Date: Wed, 27 Feb 19 01:30:39 GMT Subject: hep-lat daily 2 new + 2 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-lat@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Mon 25 Feb 19 19:00:00 GMT to Tue 26 Feb 19 19:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1902.09542 Date: Mon, 25 Feb 2019 19:00:00 GMT (115kb,D) Title: Conformal dimensions in the large charge sectors at the O(4) Wilson-Fisher fixed point Authors: Debasish Banerjee and Shailesh Chandrasekharan and Domenico Orlando and Susanne Reffert Categories: hep-lat cond-mat.str-el hep-th Comments: 4+4 pages, 6 figures \\ We study the O(4) Wilson-Fisher fixed point in 2+1 dimensions in fixed large-charge sectors identified by products of two spin-j representations $(j_L, j_R)$. Using effective field theory we derive a formula for the conformal dimensions $D(j_L, j_R)$ of the leading operator in terms of two constants, $c_{3/2}$ and $c_{1/2}$, when the sum $j_L + j_R$ is much larger than the difference $|j_L-j_R|$. We compute $D(j_L,j_R)$ when $j_L = j_R$ with Monte Carlo calculations in a discrete formulation of the O(4) lattice field theory, and show excellent agreement with the predicted formula and estimate $c_{3/2}=1.068(4)$ and $c_{1/2}=0.083(3)$. \\ ( https://arxiv.org/abs/1902.09542 , 115kb) ------------------------------------------------------------------------------ \\ arXiv:1902.09847 Date: Tue, 26 Feb 2019 10:28:09 GMT (2641kb,D) Title: Numerical stochastic perturbation theory applied to the twisted Eguchi-Kawai model Authors: Antonio Gonz\'alez-Arroyo, Issaku Kanamori, Ken-Ichi Ishikawa, Kanata Miyahana, Masanori Okawa, and Ryoichiro Ueno Categories: hep-lat Comments: pdflatex 29 pages Report-no: IFT-UAM/CSIC-19-18, FTUAM-19-4, HUPD-1903 \\ We present the results of an exploratory study of the numerical stochastic perturbation theory (NSPT) applied to the four dimensional twisted Eguchi-Kawai (TEK) model. We employ a Kramers type algorithm based on the Generalized Hybrid Molecular Dynamics (GHMD) algorithm. We have computed the perturbative expansion of square Wilson loops up to $O(g^8)$. The results of the first two coefficients (up to $O(g^4)$) have a high precision and match well with the exact values. The next two coefficients can be determined and even extrapolated to large $N$, where they should coincide with the corresponding coefficients for ordinary Yang-Mills theory on an infinite lattice. Our analysis shows the behaviour of the probability distribution for each coefficient tending to Gaussian for larger $N$. The results allow us to establish the requirements to extend this analysis to much higher order. \\ ( https://arxiv.org/abs/1902.09847 , 2641kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1902.09551 (*cross-listing*) Date: Mon, 25 Feb 2019 19:00:01 GMT (3583kb,D) Title: Lattice gauge theories and string dynamics in Rydberg atom quantum simulators Authors: Federica M. Surace, Paolo P. Mazza, Giuliano Giudici, Alessio Lerose, Andrea Gambassi, Marcello Dalmonte Categories: cond-mat.quant-gas cond-mat.stat-mech hep-lat quant-ph \\ Gauge theories are the cornerstone of our understanding of fundamental interactions among particles. Their properties are often probed in dynamical experiments, such as those performed at ion colliders and high-intensity laser facilities. Describing the evolution of these strongly coupled systems is a formidable challenge for classical computers, and represents one of the key open quests for quantum simulation approaches to particle physics phenomena. Here, we show how recent experiments done on Rydberg atom chains naturally realize the real-time dynamics of a lattice gauge theory at system sizes at the boundary of classical computational methods. We prove that the constrained Hamiltonian dynamics induced by strong Rydberg interactions maps exactly onto the one of a $U(1)$ lattice gauge theory. Building on this correspondence, we show that the recently observed anomalously slow dynamics corresponds to a string-inversion mechanism, reminiscent of the string-breaking typically observed in gauge theories. This underlies the generality of this slow dynamics, which we illustrate in the context of one-dimensional quantum electrodynamics on the lattice. Within the same platform, we propose a set of experiments that generically show long-lived oscillations, including the evolution of particle-antiparticle pairs. Our work shows that the state of the art for quantum simulation of lattice gauge theories is at 51 qubits, and connects the recently observed slow dynamics in atomic systems to archetypal phenomena in particle physics \\ ( https://arxiv.org/abs/1902.09551 , 3583kb) ------------------------------------------------------------------------------ \\ arXiv:1902.09926 (*cross-listing*) Date: Tue, 26 Feb 2019 13:43:04 GMT (34kb) Title: Integrating Gauge Fields in the $\zeta$-formulation of Feynman's path integral Authors: Tobias Hartung, Karl Jansen Categories: math-ph hep-lat math.MP math.SP quant-ph Comments: 17 pages \\ In recent work by the authors, a connection between Feynman's path integral and Fourier integral operator $\zeta$-functions has been established as a means of regularizing the vacuum expectation values in quantum field theories. However, most explicit examples using this regularization technique to date, do not consider gauge fields in detail. Here, we address this gap by looking at some well-known physical examples of quantum fields from the Fourier integral operator $\zeta$-function point of view. \\ ( https://arxiv.org/abs/1902.09926 , 34kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1811.09002 (*cross-listing*) replaced with revised version Tue, 26 Feb 2019 05:14:45 GMT (157kb) Title: Three body open flavor decays of higher charmonium and bottomonium Authors: Xin-Zhen Weng, Li-Ye Xiao, Wei-Zhen Deng, Xiao-Lin Chen and Shi-Lin Zhu Categories: hep-ph hep-ex hep-lat Comments: 12 pages, 4 figures \\ ( https://arxiv.org/abs/1811.09002 , 157kb) ------------------------------------------------------------------------------ \\ arXiv:1812.06963 (*cross-listing*) replaced with revised version Tue, 26 Feb 2019 10:04:28 GMT (303kb,D) Title: Emerging $\Delta M_{d}$-Anomaly from Tree-Level Determinations of $|V_{cb}|$ and the Angle $\gamma$ Authors: Monika Blanke, Andrzej J. Buras Categories: hep-ph hep-ex hep-lat Comments: 15 pages, 8 figures, 3 tables. v2: Clarifying comments and one figure added, conclusions unchanged. Matches published version Report-no: TTP18-044, AJB-18-10 Journal-ref: Eur. Phys. J. C 79 (2019) 159 DOI: 10.1140/epjc/s10052-019-6667-x \\ ( https://arxiv.org/abs/1812.06963 , 303kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arxiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arxiv.org/help/