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Updated: Jun 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Mutual information and boson radius in a c=1 critical system in one dimension
Shunsuke Furukawa1, Vincent Pasquier, Jun'ichi Shiraishi
1Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan.
Abstract:
We study the generic scaling properties of the mutual information between two disjoint intervals, in a class of one-dimensional quantum critical systems described by the c=1 bosonic field theory. A numerical analysis of a spin-chain model reveals that the mutual information is scale invariant and depends directly on the boson radius. We interpret the results in terms of correlation functions of branch-point twist fields. The present study provides a new way to determine the boson radius, and furthermore demonstrates the power of the mutual information to extract more refined information of conformal field theory than the central charge.
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