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quant-ph2026
A thermally and perturbatively stable classical spin model in two dimensions
Shankar Balasubramanian, Margarita Davydova, Ting-Chun Lin +1
We show that the 2D classical spin model constructed in arXiv:2605.10943 hosts many metastable states at non-zero temperature which are stable to arbitrary Hamiltonian perturbation…
quant-ph2026
Perturbatively Stable Self-Correcting Classical Memory from Gauge Averaging
Ryan Thorngren
We show that the self-correcting memory in 3d Wegner gauge theory is stable to arbitrary small enough perturbations of the Hamiltonian. Our proof relies on a new method we dub ``ga…
quant-ph2026
Translation symmetry-enforced long-range entanglement in mixed states
Ryan Thorngren, Lei Gioia, Carolyn Zhang
We show by a counting argument that even though translation symmetry admits symmetric short-range entangled (SRE) eigenstates, there are not enough such SRE eigenstates to span the…