A novel and easy to implement method to generate narrow-band (~ 10 MHz bandwidth) multi-photon states using cavity enhanced spontaneous parametric down-conversion (CE-SPDC)

Background

The generation of narrow-band single and multi-photon states with a long coherence length is an important step for reliable quantum applications.

Technology Applications

• Quantum information applications:
  • interaction between multi-photon states and highly non-linear media ( e.g. ultra-cold atomic vapours, solid state systems)
  • implement and characterize photonic multi-qubit gates and quantum memories
• Quantum communication
• Quantum key distribution (QKD) protocols
• High resolution quantum metrology

Benefits:

• Very long coherence length and very precise frequency.
• Tunable to atomic transitions.
• Single frequency operation by a novel, low-loss mode selection scheme.
• Capable of emitting multi-photon states.