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• W1980936068 abstract "We show that correlators of local operators in four-dimensional free scalar field theory can be expressed in terms of amplitudes in a two-dimensional topological field theory (TFT2). We describe the state space of the TFT2, which has SO(4,2) as a global symmetry, and includes both positive and negative energy representations. Invariant amplitudes in the TFT2 correspond to surfaces interpolating from multiple circles to the vacuum. They are constructed from SO(4,2) invariant linear maps from the tensor product of the state spaces to complex numbers. When appropriate states labeled by 4D-spacetime coordinates are inserted at the circles, the TFT2 amplitudes become correlators of the four-dimensional CFT4. The TFT2 structure includes an associative algebra, related to crossing in the 4D-CFT, with a non-degenerate pairing related to the CFT inner product in the CFT4. In the free-field case, the TFT2/CFT4 correspondence can largely be understood as realization of free quantum field theory as a categorified form of classical invariant theory for appropriate SO(4,2) representations. We discuss the prospects of going beyond free fields in this framework." @default.
• W1980936068 created "2016-06-24" @default.
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• W1980936068 date "2015-01-01" @default.
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• W1980936068 title "CFT 4 as<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si1.gif overflow=scroll><mml:mrow><mml:mi mathvariant=italic>SO</mml:mi></mml:mrow><mml:mo stretchy=false>(</mml:mo><mml:mn>4</mml:mn><mml:mo>,</mml:mo><mml:mn>2</mml:mn><mml:mo stretchy=false>)</mml:mo></mml:math>-invariant TFT 2" @default.
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• W1980936068 doi "https://doi.org/10.1016/j.nuclphysb.2014.11.013" @default.
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