Non-integrable power-law spin chains exhibit robust KPZ-like z=3/2 superdiffusive spin transport due to proximity to integrable Inozemtsev models.
Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator
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abstract
We use a Rydberg quantum simulator to demonstrate a new form of spectroscopy, called quench spectroscopy, which probes the low-energy excitations of a many-body system. We illustrate the method on a two-dimensional simulation of the spin-1/2 dipolar XY model. Through microscopic measurements of the spatial spin correlation dynamics following a quench, we extract the dispersion relation of the elementary excitations for both ferro- and anti-ferromagnetic couplings. We observe qualitatively different behaviors between the two cases that result from the long-range nature of the interactions, and the frustration inherent in the antiferromagnet. In particular, the ferromagnet exhibits elementary excitations behaving as linear spin waves. In the anti-ferromagnet, spin waves appear to decay, suggesting the presence of strong nonlinearities. Our demonstration highlights the importance of power-law interactions on the excitation spectrum of a many-body system.
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Brillouin-Wigner perturbation theory plus Hartree-Fock mean-field approximation upgrades quasiparticle nuclear Hamiltonians, yielding <0.2% and ~2% ground-state energy errors versus exact shell-model results in the sd shell while preserving qubit efficiency.
The quantum 1D hard rod model shows Tomonaga-Luttinger liquid behavior across wide parameter ranges at zero and finite temperature, with thermodynamic quantities deviating from the Lieb-Liniger model at high densities, validated by analytical and numerical methods.
citing papers explorer
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Robustness of Kardar-Parisi-Zhang-like transport in long-range interacting quantum spin chains
Non-integrable power-law spin chains exhibit robust KPZ-like z=3/2 superdiffusive spin transport due to proximity to integrable Inozemtsev models.
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Improved quasiparticle nuclear Hamiltonians for quantum computing
Brillouin-Wigner perturbation theory plus Hartree-Fock mean-field approximation upgrades quasiparticle nuclear Hamiltonians, yielding <0.2% and ~2% ground-state energy errors versus exact shell-model results in the sd shell while preserving qubit efficiency.
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Thermodynamics and Tomonaga-Luttinger liquid behavior of the quantum 1D hard rod model
The quantum 1D hard rod model shows Tomonaga-Luttinger liquid behavior across wide parameter ranges at zero and finite temperature, with thermodynamic quantities deviating from the Lieb-Liniger model at high densities, validated by analytical and numerical methods.