Emergent criticality in a constrained boson model
We show, via explicit computation on a constrained bosonic model, that the presence of subsystem symmetries can lead to a quantum phase transition (QPT) where the critical point exhibits an emergent enhanced symmetry. Such a transition separates a unique gapped ground state from a gapless one; the l...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SciPost
2025-08-01
|
| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.19.2.055 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849224199066877952 |
|---|---|
| author | Anirudha Menon, Anwesha Chattopadhyay, Krishnendu Sengupta, Arnab Sen |
| author_facet | Anirudha Menon, Anwesha Chattopadhyay, Krishnendu Sengupta, Arnab Sen |
| author_sort | Anirudha Menon, Anwesha Chattopadhyay, Krishnendu Sengupta, Arnab Sen |
| collection | DOAJ |
| description | We show, via explicit computation on a constrained bosonic model, that the presence of subsystem symmetries can lead to a quantum phase transition (QPT) where the critical point exhibits an emergent enhanced symmetry. Such a transition separates a unique gapped ground state from a gapless one; the latter phase exhibits a broken $Z_2$ symmetry which we tie to the presence of the subsystem symmetries in the model. The intermediate critical point separating these phases exhibits an additional emergent $Z_2$ symmetry which we identify. This emergence leads to a critical theory which seems to be different from those in the Ising universality class. Instead, within the data obtained from finite-size scaling analysis, we find the critical theory to be not inconsistent with Ashkin-Teller universality in the sense that the transitions of the model reproduces a critical line with variable correlation length exponent $\nu$ but constant central charge $c$ close to unity. We verify this scenario via explicit exact-diagonalization computations, provide an effective Landau-Ginzburg theory for such a transition, and discuss the connection of our model to the PXP model describing Rydberg atom arrays. |
| format | Article |
| id | doaj-art-26497e0dcc3c4fd093d3f4ab2aad6b68 |
| institution | Kabale University |
| issn | 2542-4653 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj-art-26497e0dcc3c4fd093d3f4ab2aad6b682025-08-25T13:04:08ZengSciPostSciPost Physics2542-46532025-08-0119205510.21468/SciPostPhys.19.2.055Emergent criticality in a constrained boson modelAnirudha Menon, Anwesha Chattopadhyay, Krishnendu Sengupta, Arnab SenWe show, via explicit computation on a constrained bosonic model, that the presence of subsystem symmetries can lead to a quantum phase transition (QPT) where the critical point exhibits an emergent enhanced symmetry. Such a transition separates a unique gapped ground state from a gapless one; the latter phase exhibits a broken $Z_2$ symmetry which we tie to the presence of the subsystem symmetries in the model. The intermediate critical point separating these phases exhibits an additional emergent $Z_2$ symmetry which we identify. This emergence leads to a critical theory which seems to be different from those in the Ising universality class. Instead, within the data obtained from finite-size scaling analysis, we find the critical theory to be not inconsistent with Ashkin-Teller universality in the sense that the transitions of the model reproduces a critical line with variable correlation length exponent $\nu$ but constant central charge $c$ close to unity. We verify this scenario via explicit exact-diagonalization computations, provide an effective Landau-Ginzburg theory for such a transition, and discuss the connection of our model to the PXP model describing Rydberg atom arrays.https://scipost.org/SciPostPhys.19.2.055 |
| spellingShingle | Anirudha Menon, Anwesha Chattopadhyay, Krishnendu Sengupta, Arnab Sen Emergent criticality in a constrained boson model SciPost Physics |
| title | Emergent criticality in a constrained boson model |
| title_full | Emergent criticality in a constrained boson model |
| title_fullStr | Emergent criticality in a constrained boson model |
| title_full_unstemmed | Emergent criticality in a constrained boson model |
| title_short | Emergent criticality in a constrained boson model |
| title_sort | emergent criticality in a constrained boson model |
| url | https://scipost.org/SciPostPhys.19.2.055 |
| work_keys_str_mv | AT anirudhamenonanweshachattopadhyaykrishnendusenguptaarnabsen emergentcriticalityinaconstrainedbosonmodel |