2026/03/31 by Can Yesilyurt
Physics and Astronomy · #cond-mat.mes-hall #quant-ph
arxiv created 2026/07/30 · arxiv updated 2026/07/31
Valley degrees of freedom represent a promising resource for solid-state quantum information. This work demonstrates electrostatic control of the valley-dependent phase in tilted Dirac/Weyl semimetals. When wave packets traverse a shaped electrostatic barrier, the valley-dependent tilt induces differential spatial drift and dwell times, resulting in the accumulation of a continuously tunable relative dynamical phase. The barrier thereby functions as a valley-phase shift element. Time-dependent transport simulations employing a coupled two-valley model yield electrically tunable relative phases between equal-energy valleys, including π/4, π/2, and π, with high transmission probabilities.