Fast and robust quantum state transfer via a topological chain
- URL: http://arxiv.org/abs/2009.09164v1
- Date: Sat, 19 Sep 2020 04:39:47 GMT
- Title: Fast and robust quantum state transfer via a topological chain
- Authors: N. E. Palaiodimopoulos, I. Brouzos, F. K. Diakonos and G. Theocharis
- Abstract summary: We propose a fast and robust quantum state transfer protocol employing a Su-Schrieffer-Heeger chain.
By numerically investigating the resilience of each protocol to static noise, we highlight the robustness of the exponential driving.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We propose a fast and robust quantum state transfer protocol employing a
Su-Schrieffer-Heeger chain, where the interchain couplings vary in time. Based
on simple considerations around the terms involved in the definition of the
adiabatic invariant, we construct an exponential time-driving function that
successfully takes advantage of resonant effects to speed up the transfer
process. Using optimal control theory, we confirm that the proposed
time-driving function is close to optimal. To unravel the crucial aspects of
our construction, we proceed to a comparison with two other protocols. One
where the underlying Su-Schrieffer-Heeger chain is adiabatically time-driven
and another where the underlying chain is topologically trivial and resonant
effects are at work. By numerically investigating the resilience of each
protocol to static noise, we highlight the robustness of the exponential
driving.
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