We present a manifestation of a Parrondo's effect in a continuous -time quantum walk (CTQW). In our protocol we consider a CTQW in the presence of a time -dependent transition defect. Our results show that the alternation between defects, that individually are detrimental to the wavepacket spreading, can paradoxically enhance overall wavepacket propagation. Our findings pave the way for the exploration of unconventional mechanisms that can potentially harness the adverse effects of defects to enhance quantum transport.
机构:
Clarkson Univ, Dept Phys, Potsdam, NY 13676 USAClarkson Univ, Dept Math & Comp Sci, Potsdam, NY 13676 USA
ben-Avraham, D.
Bollt, E. M.
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Clarkson Univ, Dept Math & Comp Sci, Potsdam, NY 13676 USA
Clarkson Univ, Dept Phys, Potsdam, NY 13676 USAClarkson Univ, Dept Math & Comp Sci, Potsdam, NY 13676 USA
Bollt, E. M.
Tamon, C.
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Clarkson Univ, Dept Math & Comp Sci, Potsdam, NY 13676 USA
Clarkson Univ, Ctr Quantum Device Technol, Potsdam, NY 13676 USAClarkson Univ, Dept Math & Comp Sci, Potsdam, NY 13676 USA