3 papers
cond-mat.str-el2025
Goldstone modes and the golden spiral in the ferromagnetic spin-1 biquadratic model
Huan-Qiang Zhou, Qian-Qian Shi, Ian P. McCulloch +1
Ferromagnetic ground states have often been overlooked in comparison to seemingly more interesting antiferromagnetic ground states. However, both the physical and mathematical stru…
cond-mat.str-el2025
Fractal dimension and the counting rule of the Goldstone modes
Qian-Qian Shi, Yan-Wei Dai, Huan-Qiang Zhou +1
It is argued that there are a set of orthonormal basis states, which appear as highly degenerate ground states arising from spontaneous symmetry breaking with a type-B Goldstone mo…
quant-ph2025
Wavefunction branching: when you can't tell pure states from mixed states
Jordan K. Taylor, Ian P. McCulloch
We propose a definition of wavefunction "branchings": quantum superpositions which can't be feasibly distinguished from the corresponding mixed state, even under time evolution. Ou…