A Photon Nanotrap Opens the Way for a Quantum Chip Without Cooling
Scientists at the Stevens Institute of Technology have created a device that brings us closer to quantum computers working at room temperature. It works at very low energy levels, therefore, it can be optimized to the level of individual photons, that is, to create a full-fledged quantum computer. The team of Professor Juan Jupin released a laser beam into a microcavity carved in a crystal. The trapped light was reflected from the walls of the cavity. So the photons had to interact with each other, creating a harmonious resonance, as a result, some of them changed the wavelength. This technique is not new, but Juan and his colleagues significantly increased its efficiency by using a lithium niobate plate as a material. It has a unique ability to change the wavelength of visible and infrared radiation. They drilled a cavity in the plate in the form of an annular race track one-hundredth of a human hair wide. Scientists processed it in a special way to increase the likelihood of photon interaction. All this required dozens of complex procedures at the nanoscale. The ability of a crystal to retain and recycle light increased at least ten times. This is not the limit, but each increase in this value makes the system more sensitive to minor temperature fluctuations and requires careful tuning.