Thu·Oct 13, 2022Thursday·October 13, 2022

1. 01*

   Nucleon transverse quark spin densities

   Constantia Alexandrou🇨🇾 · Simone Bacchio🇨🇾 · Martha Constantinou🇺🇸 · Petros Dimopoulos🇮🇹 · Jacob Finkenrath🇨🇾 · Roberto Frezzotti🇮🇹 · Kyriakos Hadjiyiannakou🇨🇾 · Karl Jansen🇩🇪 · Bartosz Kostrzewa🇩🇪 · Giannis Koutsou🇨🇾 · Gregoris Spanoudes🇨🇾 · Carsten Urbach🇩🇪

   We present a calculation of the Mellin moments of the nucleon transverse quark spin densities extracted from the unpolarized and transversity generalized form factors. We use three $N_F=2+1+1$ ensembles of twisted mass fermions with quark masses tuned to their physical values and lattice spacings $a\sim 0.08$~fm, $a\sim 0.07$~fm and $a\sim 0.06$~fm and extrapolate the form factors to the continuum limit. Besides isovector densities we also include results for the tensor charge for each quark flavor using the ensemble with $a\sim 0.08$~fm for which we include the disconnected contributions.

   hep-lathep-phnucl-thPoS(2023)·2 citations
2. 02*

   Vacuum Decay and Euclidean Lattice Monte Carlo

   Jiayu Shen🇺🇸 · Patrick Draper🇺🇸 · Aida X. El-Khadra🇺🇸

   The decay rate of a metastable vacuum is usually calculated using a semiclassical approximation to the Euclidean path integral. The extension to a complete Euclidean lattice Monte Carlo computation, however, is hampered by analytic continuations that are ill-suited to numerical treatment, and the nonequilibrium nature of a metastable state. In this paper we develop a new methodology to compute vacuum decay rates from Monte Carlo simulations of Euclidean lattice theories. To test the new method, we consider simple quantum mechanical systems systems with metastable vacua. This work can be extended to Euclidean field theories, which we discuss in the Conclusions.

   hep-lathep-phhep-thPRD(2023)·5 citations
3. 03*

   The Future of High Energy Physics Software and Computing

   V. Daniel Elvira · Steven Gottlieb🇺🇸 · Oliver Gutsche · Benjamin Nachman (frontier conveners) · S. Bailey🇺🇸 · W. Bhimji🇺🇸 · P. Boyle · G. Cerati🇺🇸 · M. Carrasco Kind🇺🇸 · K. Cranmer🇺🇸 · G. Davies🇬🇧 · V. D. Elvira and 16 other authors

   Software and Computing (S&C) are essential to all High Energy Physics (HEP) experiments and many theoretical studies. The size and complexity of S&C are now commensurate with that of experimental instruments, playing a critical role in experimental design, data acquisition/instrumental control, reconstruction, and analysis. Furthermore, S&C often plays a leading role in driving the precision of theoretical calculations and simulations. Within this central role in HEP, S&C has been immensely successful over the last decade. This report looks forward to the next decade and beyond, in the context of the 2021 Particle Physics Community Planning Exercise ("Snowmass") organized by the Division of Particles and Fields (DPF) of the American Physical Society.

   ↳ hep-exhep-lathep-phhep-th11 citations
4. 04*

   Suppression of $1/f$ noise in quantum simulators of gauge theories

   Bhavik Kumar🇮🇳 · Philipp Hauke🇮🇹 · Jad C. Halimeh🇩🇪

   In the current drive to quantum-simulate evermore complex gauge-theory phenomena, it is necessary to devise schemes allowing for the control and suppression of unavoidable gauge-breaking errors on different experimental platforms. Although there have been several successful approaches to tackle coherent errors, comparatively little has been done in the way of decoherence. By numerically solving the corresponding Bloch--Redfield equations, we show that the recently developed method of \textit{linear gauge protection} suppresses the growth of gauge violations due to $1/f^{\beta }$ noise as $1/V^{\beta }$, where $V$ is the protection strength and $\beta >0$, in Abelian lattice gauge theories, as we show through exemplary results for $\mathrm{U}(1)$ quantum link models and ${\mathbb{Z}}_2$ lattice gauge theories. We support our numerical findings with analytic derivations through time-dependent perturbation theory. Our findings are of immediate applicability in modern analog quantum simulators and digital NISQ devices.

   ↳ quant-phcond-mat.quant-gascond-mat.str-elhep-lat2 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.