HEP Lattice·hep-lat

Thu·Jun 18, 2026Thursday·June 18, 2026

6 papers—2 primary·4 cross-listed

01
Hybrid renormalization in lattice calculation of baryon LCDAs
Mu-Hua Zhang🇨🇳
At the 2025 International Conference on the Structure of Baryons (Baryons 2025), I presented our recent progress in lattice calculations of baryon light-cone distribution amplitudes (LCDAs). In Ref.[1], we implemented a novel hybrid renormalization scheme for octet baryons, leading to reliable determinations of quasi-distribution amplitudes (quasi-DAs). The calculations were performed on $N_{f} = 2 + 1$ ensembles with stout-smeared clover fermions and a Symanzik-improved gauge action at three lattice spacings, $a = 0.052, 0.077, 0.105$ fm. The hybrid renormalization removes linear divergences in lattice matrix elements and yields smooth, self-consistent quasi-DAs, providing a solid foundation for LaMET-based extractions of baryon LCDAs. Results at the continuum limit and physical pion mass will be reported in the near future.
hep-latJ.Subatomic Part.Cosmol.(2026)·1 citation
02
The Collins-Soper kernel from a vacuum soft function
Anthony Francis🇹🇼 · C.-J. David Lin🇹🇼 · Wayne Morris🇹🇼 · Yong Zhao🇺🇸
The Collins-Soper kernel is calculated from a vacuum soft function using space-like Wilson lines with complex-directional vectors on the Euclidean lattice. Our pure gauge calculations with this method achieve high statistical precision in computing the soft function, whose rapidity dependence is well described by Collins-Soper evolution across a wide range of rapidity differences. The extracted kernel contains errors comparable to those achieved in state-of-the-art lattice calculations based on hadronic observables, but exhibits saturated behavior at large transverse Wilson-line separations.
hep-lathep-phhep-th2 citations
03
Ground state preparation of random all-to-all Hamiltonians using ADAPT-VQE
Sabhyata Gupta🇩🇪 · Bharath Sambasivam🇺🇸 · Sophia E. Economou🇺🇸 · Edwin Barnes🇺🇸 · Alexander F. Kemper🇺🇸 · Raghav G. Jha🇺🇸
The ground state of random Hamiltonians with all-to-all interactions such as the quantum Sherrington-Kirkpatrick (SK) model and the Sachdev-Ye-Kitaev (SYK) model follow volume-law entanglement and are expected to be hard to model using tensor networks. In recent years, some progress has been made to push the limit of classical methods using neural quantum states. However, it remains an open question whether there exist quantum algorithms that could offer a quantum advantage over the state-of-the-art classical methods in simulating random Hamiltonians. In this work, we show that one such algorithm, TETRIS-ADAPT-VQE, can construct accurate ground states for dense and sparse SYK models containing up to $N = 20$ Majorana fermions achieving fidelities $\geq 99.3%$ and for the quantum SK model with up to $L = 18$ sites achieving fidelities $\geq 99.9998%$ . We find that while the preparation of ground states is efficient (in terms of operator pool size and circuit depth) for the SK model, it is not efficient for either dense or moderately sparse SYK models.
↳ quant-phcond-mat.dis-nnhep-lathep-th0 citations
04
An effective field theory approach to the sign problem in BFSS
Gauri Batra🇺🇸 · Henry W. Lin🇺🇸 · Haifeng Tang🇺🇸
The sign problem is a notorious obstacle for classically simulating quantum theories with fermions. We propose an effective field theory method for analyzing the sign problem. At high temperatures, a $d$ +1 dimensional field theory reduces to a bosonic $d$ -dimensional theory; the phase of the Pfaffian in the higher dimensional theory is encoded in an operator in the lower dimensional theory. We apply this framework to the D0-brane/BFSS matrix quantum mechanics, where the phase becomes an operator in a bosonic multi-matrix integral. Our results show that the continuum theory has a sign problem that persists in the large- $N$ 't Hooft regime. However, detecting the sign problem involves going to 10-loop order in the high-temperature expansion. This delayed onset follows from the fact that the Pfaffian phase transforms as an $O (9)$ pseudoscalar. Furthermore, the relevant diagrams give a numerically small prefactor. Consequently, ignoring the sign problem leads to a relatively small fractional error in thermodynamic quantities for temperatures $T ≳ λ^{1/3}$ . However, at stronger coupling in the 't Hooft regime, the sign problem may become more severe. Finally, we initiate the application of this framework to higher-dimensional maximally supersymmetric Yang-Mills theories.
