Category: Quantum mechanics
Matchgate games show different entanglement transitions
What the study found The study found that unitary circuit games based on matchgate dynamics can show qualitatively different entanglement transitions depending on the disentangling strategy and the type of gates used. The authors study two cases: one with braiding gates, which are gates that are both Clifford gates and matchgates, and one with generic…
Upper bound estimated for Weyl points from multifold degeneracies
What the study found The study finds an upper bound on the number of Weyl points, meaning generic twofold energy-degeneracy points, that can arise when a multifold degeneracy point in a quantum system is perturbed. Why the authors say this matters The authors say their work helps connect physics and mathematics by using singularity theory…
Hydrodynamic form of non-relativistic quantum mechanics is extended
Reformulation of non-relativistic quantum mechanics using hydrodynamic equations, extended to particles confined to surface waves with specific boundary conditions.
Noisy quantum circuits can behave like shallow circuits
Theoretical analysis of how local noise restricts quantum circuits to shallow depths and prevents barren plateaus, enabling efficient classical simulation of observable expectation value estimation.
Formal expressions for reduced densities in thermofield dynamics
Framework for computing reduced density matrices and Wigner distributions in thermofield dynamics using inverse Bogoliubov transformations, with applications to thermal quantum systems.
Accurate rovibrational levels for He2 a3Σu+ state match spectroscopy
High-precision rovibrational computations for He2 a 3Σu+ state incorporating relativistic, QED, and nonadiabatic corrections with sub-ppm potential energy curve accuracy.
