Toward a Scalable Linear-Cavity Enhanced Warm-Vapor Photonic Quantum Memory.

Area of Science:

• Quantum Information Science
• Atomic, Molecular, and Optical Physics

Background:

• Coherent photon storage is crucial for scalable quantum computing and communication.
• Off-resonant cascaded absorption (ORCA) in atomic vapors offers broadband, efficient, and noiseless quantum memory capabilities.

Purpose of the Study:

• To implement a cavity-enhanced ORCA quantum memory with reduced footprint and power consumption.
• To demonstrate a compact, efficient, and high-bandwidth quantum memory suitable for large-scale integration.

Main Methods:

• Utilized cavity enhancement to improve the efficiency and reduce the size of the ORCA memory.
• Employed a strong magnetic field and polarization control for Doppler-free interaction, eliminating the need for optical pumping.
• Operated the quantum memory at GHz bandwidth without requiring atom trapping or cryogenic cooling.

Main Results:

• Achieved a reduced footprint and power requirement compared to conventional single-pass ORCA schemes.
• Demonstrated a near-unit efficiency, noiseless quantum memory operating at GHz bandwidth.
• Established the feasibility of creating large arrays of ultracompact, low-power quantum memories.

Conclusions:

• The cavity-enhanced ORCA memory design is a significant advancement for photonic quantum technologies.
• This technology paves the way for scalable quantum communication and quantum computing architectures.
• The system's low power and compact nature, without cryogenics, make it highly practical for widespread implementation.