Fri·Oct 7, 2022Friday·October 7, 2022

1. 01*

   The Gross-Neveu-Yukawa Archipelago

   Rajeev S. Erramilli🇺🇸 · Luca V. Iliesiu🇺🇸 · Petr Kravchuk🇺🇸 · Aike Liu🇺🇸 · David Poland🇺🇸 · David Simmons-Duffin🇺🇸

   We perform a bootstrap analysis of a mixed system of four-point functions of bosonic and fermionic operators in parity-preserving 3d CFTs with O(N) global symmetry. Our results provide rigorous bounds on the scaling dimensions of the O(N)-symmetric Gross-Neveu-Yukawa (GNY) fixed points, constraining these theories to live in isolated islands in the space of CFT data. We focus on the cases N = 1, 2, 4, 8, which have applications to phase transitions in condensed matter systems, and compare our bounds to previous analytical and numerical results.

   ↳ hep-thcond-mat.stat-mechcond-mat.str-elhep-latJHEP(2023)·77 citations
2. 02*

   Coupled Fredkin and Motzkin chains from quantum six- and nineteen-vertex models

   Zhao Zhang🇮🇹 · Israel Klich🇺🇸

   We generalize the area-law violating models of Fredkin and Motzkin spin chains into two dimensions by building quantum six- and nineteen-vertex models with correlated interactions. The Hamiltonian is frustration free, and its projectors generate ergodic dynamics within the subspace of height configuration that are non negative. The ground state is a volume- and color-weighted superposition of classical bi-color vertex configurations with non-negative heights in the bulk and zero height on the boundary. The entanglement entropy between subsystems has a phase transition as the $q$-deformation parameter is tuned, which is shown to be robust in the presence of an external field acting on the color degree of freedom. The ground state undergoes a quantum phase transition between area- and volume-law entanglement phases with a critical point where entanglement entropy scales as a function $L\log L$ of the linear system size $L$. Intermediate power law scalings between $L\log L$ and $L^2$ can be achieved with an inhomogeneous deformation parameter that approaches 1 at different rates in the thermodynamic limit. For the $q>1$ phase, we construct a variational wave function that establishes an upper bound on the spectral gap that scales as $q^{-L^3/8}$.

   ↳ quant-phcond-mat.stat-mechcond-mat.str-elhep-lat+2SciPost Phys.(2023)·15 citations
3. 03*

   Studying chirality imbalance with quantum algorithms

   Alexander M. Czajka🇺🇸 · Zhong-Bo Kang🇺🇸 · Yuxuan Tee🇺🇸 · Fanyi Zhao🇺🇸

   To describe the chiral magnetic effect, the chiral chemical potential ${\mu }_5$ is introduced to imitate the impact of topological charge changing transitions in the quark-gluon plasma under the influence of an external magnetic field. We employ the (1+1) dimensional Nambu-Jona-Lasinio (NJL) model to study the chiral phase structure and chirality charge density of strongly interacting matter with finite chiral chemical potential ${\mu }_5$ in a quantum simulator. By performing the Quantum imaginary time evolution (QITE) algorithm, we simulate the (1+1) dimensional NJL model on the lattice at various temperature $T$ and chemical potentials $\mu$, ${\mu }_5$ and find that the quantum simulations are in good agreement with analytical calculations as well as exact diagonalization of the lattice Hamiltonian.

   ↳ hep-phhep-exhep-latnucl-th+17 citations
4. 04*

   Quantum computation of dynamical quantum phase transitions and entanglement tomography in a lattice gauge theory

   Niklas Mueller🇺🇸 · Joseph A. Carolan🇺🇸 · Andrew Connelly🇺🇸 · Zohreh Davoudi🇺🇸 · Eugene F. Dumitrescu🇺🇸 · Kübra Yeter-Aydeniz🇺🇸

   Strongly-coupled gauge theories far from equilibrium may exhibit unique features that could illuminate the physics of the early universe and of hadron and ion colliders. Studying real-time phenomena has proven challenging with classical-simulation methods, but is a natural application of quantum simulation. To demonstrate this prospect, we quantum compute non-equal time correlation functions and perform entanglement tomography of non-equilibrium states of a simple lattice gauge theory, the Schwinger model, using a trapped-ion quantum computer by IonQ Inc. As an ideal target for near-term devices, a recently-predicted [Zache et al., Phys. Rev. Lett. 122, 050403 (2019)] dynamical quantum phase transition in this model is studied by preparing, quenching, and tracking the subsequent non-equilibrium dynamics in three ways: i) overlap echos signaling dynamical transitions, ii) non-equal time correlation functions with an underlying topological nature, and iii) the entanglement structure of non-equilibrium states, including entanglement Hamiltonians. These results constitute the first observation of a dynamical quantum phase transition in a lattice gauge theory on a quantum computer, and are a first step toward investigating topological phenomena in nuclear and high-energy physics using quantum technologies.

   ↳ quant-phhep-lathep-phnucl-thPRX Quantum(2023)·97 citations
5. 05*

   Snowmass Topical Summary: Formal QFT

   David Poland🇺🇸 · Leonardo Rastelli🇺🇸

   We attempt to give a broad conceptual overview of modern quantum field theory, highlighting important recent developments. This report serves as the TF03 topical group summary for Snowmass 2021.

   ↳ hep-thcond-mat.stat-mechhep-lathep-ph+29 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.