Quantum backflow for a massless Dirac fermion on a ring

Simulating quantum backflow on a quantum computer

“…Thus, the classically forbidden probability transfer can reach values up to approximately 0.116 816 in the case of a particle rotating on a ring (figure 1) [4] and can be arbitrarily high in two-dimensional systems [5][6][7]. Recently, the problem of QB on a ring has also been considered for the case of a massless Dirac fermion [8]. The literature on QB is substantial, and reviewing it goes beyond the scope of the present paper.…”

“…The literature on QB is substantial, and reviewing it goes beyond the scope of the present paper. The reader is referred to [9] for an elementary introduction and to [8,10] for an extensive list of references to more recent results in the area.…”