arXiv - PHYS - High Energy Physics - Lattice最新文献_第8页

Generating configurations of increasing lattice size with machine learning and the inverse renormalization group 利用机器学习和逆重正化群生成晶格尺寸不断增大的构型

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-25 DOI: arxiv-2405.16288

Dimitrios Bachtis

引用次数: 0

Uncovering gauge-dependent critical order-parameter correlations by a stochastic gauge fixing at O($N$)$^*$ and Ising$^*$ continuous transitions 在O($N$)$^*$和伊辛$^*$连续跃迁中通过随机规固定揭示规依赖的临界阶参数相关性

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-22 DOI: arxiv-2405.13485

Claudio Bonati, Andrea Pelissetto, Ettore Vicari

{"title":"Uncovering gauge-dependent critical order-parameter correlations by a stochastic gauge fixing at O($N$)$^*$ and Ising$^*$ continuous transitions","authors":"Claudio Bonati, Andrea Pelissetto, Ettore Vicari","doi":"arxiv-2405.13485","DOIUrl":"https://doi.org/arxiv-2405.13485","url":null,"abstract":"We study the O($N$)$^*$ transitions that occur in the 3D $mathbb{Z}_2$-gauge\u0000$N$-vector model, and the analogous Ising$^*$ transitions occurring in the 3D\u0000$mathbb{Z}_2$-gauge Higgs model, corresponding to an $N$-vector model with\u0000$N=1$. At these transitions, gauge-invariant correlations behave as in the\u0000usual $N$-vector/Ising model. Instead, the nongauge invariant spin correlations\u0000are trivial and therefore the spin order parameter that characterizes the\u0000spontaneous breaking of the O($N$) symmetry in standard $N$-vector/Ising\u0000systems is apparently absent. We define a novel gauge fixing procedure -- we\u0000name it stochastic gauge fixing -- that allows us to define a gauge-dependent\u0000vector field that orders at the transition and is therefore the appropriate\u0000order parameter for the O($N$) symmetry breaking. To substantiate this\u0000approach, we perform numerical simulations for $N=3$ and $N=1$. A finite-size\u0000scaling analysis of the numerical data allows us to confirm the general\u0000scenario: the gauge-fixed spin correlation functions behave as the\u0000corresponding functions computed in the usual $N$-vector/Ising model. The\u0000emergence of a critical vector order parameter in the gauge model shows the\u0000complete equivalence of the O($N$)$^*$/Ising$^*$ and O($N$)/Ising universality\u0000classes.","PeriodicalId":501191,"journal":{"name":"arXiv - PHYS - High Energy Physics - Lattice","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141147677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum Many-Body Scarring in a Non-Abelian Lattice Gauge Theory 非阿贝尔晶格规理论中的量子多体伤痕

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-21 DOI: arxiv-2405.13112

Giuseppe Calajò, Giovanni Cataldi, Marco Rigobello, Darvin Wanisch, Pietro Silvi, Simone Montangero, Jad C. Halimeh

引用次数: 0

Digitization and subduction of $SU(N)$ gauge theories SU(N)$规理论的数字化与潜导

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-20 DOI: arxiv-2405.12204

Benoît Assi, Henry Lamm

引用次数: 0

Chiral and deconfinement properties of the QCD crossover have a different volume and baryochemical potential dependence QCD 交叉的手性和去封闭性具有不同的体积和重化学势依赖性

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-20 DOI: arxiv-2405.12320

Szabolcs Borsanyi, Zoltan Fodor, Jana N. Guenther, Ruben Kara, Paolo Parotto, Attila Pasztor, Ludovica Pirelli, Chik Him Wong

{"title":"Chiral and deconfinement properties of the QCD crossover have a different volume and baryochemical potential dependence","authors":"Szabolcs Borsanyi, Zoltan Fodor, Jana N. Guenther, Ruben Kara, Paolo Parotto, Attila Pasztor, Ludovica Pirelli, Chik Him Wong","doi":"arxiv-2405.12320","DOIUrl":"https://doi.org/arxiv-2405.12320","url":null,"abstract":"The crossover from hadronic to quark matter is understood to be both a\u0000deconfinement as well as a chiral symmetry restoring transition. Here, we study\u0000observables related to both aspects using lattice simulations: the Polyakov\u0000loop and its derivatives and the chiral condensate and its derivatives. At zero\u0000baryochemical potential, and infinite volume, the chiral and deconfinement\u0000crossover temperatures almost agree. However, chiral and deconfinement related\u0000observables have a qualitatively different chemical potential and volume\u0000dependence. In general, deconfinement related observables have a milder volume\u0000dependence. Furthermore, while the deconfinement transition appears to get\u0000broader with increasing $mu_B$, the width as well as the strength of the\u0000chiral transition is approximately constant. Our results are based on\u0000simulations at zero and imaginary chemical potentials using 4stout-improved\u0000staggered fermions with $N_tau=12$ time-slices and physical quark masses.","PeriodicalId":501191,"journal":{"name":"arXiv - PHYS - High Energy Physics - Lattice","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141147723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Searching for the QCD critical endpoint using multi-point Padé approximations 利用多点帕代近似寻找 QCD 临界端点

