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Production and Targeting of Monovalent Quantum Dots
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Fast long-range charge transfer in quantum dot arrays.

Yue Ban1,2, Xi Chen3, Gloria Platero1

  • 1Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain.

Nanotechnology
|September 13, 2018
PubMed
Summary
This summary is machine-generated.

We propose a faster method for quantum information transfer in quantum dot arrays, improving fidelity and reducing errors. This technique speeds up adiabatic protocols, enabling robust long-range charge and state transfer.

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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Quantum Computing

Background:

  • Efficient charge and spin transfer in quantum dot (QD) arrays is crucial for quantum information processing.
  • Adiabatic protocols offer direct, long-range charge transfer but are limited by decoherence.
  • Existing methods struggle with maintaining high fidelity during quantum state transfer.

Purpose of the Study:

  • To develop a high-fidelity protocol for direct charge transfer between outer dots in a QD array.
  • To accelerate adiabatic transfer protocols to enhance process fidelity.
  • To investigate the trade-offs between transfer fidelity and operation time under dephasing.

Main Methods:

  • Utilizing shortcuts to adiabaticity by engineering control pulses.
  • Implementing fast adiabatic-like protocols for direct charge transfer.
  • Analyzing the impact of dephasing on transfer fidelity and operational speed.

Main Results:

  • Demonstrated a method for fast, adiabatic-like direct charge transfer between outer QDs.
  • Achieved increased fidelity in quantum state transfer by accelerating the adiabatic process.
  • Quantified the relationship between transfer fidelity, operation time, and dephasing effects.

Conclusions:

  • The proposed accelerated adiabatic protocols provide a robust mechanism for quantum information transfer.
  • Minimizing decoherence and relaxation processes enhances the reliability of long-range charge and state transfer.
  • This approach offers a promising solution for high-fidelity quantum communication in solid-state devices.