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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Coherently driven semiconductor quantum dot at a telecommunication wavelength.

Hiroyuki Takagi¹, Toshihiro Nakaoka, Katsuyuki Watanabe

¹Institute for Nano Quantum Information Electronics, and Institute of Industrial Science, University of Tokyo, Tokyo, Japan.

|September 6, 2008

Summary

We demonstrate optical pulses for quantum gates using excitons in quantum dots. This telecom-wavelength approach enables practical quantum information processing via fiber optics.

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Area of Science:

Quantum Information Science
Optoelectronics
Solid-State Physics

Background:

Quantum computing relies on coherent manipulation of quantum bits (qubits).
Excitons in quantum dots offer a promising platform for qubit implementation.
Optical control of qubits is essential for scalable quantum networks.

Purpose of the Study:

To demonstrate optical driving pulses at a telecommunication wavelength for exciton-based quantum gate operation.
To integrate quantum dot qubits with standard fiber optic infrastructure.
To advance practical optical quantum information processing.

Main Methods:

Coherent manipulation of excitons in self-assembled quantum dots using Rabi oscillations.
Utilizing optical driving pulses at a 1.3 micrometer telecommunication wavelength.
Incorporating standard optical fibers and fiber optic devices for system integration.

Main Results:

Successful coherent manipulation of an exciton-qubit system at 1.3 micrometers.
Demonstration of quantum gate operation using optical pulses.
Compatibility of the exciton-qubit system with standard fiber optic networks.

Conclusions:

Optical driving pulses at telecommunication wavelengths are effective for exciton-based quantum gate operations.
The developed system is compatible with flexible and stable fiber networks.
This work paves the way for practical optical implementation of quantum information processing devices.