Topological energy transfer in an optomechanical system with exceptional points

Area of Science:

• Quantum Optics
• Optomechanics
• Condensed Matter Physics

Background:

• Topological operations offer robust control by bypassing local operational details.
• Previous work proposed topological operations for controlling states in degenerate subspaces and geometric phases.
• Theoretical predictions suggested topological operations could transfer energy between normal modes at exceptional points.

Purpose of the Study:

• To experimentally demonstrate energy transfer between vibrational modes using topological operations.
• To investigate the role of exceptional points in mediating this energy transfer.
• To explore the non-reciprocal nature of the demonstrated energy transfer.

Main Methods:

• Utilized a cryogenic optomechanical device to host two coupled vibrational modes.
• Implemented topological operations to manipulate the system's energy landscape.
• Analyzed the device's spectral properties to identify the presence of an exceptional point.

Main Results:

• Successfully demonstrated the transfer of energy between the two vibrational modes via topological operations.
• Confirmed that the observed energy transfer is a direct consequence of an exceptional point in the system's spectrum.
• Showcased that the energy transfer process is non-reciprocal.

Conclusions:

• The experimental demonstration validates the use of topological operations for energy transfer in optomechanical systems.
• The findings highlight the significance of exceptional points as a mechanism for controlled energy dynamics.
• This work paves the way for exploring novel control schemes and studying dynamical effects near exceptional points.