2024/08/07 by Mrinmoy Kundu, Kundu, Mrinmoy, Bejoy Sikder +7 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices #Photorefractive and Nonlinear Optics #Quantum Physics (quant-ph) #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.2408.03550
openalex publication_date 2024/08/07 · openalex created_date 2024/10/22 · openalex updated_date 2026/07/28
Single photons and squeezed light are the two primary workhorses for quantum computation and quantum communication. Generating high-efficiency single photons with high purity and heralding efficiency is the prerequisite for photonic quantum computers. At the same time, generating high-efficiency scalable squeezed light is the prerequisite for continuous variable quantum computing along with sensing applications. Here, we propose a symmetric ring-Mach-Zehnder interferometer (RMZI), which includes a periodically poled lithium niobate (PPLN) waveguide as an efficient source of squeezed light and a single-photon source. We numerically show that our proposed design can generate tunable squeezed light with a squeezing level higher than -12dB with sub-milli-watt (mW) pump power. The proposed device can also generate single photons with purity as high as 99(95)% with heralding efficiency 94(99)% using only 20ps long pulses. Our proposed design is fully compatible with current fabrication technology.