Summary
We study the spontaneous break-down of symmetry in the exactly solvable Euclidean static ultra-local model. We show that there exists always a suitable interval for the arbitrary constants from which the Green’s functions depend, and in correspondence a suitable valueλ cof the coupling constant, such that forλ<λ cthe theory admits the symmetric solution, while forλ⩾λ cthe theory predicts also the possibility of the spontaneous break-down of the discrete symmetry.
Riassunto
Si studia il fenomeno della rottura spontanea di simmetria nel modello, esattamente risolubile, euclideo statico ultralocale. Si mostra che esiste sempre un opportuno intervallo per le costanti arbitrarie da cui dipendono le funzioni di Green, e in corrispondenza un opportuno valoreλ cdelle costanti di accoppiamento, tale che perλ<λ cla teoria ammette la soluzione simmetrica, mentre perλ⩾λ cla teoria predice anche la possibilità del fenomeno della rottura spontanea della simmetria discreta.
Реэюме
Мы исследуем спонтанное нарущение симметрии в точно рещаемой звклидовой статической ультралокальной модели. Мы покаэываем, что всегда сушествует соответствуюший интервал для проиэвольных постоянных, от которых эависят функции Грина, и сушествует соответствуюшее эначение константы свяэиλ c, такое, что дляλ<λ cтеория допускает симметричное рещение, тогда как дляλ⩾λ cтеоря предскаэывает воэможность спонтанного нарущения дискретной симметрии.
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References
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Scarpetta, G., Vilasi, G. Spontaneous break-down of symmetry in the static ultra-local approximation of thegϕ 4 quantum field theory. Nuov Cim A 28, 62–74 (1975). https://doi.org/10.1007/BF02730397
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DOI: https://doi.org/10.1007/BF02730397