In XX spin chains with open boundaries, a local quench via a single-spin impurity prevents thermalization and produces a strong violation of the eigenstate thermalization hypothesis, including its weak version.
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External electric fields in 3D U(1) quantum dimer models with staggered matter induce geometric fragmentation, weak fragmentation, and fractonic excitations in large winding sectors, producing anomalous thermalization.
Thermalization time in a boundary-coupled 1D chain with approximate pair-flip constraints scales exponentially with system size due to configuration-space bottlenecks.
In a dipole-conserving Bose-Hubbard chain, weak Hilbert-space fragmentation permits thermalization at weak interactions but yields nonergodicity at strong interactions, shown via analytical bounds on frozen states and exact diagonalization of entanglement, relaxation, and level statistics.
Ultracold Rb atoms in a Stark manifold generally fail to reach the predicted thermal state through Rydberg dipole-dipole interactions, approaching it only at the highest tested density.
Granovskii-Zhedanov scar states in XYZ models are described via spectrum-generating algebra with perturbative and optimized constructions, and lattice-independent versions exist only on specific uniform and non-uniform higher-dimensional lattices.
Energy eigenstates in SU(2)-symmetric quantum many-body systems obey a KMS relation whose finite-size correction scales as usual or polynomially larger depending on circumstances, supported by numerics on small Heisenberg chains.
Trotterized near-thermal dynamics are substantially more robust to gate and Trotter errors than assumed, enabled by linear gate-error scaling with entanglement and a random product state ensemble approximating thermal states.
A quantum computer implemented a quantum disease spreading model with up to 73 sites and 72 layers, enabling quantitative measurement of its non-equilibrium phase transition critical properties.
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Weak Fragmentation and Thermalization in a Dipole-Conserving Bose-Hubbard Chain
In a dipole-conserving Bose-Hubbard chain, weak Hilbert-space fragmentation permits thermalization at weak interactions but yields nonergodicity at strong interactions, shown via analytical bounds on frozen states and exact diagonalization of entanglement, relaxation, and level statistics.