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Critical Coupling for Two-dimensional φ⁴ Theory in Discretized Light-Cone Quantization
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Critical Coupling for Two-dimensional φ⁴ Theory in Discretized Light-Cone Quantization
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We solve for the critical coupling in the symmetric phase of two-dimensional $\phi^4$ field theory using Discretized Light-Cone Quantization. We adopt periodic boundary conditions, neglect the zero mode, and obtain a critical coupling consistent with the critical coupling reported using conformal truncation in light-front quantization. We find a 17% dfference from the critical coupling reported with light-front quantization in a symmetric polynomial basis.
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