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quant-ph2026
Onset of a quantum Fisher-Selke sequence in the transverse-field ANNNI model and its bilayer
Tuan-Vu Truong, Vu-Quoc-Minh Nguyen, Hoang-Long Nguyen +1
We study the transverse-field axial next-nearest-neighbor Ising (ANNNI) model on the square lattice and on a bilayer. At the classical multiphase point , every confi…
quant-ph2026
Zero- Versus Infinite-Temperature Damping in Variational Quantum Circuits: Feature Scale, Sampling Cost, and Frame Gauge
Vu-Quoc-Minh Nguyen, Tuan-Vu Truong, Hoang-Long Nguyen +1
The Pauli twirl of amplitude damping (AD) is generalized amplitude damping at infinite temperature: it keeps the contraction of AD and removes its non-unital term, so comparing the…