Scheme for on-chip verification of transverse mode entanglement using the electro-optic effect

Area of Science:

• Quantum optics
• Integrated photonics
• Nonlinear optics

Background:

• Coherent manipulation of quantum superpositions is crucial for quantum technologies.
• Transverse spatial modes in integrated optics are promising carriers for quantum information.
• Existing methods for mode transformation can be limited.

Purpose of the Study:

• To propose and theoretically analyze an integrated dynamic mode converter.
• To demonstrate deterministic transformations between non-orthogonal spatial modes.
• To show the potential for violating Bell-type inequalities using spatial mode entanglement.

Main Methods:

• Proposal of an electro-optic dynamic mode converter in nonlinear channel waveguides.
• Theoretical analysis of deterministic spatial mode transformations.
• Numerical simulation using potassium titanyl phosphate (KTP) material.
• Utilizing spatially mode-entangled photon pairs from an integrated source.

Main Results:

• The proposed device enables deterministic transformations between spatial modes.
• Demonstrated the potential to violate a Bell-type Clauser-Horne-Shimony-Holt inequality.
• The configuration is suitable for integrated optical fabrication.

Conclusions:

• The integrated dynamic mode converter is a viable component for quantum-enhanced technologies.
• This approach offers a pathway for generating and manipulating spatial mode entanglement on-chip.
• The technology is compatible with standard fabrication processes.