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Toward Quantum Computing with Molecular Electronics.

Phillip W K Jensen1, Lasse Bjørn Kristensen1,2, Cyrille Lavigne1,2

  • 1Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5G 1Z8, Canada.

Journal of Chemical Theory and Computation
|May 10, 2022
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Summary
This summary is machine-generated.

This study introduces molecular electronics for quantum computing, building one-qubit gates via electron scattering and two-qubit gates using electron-electron interactions. Molecular hydrogen serves as a model for initial gate implementations.

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Area of Science:

  • Quantum Computing
  • Molecular Electronics
  • Quantum Information Science

Background:

  • Quantum computing harnesses quantum-mechanical phenomena for computation.
  • Molecular electronics offers a scalable platform for quantum device fabrication.
  • Controlling electron interactions is key to implementing quantum logic gates.

Purpose of the Study:

  • To explore the application of molecules and molecular electronics in quantum computing.
  • To design and propose methods for constructing one- and two-qubit gates using molecular systems.
  • To demonstrate the feasibility of a molecular quantum computing framework.

Main Methods:

  • Utilizing one-electron scattering within molecules to construct one-qubit gates.
  • Employing electron-electron scattering along metallic leads for two-qubit controlled-phase gates.
  • Proposing a class of circuit implementations for molecular quantum gates.

Main Results:

  • Successful construction of one-qubit gates based on molecular electronic structure.
  • Demonstration of two-qubit controlled-phase gates using electron scattering.
  • Illustration of one-qubit gates using the molecular hydrogen electronic structure as a model.

Conclusions:

  • Molecular electronics provide a viable pathway for building quantum gates.
  • The proposed framework enables the implementation of essential quantum computing operations.
  • This research lays the groundwork for future molecular quantum computer designs.