↳ hep-thhep-latquant-ph2 citations
05
Mutation and crossover of simplicial complexes
Boyu Li🇯🇵 · Kohta Hatakeyama🇯🇵 · Matsuo Sato🇯🇵 · Yuji Sugimoto🇯🇵 · Gota Tanaka🇯🇵
Color graphs and their subgraphs, referred to as bubble graphs, correspond bijectively to the simplicial complexes of pseudomanifolds and their subsimplices, respectively. In this paper, we introduce matrix representations for colored graphs and their associated bubble graphs. By using this correspondence, we define simplicial-complex matrices and subsimplex matrices that encode the simplicial complexes of pseudomanifolds and their subsimplices. Moreover, we formulate mutation and crossover operations on colored graphs. Through the established correspondence among simplicial complexes, colored graphs, and simplicial-complex matrices, we extend these operations to simplicial complexes and simplicial-complex matrices. We further implement an algorithm generating simplicial-complex matrices and a genetic algorithm performing mutation and crossover of them to produce pseudomanifolds exhibiting diverse topologies. In addition, we implement procedures for decomposing the generated simplicial-complex matrices into simplex matrices, reconstructing the simplicial complexes of the associated pseudomanifolds from this information, and computing geometric quantities such as the volume, circumcenter, and dual-simplex volume of each simplex.
↳ hep-thgr-qchep-latmath-ph+10 citations
06
Three-body unitary determination of the $f_{1} (1285)$ and $f_{1} (1420)$ pole positions
Tao-Ran Hu🇨🇳 · Hai-Long Fu🇨🇳 · Feng-Kun Guo🇨🇳 · Ulf-G. Meißner🇩🇪 · Xu Zhang🇨🇳
We study the $I^{G} (J^{P C}) = 0^{+} (1^{++})$ $K K ˉ π$ system in an infinite-volume three-body unitary framework, focusing on the pole content of the region of the $f_{1} (1285)$ and $f_{1} (1420)$ resonances. The coupled $π a_{0}$ - $K K ˉ^{*}$ amplitude is constructed in the spectator-isobar representation, where the one-particle-exchange interaction required by three-body unitarity automatically incorporates the triangle-singularity mechanism. The short-range three-body interaction is constrained by fitting the $0^{+} (1^{++})$ component of the BESIII $K_{S}^{0} K_{S}^{0} π^{0}$ invariant-mass distribution in the $J / ψ \to γ (K_{S}^{0} K_{S}^{0} π^{0})$ decay. Analytically continuing the fitted amplitude to the relevant unphysical Riemann sheets, we find two robust poles: \begin{align} \sqrt{s_{f_1(1285)}}&= \left(1277\pm2\pm1\right) -i\left(12\pm1\pm0\right)\text{MeV}\,,\notag\\ \sqrt{s_{f_1(1420)}}&= \left(1435\pm2\pm7\right) -i\left(40\pm2\pm1\right)\text{MeV}\,.\notag \end{align} The pole trajectories indicate that the $f_{1} (1285)$ originates from dressing a bare state introduced in the potential. In contrast, the $f_{1} (1420)$ is predominantly dynamically generated, and a single-channel analysis traces it to an $S$ -wave $K K ˉ^{*}$ quasi-bound state mixed with the nearby bare state, supporting its hadronic-molecule interpretation. We also find an additional pole deeper in the complex plane in the best-fit amplitude on the same Riemann sheet as the $f_{1} (1285)$ . This additional pole is generated by the $P$ -wave $π a_{0}$ contact interaction alone. It has a sizable cutoff and two-body-input dependence, and leaves little visible imprint on the physical lineshape. Finally, we provide a detailed and pedagogical appendix on how three-body cuts affect the solution of the integral equation.
↳ hep-phhep-exhep-latnucl-th0 citations

Affiliations

first authorsco-authorsvia INSPIRE

Hybrid renormalization in lattice calculation of baryon LCDAs

The Collins-Soper kernel from a vacuum soft function

Ground state preparation of random all-to-all Hamiltonians using ADAPT-VQE

An effective field theory approach to the sign problem in BFSS

Mutation and crossover of simplicial complexes

Three-body unitary determination of the f1​(1285) and f1​(1420) pole positions

Affiliations

Three-body unitary determination of the $f_{1} (1285)$ and $f_{1} (1420)$ pole positions