Real-time dynamics of string breaking in quantum spin chains

R Verdel, F Liu, S Whitsitt, AV Gorshkov, M Heyl - Physical Review B, 2020‏ - APS
String breaking is a central dynamical process in theories featuring confinement, where a
string connecting two charges decays at the expense of the creation of new particle …

Van Hove singularity in the magnon spectrum of the antiferromagnetic quantum honeycomb lattice

G Sala, MB Stone, BK Rai, AF May, P Laurell… - Nature …, 2021‏ - nature.com
In quantum magnets, magnetic moments fluctuate heavily and are strongly entangled with
each other, a fundamental distinction from classical magnetism. Here, with inelastic neutron …

Magnetic properties of the quasi-XY Shastry-Sutherland magnet

A Brassington, Q Ma, G Sala, AI Kolesnikov… - Physical Review …, 2024‏ - APS
Polycrystalline and single-crystal samples of the insulating Shastry-Sutherland compound Er
2 Be 2 SiO 7 were synthesized via a solid-state reaction and the floating zone method …

Thermalization of interacting quasi-one-dimensional systems

M Panfil, S Gopalakrishnan, RM Konik - Physical review letters, 2023‏ - APS
Many experimentally relevant systems are quasi-one-dimensional, consisting of nearly
decoupled chains. In these systems, there is a natural separation of scales between the …

Amplitude mode in quantum magnets via dimensional crossover

C Zhou, Z Yan, HQ Wu, K Sun, OA Starykh, ZY Meng - Physical Review Letters, 2021‏ - APS
We investigate the amplitude (Higgs) mode associated with longitudinal fluctuations of the
order parameter at the continuous spontaneous symmetry breaking phase transition. In …

Spin chain on a metallic surface: Dissipation-induced order versus Kondo entanglement

B Danu, M Vojta, T Grover, FF Assaad - Physical Review B, 2022‏ - APS
We explore the physics of a spin-1/2 Heisenberg chain with Kondo interaction, J k, to a two-
dimensional electron gas. At weak J k the problem maps onto a Heisenberg chain locally …

Field-induced partial disorder in a Shastry-Sutherland lattice

M Marshall, BR Billingsley, X Bai, Q Ma, T Kong… - Nature …, 2023‏ - nature.com
A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below TN= 2.9 K in the
Shastry-Sutherland lattice BaNd2ZnS5 by single crystal neutron diffraction. The magnetic …

Studies of spinons, majoranas, and monopoles in spin liquid and quantum critical magnets with neutrons

DA Tennant - Journal of the Physical Society of Japan, 2019‏ - journals.jps.jp
Quantum and frustrated materials have outstanding potential for the future with the promise
of transformative properties in energy storage, conversion, and transmission as well as for …

Spectral evolution of the antiferromagnetic Heisenberg model: From one to two dimensions

C Gu, ZL Gu, SL Yu, JX Li - Physical Review B, 2023‏ - APS
We employ spin-cluster perturbation theory to investigate the evolution of the spin excitation
spectra of the mixed-dimensional antiferromagnetic s= 1 2 Heisenberg models from the one …

Critical phase induced by Berry phase and dissipation in a spin chain

S Martin, T Grover - Physical Review Research, 2023‏ - APS
Motivated by experiments on spin chains embedded in a metallic bath, as well as closed
quantum systems described by long-range interacting Hamiltonians, we study a critical SU …