats:tex-math>n</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math></jats:alternatives></jats:inline-formula>.
Some of these islands can be attributed to fixed points predicted by
perturbative methods like the <jats:inline-formula><jats:alternatives><jats:tex-math>\varepsilon</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ε</mml:mi></mml:math></jats:alternatives></jats:inline-formula>
and large-<jats:inline-formula><jats:alternatives><jats:tex-math>n</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math></jats:alternatives></jats:inline-formula>
expansions, while others appear to arise due to fixed points that have
been claimed to exist in resummations of perturbative beta
functions.</jats:p>