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Manipulating quantum information with spin torque.

Brian Sutton1, Supriyo Datta1

  • 1School of Electrical and Computer Engineering and Purdue Quantum Center, Purdue University, West Lafayette, IN, 47907.

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|December 10, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel quantum computing method using spin torque effects for qubit operations. The approach leverages itinerant electrons to perform single and two-qubit gates with high fidelity.

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Area of Science:

  • Quantum Computing
  • Spintronics
  • Quantum Information Science

Background:

  • Spin torque is established for classical nanomagnet switching.
  • Quantum operations traditionally rely on magnetic fields or other methods.

Purpose of the Study:

  • To explore spin torque-like effects for quantum processes.
  • To implement single and two-qubit operations using itinerant electrons.
  • To demonstrate a CNOT gate with high fidelity.

Main Methods:

  • Utilizing a large number of itinerant electrons to induce qubit operations on static spins.
  • Designing the system to minimize non-unitary effects from wavefunction collapse.
  • Implementing a complete CNOT gate within the proposed architecture.

Main Results:

  • Demonstrated approximate unitary operations for qubit manipulation.
  • Successfully implemented a complete CNOT gate.
  • Achieved high fidelity (close to one) under ideal conditions.

Conclusions:

  • Spin torque-like effects offer a viable pathway for quantum computation.
  • The proposed architecture enables high-fidelity quantum gate operations.
  • This method provides a promising alternative for scalable quantum computing architectures.