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Spin-based optomechanics with carbon nanotubes.

Jin-Jin Li1, Ka-Di Zhu

  • 1Key Laboratory of Artificial Structures and Quantum Control (MOE), Department of Physics, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.

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|December 1, 2012
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Summary

This study introduces a novel method to measure spin-orbit coupling strength in carbon nanotube optomechanics using phonon-induced transparency. This approach enables new quantum information processing applications.

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Area of Science:

  • Quantum Optics
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Spin-based optomechanics offers a promising avenue for quantum information processing.
  • Carbon nanotubes provide a robust platform for studying quantum phenomena due to their unique electronic and mechanical properties.
  • Phonon-induced transparency (PIT) is an analogous effect to electromagnetically induced transparency (EIT) in atomic systems, enabling coherent control over light propagation.

Purpose of the Study:

  • To introduce a simple scheme for determining spin-orbit coupling strength in spin-based optomechanics using carbon nanotubes.
  • To leverage the phonon-induced transparency (PIT) effect for coherent control in a spin-nanotube optomechanical system.
  • To conceptually design novel quantum devices, including a single photon router and a quantum microwave transistor.

Main Methods:

  • Utilizing a strong pump field and a weak signal field to control the optomechanical system.
  • Exploiting the coherent coupling between electron spin and the vibrational motion of the carbon nanotube.
  • Applying principles analogous to electromagnetically induced transparency (EIT) in atomic systems.

Main Results:

  • A straightforward method for measuring spin-orbit coupling strength in carbon nanotube optomechanics is presented.
  • The phonon-induced transparency (PIT) mechanism is demonstrated to be effective for coherent control.
  • Conceptual designs for a single photon router and a quantum microwave transistor with ultralow pump power (~ pW) and tunable switching times are proposed.

Conclusions:

  • The proposed spin-nanotube optomechanical system provides a unique platform for studying spin-based microwave quantum optics.
  • This work paves the way for advancements in quantum information processing using carbon nanotube-based devices.
  • The developed scheme offers a simple and efficient way to determine spin-orbit coupling strength, crucial for quantum device applications.