Critical coupling in (1+1)-dimensional light-front φ4 theory

Kazuto Oshima, Masanobu Yahiro

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1 Citation (Scopus)


Spontaneous symmetry breaking in (1+1)-dimensional φ4 theory is studied with discretized light-front quantization. The critical coupling evaluated from the first few terms in the ℏ expansion of the commutation relations [a0, an] is 28.8μ2/ℏ ≤ λcr ≤ 31.1μ2/ℏ, consistent with the equal-time value, 22μ2/ℏ ≤ λcr ≤ 55.5μ2/ℏ.

Original languageEnglish
Pages (from-to)459-465
Number of pages7
JournalProgress of Theoretical Physics
Issue number2
Publication statusPublished - Feb 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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