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-16 DOI: arxiv-2405.10196

David A. Clarke, Petros Dimopoulos, Francesco Di Renzo, Jishnu Goswami, Christian Schmidt, Simran Singh, Kevin Zambello

引用次数: 0

From the Quantum Breakdown Model to the Lattice Gauge Theory 从量子分解模型到晶格规理论

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-14 DOI: arxiv-2405.08273

Yu-Min Hu, Biao Lian

引用次数: 0

Updates on inclusive charmed and bottomed meson decays from the lattice 来自晶格的包容性粲介子和底介子衰变的最新情况

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-10 DOI: arxiv-2405.06152

Ryan Kellermann, Alessandro Barone, Shoji Hashimoto, Andreas Jüttner, Takashi Kaneko

引用次数: 0

SO(5) multicriticality in two-dimensional quantum magnets 二维量子磁体中的 SO(5) 多重临界性

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-10 DOI: arxiv-2405.06607

Jun Takahashi, Hui Shao, Bowen Zhao, Wenan Guo, Anders W. Sandvik

{"title":"SO(5) multicriticality in two-dimensional quantum magnets","authors":"Jun Takahashi, Hui Shao, Bowen Zhao, Wenan Guo, Anders W. Sandvik","doi":"arxiv-2405.06607","DOIUrl":"https://doi.org/arxiv-2405.06607","url":null,"abstract":"We resolve the nature of the quantum phase transition between a N'eel\u0000antiferromagnet and a valence-bond solid in two-dimensional spin-1/2 magnets.\u0000We study a class of $J$-$Q$ models, in which Heisenberg exchange $J$ competes\u0000with interactions $Q_n$ formed by products of $n$ singlet projectors on\u0000adjacent parallel lattice links. QMC simulations provide unambiguous evidence\u0000for first-order transitions, with the discontinuities increasing with $n$. For\u0000$n=2$ and $n=3$ models, the first-order signatures are very weak. On\u0000intermediate length scales, we extract well-defined scaling dimensions\u0000(critical exponents) that are common to the models with small $n$, indicating\u0000proximity to a quantum critical point. By combining two $Q$ terms, the\u0000transition can be tuned from weak to more strongly first-order. The two\u0000coexisting orders on the first-order line scale with a large exponent $beta\u0000approx 0.85$. This exponent and others are close to bounds for an SO($5$)\u0000symmetric CFT with a relevant SO($5$) singlet. We characterize the emergent\u0000SO($5$) symmetry by the scaling dimensions of its leading irrelevant\u0000perturbations. The large $beta$ value and a large correlation length exponent,\u0000$nu approx 1.4$, partially explain why the transition remains near-critical\u0000even quite far away from the critical point and in many different models\u0000without fine-tuning. In addition, we find that few-spin lattice operators are\u0000dominated by the SO($5$) violating field (the traceless symmetric tensor), and\u0000interactions involving many spins are required to observe strong effects of the\u0000relevant SO($5$) singlet. The exponent that had previously been identified with\u0000the divergent correlation length when crossing between the two phases does not\u0000have a corresponding CFT operator. We explain this emergent pseudocritical\u0000scale by a mechanism relying on a dangerously irrelevant SO($5$) perturbation.","PeriodicalId":501191,"journal":{"name":"arXiv - PHYS - High Energy Physics - Lattice","volume":"121 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical Conductivity in Symmetric Mass Generation Insulators 对称质量生成绝缘体中的光导率

arXiv - PHYS - High Energy Physics - Lattice Pub Date : 2024-05-08 DOI: arxiv-2405.05339

Meng Zeng, Fu Xu, Da-Chuan Lu, Yi-Zhuang You

{"title":"Optical Conductivity in Symmetric Mass Generation Insulators","authors":"Meng Zeng, Fu Xu, Da-Chuan Lu, Yi-Zhuang You","doi":"arxiv-2405.05339","DOIUrl":"https://doi.org/arxiv-2405.05339","url":null,"abstract":"Symmetric mass generation (SMG) insulators are interaction-driven,\u0000featureless Mott insulating states in quantum many-body fermionic systems.\u0000Recent advancements suggest that zeros in the fermion Green's function could\u0000lead to non-vanishing negative optical conductivity in SMG insulators, even\u0000below the charge excitation gap. This study explores the origin of this unusual\u0000behavior through the lens of pole-zero duality, highlighting a critical issue\u0000where the current operator becomes unbounded, rendering the response function\u0000unphysical. By employing a lattice model, we derive a well-behaved lattice\u0000regularization of the current operator, enabling a detailed study of optical\u0000conductivity in SMG insulators. Utilizing both analytical and numerical\u0000methods, including strong-coupling expansions, we confirm that SMG insulators\u0000exhibit no optical conductivity at low energies below the charge gap,\u0000effectively resolving the paradox. This work not only deepens our understanding\u0000of quantum many-body phenomena but also lays a robust theoretical groundwork\u0000for future experimental explorations of SMG materials.","PeriodicalId":501191,"journal":{"name":"arXiv - PHYS - High Energy Physics - Lattice","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0