Symmetric mass generation as a multicritical point with enhanced symmetry
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914228243267584 |
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| author | Maiti, Sandip Banerjee, Debasish Chandrasekharan, Shailesh Marinkovic, Marina K. |
| author_facet | Maiti, Sandip Banerjee, Debasish Chandrasekharan, Shailesh Marinkovic, Marina K. |
| contents | We explore the phase diagram of a lattice fermion model that exhibits three distinct phases: a massless fermion (MF) phase; a massive fermion phase with spontaneous symmetry breaking (SSB) induced by a fermion bilinear condensate; and a massive fermion phase with symmetric mass generation (SMG). Using the fermion-bag Monte Carlo method on large cubical lattices, we find evidence for traditional second-order critical points separating the first two and the latter two phases. Remarkably, these critical points appear to merge at a multicritical point with enhanced symmetry when the symmetry breaking parameter is tuned to zero, giving rise to the recently discovered direct second-order transition between the massless and symmetric massive fermion phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24836 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Symmetric mass generation as a multicritical point with enhanced symmetry Maiti, Sandip Banerjee, Debasish Chandrasekharan, Shailesh Marinkovic, Marina K. High Energy Physics - Lattice Strongly Correlated Electrons High Energy Physics - Theory We explore the phase diagram of a lattice fermion model that exhibits three distinct phases: a massless fermion (MF) phase; a massive fermion phase with spontaneous symmetry breaking (SSB) induced by a fermion bilinear condensate; and a massive fermion phase with symmetric mass generation (SMG). Using the fermion-bag Monte Carlo method on large cubical lattices, we find evidence for traditional second-order critical points separating the first two and the latter two phases. Remarkably, these critical points appear to merge at a multicritical point with enhanced symmetry when the symmetry breaking parameter is tuned to zero, giving rise to the recently discovered direct second-order transition between the massless and symmetric massive fermion phases. |
| title | Symmetric mass generation as a multicritical point with enhanced symmetry |
| topic | High Energy Physics - Lattice Strongly Correlated Electrons High Energy Physics - Theory |
| url | https://arxiv.org/abs/2512.24836 |