Theory of deconfined pseudocriticality

R Ma, C Wang - Physical Review B, 2020 - APS
It has been proposed that the deconfined criticality in (2+ 1) d—the quantum phase transition
between a Néel antiferromagnet and a valence-bond solid (VBS)—may actually be …

Emergent self-duality in a long-range critical spin chain: From deconfined criticality to first-order transition

S Yang, Z Pan, DC Lu, XJ Yu - Physical Review B, 2023 - APS
Over the past few decades, tremendous efforts have been devoted to understanding self-
duality at the quantum critical point, which enlarges the global symmetry and constrains the …

Walking through Hilbert space with quantum computers

T Jiang, J Zhang, MKA Baumgarten, MF Chen… - arXiv preprint arXiv …, 2024 - arxiv.org
Computations of chemical systems' equilibrium properties and non-equilibrium dynamics
have been suspected of being a" killer app" for quantum computers. This review highlights …

Competition between Neel, Haldane nematic, plaquette valence bond solid, and valence bond solid phases in analogs of square-lattice …

S Kundu, N Desai, K Damle - Physical Review B, 2024 - APS
We use stochastic series expansion (SSE) quantum Monte Carlo (QMC) methods to study
the phases and transitions displayed by a class of sign-free designer Hamiltonians for SU …

Quantum entanglement and criticality in a one-dimensional deconfined quantum critical point

S Yang, JB Xu - Physical Review E, 2021 - APS
We investigate the ground-state quantum entanglement in a one-dimensional incarnation of
deconfined quantum critical point by making use of the finite-size density matrix …

Deconfined pseudocriticality in a model spin-1 quantum antiferromagnet

V Vijigiri, S Pujari, N Desai - arXiv preprint arXiv:2307.14254, 2023 - arxiv.org
Berry phase interference arguments that underlie the theory of deconfined quantum
criticality (DQC) for spin-1/2 antiferromagnets have also been invoked to allow for …

First-order Néel–valence-bond-solid transition in antiferromagnets

F Zhang, W Guo, RK Kaul - Physical Review B, 2024 - APS
We study the transition between Néel and columnar valence-bond solid ordering in two-
dimensional S= 3/2 square lattice quantum antiferromagnets with SO (3) symmetry …

Exploring dynamical quantum phase transitions in a spin model with deconfined critical point via the quantum steering ellipsoid

CX Li, S Yang, JB Xu, HQ Lin - Physical Review B, 2023 - APS
The dynamical quantum phase transition (DQPT), which is featured by the nonanalytic
behavior of the Loschmidt rate function in the real time evolution, has attracted substantial …

Manipulating topology of quantum phase transitions by symmetry enhancement

G Rein, M Raczkowski, Z Wang, T Sato… - arXiv preprint arXiv …, 2024 - arxiv.org
Topology plays a cardinal role in explaining phases and quantum phase transitions beyond
the Landau-Ginzburg-Wilson paradigm. In this study, we formulate a set of models of Dirac …

Weakly first-order quantum phase transition between spin-nematic and valence-bond crystal order in a square-lattice SU (4) fermionic model

P Patil, F Alet, S Capponi, M Mambrini - Physical Review B, 2022 - APS
We consider a model Hamiltonian with two SU (4) fermions per site on a square lattice,
showing a competition between bilinear and biquadratic interactions. This model has …