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quant-ph2026
An upper bound for the purity of absolutely positive partial transpose states
Anh T. Tran
A quantum state is called absolutely separable (resp. absolutely positive partial transpose (APPT)) if it remains separable (resp. positive partial transpose (PPT)) under any globa…
math.GT2026
Algebraic properties of twisted Alexander polynomial and Reidemeister torsion of torus knots
Takayuki Morifuji, Anh T. Tran
In this paper we prove that every coefficient of twisted Alexander polynomials of torus knots associated with irreducible -representations is an -val…