Phys.org May 6, 2022 Most optical-chaos-based random bit generators perform their quantization process in the electrical domain using electrical analog-to-digital converters, so their real-time rates in a single channel are severely limited at the level of Gb/s due to the electronic bottleneck. An international team of researchers (China, UK) has experimentally demonstrated an all-optical method for random bit generation where chaotic pulses are quantized into a physical random bit stream in the all-optical domain by means of a length of highly nonlinear fiber. Using their method, they generated a 10-Gb/s random bit stream on-line. The single-channel real-time rate is limited […]
Tag Archives: Qubit generation
What a pair! Coupled quantum dots may offer a new way to store quantum information
Science Daily January 29, 2020 An international team of researchers (USA – NIST, University of Maryland, Japan, Canada) created weakly coupled quantum dots by using the ultrasharp tip of a scanning tunneling microscope as a stylus hovering the tip above an ultracold sheet of graphene briefly increasing the voltage of the tip penetrating through the graphene into an underlying layer of boron nitride. It stripped electrons from atomic impurities in the layer and created electric charge which corralled freely floating electrons in the graphene, confining them to a tiny energy well. When a magnetic field of 4 to 8 tesla […]