Is this you? As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.
Claim your profile
Articles by Jad Halimeh
[2610.00129] Global and nonlocal magic of quantum many-body scars
Nonergodic features of chaotic quantum many-body systems are commonly characterized through local observables, fidelity, and entanglement entropy. Here, using global and nonlocal measures of nonstabilizerness (magic), we study quantum many-body scars near infinite temperature in $(1+1)$-dimensional Abelian $\mathbb{Z}_2$ and U$(1)$ lattice gauge theories, both analytically and numerically.
Spin- S U(1) quantum link models with dynamical matter on a quantum simulator
Abstract Quantum link models (QLMs) offer the realistic prospect for the practical implementation of lattice quantum electrodynamics (QED) on modern quantum simulators, and they provide a venue for exploring various nonergodic phenomena relevant to quantum many-body physics. In these models, gauge and electric fields are represented by spin-S operators. So far, large-scale realizations of QLMs have been restricted to S = 1/2 representations, whereas the lattice-QED limit is approached at S → ∞.
A universal framework for the quantum simulation of Yang–Mills theory - Communications Physics
Abstract Quantum computers promise to simulate complex quantum field theories that are intractable for classical computers, potentially revealing new physics in strongly interacting systems. Current approaches for simulating Yang-Mills gauge theories face significant technical barriers due to complex group structures and complicated truncation schemes that vary drastically between different theories.
Hilbert space fragmentation at the origin of disorder-free localization in the lattice Schwinger model - Communications Physics
Abstract Lattice gauge theories, the discrete counterparts of continuum gauge theories, provide a rich framework for studying non-equilibrium quantum dynamics. Recent studies suggest disorder-free localization in the lattice Schwinger model, but its origin remains unclear.
Cold-atom quantum simulators of gauge theories - Nature Physics
Abstract Gauge theories constitute the basis of the Standard Model and provide useful descriptions of various phenomena in condensed matter. Realizing gauge theories on tunable tabletop quantum devices such as cold-atom quantum simulators offers the possibility to study their dynamics from first principles and to probe effects that are out of reach of dedicated particle colliders, such as deviations from gauge invariance.
Confinement in a $${{\mathbb{Z}}}_{2}$$ Z 2 lattice gauge theory on a quantum computer - Nature Physics
Abstract Gauge theories describe the fundamental forces in the standard model of particle physics and play an important role in condensed-matter physics. The constituents of gauge theories, for example, charged matter and electric gauge field, are governed by local gauge constraints, which lead to key phenomena such as the confinement of particles that are not fully understood. In this context, quantum simulators may address questions that are challenging for classical methods.
Spin Exchange-Enabled Quantum Simulator for Large-Scale Non-Abelian Gauge Theories
Popular Summary Gauge theories are a powerful framework to describe fundamental constituents of matter: from the standard model of particles physics to emergent low-energy theories in condensed matter physics. Their strong-coupling limit, relevant for neutron stars and quantum spin liquids, are inherently challenging to simulate numerically. This has motivated the design of large-scale quantum simulators of non-Abelian lattice gauge theories, which have remained elusive.
Confinement in $(1+1)$-dimensional ${\mathbb{Z}}_{2}$ lattice gauge theories at finite temperature
Confinement is a paradigmatic phenomenon of gauge theories, and its understanding lies at the forefront of high-energy physics. Here, we study confinement in a simple one-dimensional Z2 lattice gauge theory at finite temperature and filling, which is within the reach of current cold-atom and superconducting-qubit platforms.
Protecting Hilbert space fragmentation through quantum Zeno dynamics
Hilbert space fragmentation is an intriguing paradigm of ergodicity breaking in interacting quantum many-body systems with applications to quantum information technology, but it is usually adversely compromised in the presence of perturbations. In this work, we demonstrate the protection of constrained dynamics arising due to a combination of mirror symmetry and Hilbert space fragmentation by employing the concept of quantum Zeno dynamics.
Anatomy of dynamical quantum phase transitions
Global quenches of quantum many-body models can give rise to periodic dynamical quantum phase transitions (DQPTs) directly connected to the zeros of a Landau order parameter (OP). The associated dynamics has been argued to bear a close resemblance to Rabi oscillations characteristic of two-level systems. Here, we address the question of whether this DQPT behavior is merely a manifestation of the limit of an effective two-level system or if it can arise as part of a more complex dynamics.
Reliability of lattice gauge theories in the thermodynamic limit
Abstract Although gauge invariance is a postulate in fundamental theories of nature such as quantum electrodynamics, in quantum-simulation implementations of gauge theories it is compromised by experimental imperfections. In a recent paper [Halimeh and Hauke, Phys. Rev. Lett.
Tuning the Topological $\ensuremath{\theta}$-Angle in Cold-Atom Quantum Simulators of Gauge Theories
Abstract The topological θ-angle in gauge theories engenders a series of fundamental phenomena, including violations of charge-parity (CP) symmetry, dynamical topological transitions, and confinement-deconfinement transitions. At the same time, it poses major challenges for theoretical studies, as it implies a sign problem in numerical simulations.
Toward the continuum limit of a $(1+1)\mathrm{D}$ quantum link Schwinger model
Abstract The solution of gauge theories is one of the most promising applications of quantum technologies. Here, we discuss the approach to the continuum limit for U(1) gauge theories regularized via finite-dimensional Hilbert spaces of quantum spin-S operators, known as quantum link models.
Stabilizing lattice gauge theories through simplified local pseudogenerators
Abstract The postulate of gauge invariance in nature does not lend itself directly to implementations of lattice gauge theories in modern setups of quantum synthetic matter. Unavoidable gauge-breaking errors in such devices require gauge invariance to be enforced for faithful quantum simulation of gauge-theory physics. This poses major experimental challenges, in large part due to the complexity of the gauge-symmetry generators.
Enhancing Disorder-Free Localization through Dynamically Emergent Local Symmetries
Abstract Disorder-free localization is a recently discovered phenomenon of nonergodicity that can emerge in quantum many-body systems hosting gauge symmetries when the initial state is prepared in a superposition of gauge superselection sectors. Thermalization is then prevented up to all accessible evolution times despite the model being nonintegrable and translation invariant.
Projective symmetry group classification of chiral ${\mathbb{Z}}_{2}$ spin liquids on the pyrochlore lattice: Application to the spin-$\frac{1}{2}$ XXZ Heisenberg model
Abstract We give a complete classification of fully symmetric as well as chiral Z2 quantum spin liquids on the pyrochlore lattice using a projective symmetry group analysis of Schwinger boson mean-field states. We find 50 independent Ansätze, including the 12 fully symmetric nearest-neighbor Z2 spin liquids that have been classified by Liu et al. [Phys. Rev. B 100, 075125 (2019)]. For each class, we specify the most general symmetry-allowed mean-field Hamiltonian.
Local measures of dynamical quantum phase transitions
Abstract In recent years, dynamical quantum phase transitions (DQPTs) have emerged as a useful theoretical concept to characterize nonequilibrium states of quantum matter. DQPTs are marked by singular behavior in an effective free energy λ(t), which, however, is a global measure, making its experimental or theoretical detection challenging in general. We introduce two local measures for the detection of DQPTs with the advantage of requiring fewer resources than the full effective free energy.
Time-of-flight imaging of invisibility cloaks
B. Zhang, Y. Luo, X. Liu, and G. Barbastathis, “Macroscopic invisibility cloak for visible light,” Phys. Rev. Lett. 106(3), 033901 (2011). [Crossref] [PubMed] X. Chen, Y. Luo, J. Zhang, K. Jiang, J. B. Pendry, and S. Zhang, “Macroscopic invisibility cloaking of visible light,” Nat Commun 2, 176 (2011). [Crossref] [PubMed] J. Fischer, T. Ergin, and M. Wegener, “Three-dimensional polarization-independent visible-frequency carpet invisibility cloak,” Opt. Lett. 36(11), 2059–2061 (2011). [Crossref] [PubMed] M. Gharghi, C.
Lebanon Forces Syrian Families to Decide Between Homelessness and Child Labor · Global Voices
According to the United Nations, the Syrian conflict has displaced approximately 6.6 million people in Syria, and forced another 4.8 million to seek refuge in countries around the world. Due to its proximity to Syria, Lebanon is one of the main destinations for those fleeing the violence. There are approximately 1 million Syrian refugees officially registered with the UNHCR in Lebanon, while unofficial estimates put that figure closer to 1,500,000 people.
Show More
loading
Actions
Is this you?
As a journalist, you can create a free Muck Rack account to customize your profile, list your contact preferences, and upload a portfolio of your best work.Get in touch with Jad
Contact Jad, search articles and posts on X, monitor coverage, and track replies from one place.
Learn more about Muck Rack