Chinese scientists have made major breakthroughs in the field of quantum computers
Recently, Professor Pan Jianwei of the University of Science and Technology of China and his colleague Professor Lu Chaoyang have made a milestone breakthrough in quantum computer research. The relevant research results have been accepted by the international authoritative academic journal "Natural Photonics". In the optical system, our team of scientists first realized the use of high-quality quantum dot single photon source to build a quantum computing prototype, and demonstrated its computing power beyond the classical electronic computer (ENIAC) and transistor computer (TRADIC), to the real "quantum The era of computing hegemony has taken an important step.
Figure 1 Schematic diagram of the quantum calculation experiment of boson sampling. The experiment is mainly made up of single photon devices.
Multi-channel de-serializer, low-loss photonic circuit (9-mode interferometer), detector and other components
"We have found two key methods to achieve efficient boson sampling: ultra-low loss multiphoton interferometers with high efficiency, high purity, indistinguishable multiplexed quantum dot single photon sources. We implemented Three, four, and five boson samples were sampled at a rate that was at least 2,4000 times faster than all previous experiments, about the first electronic computer (ENIAC) and transistor computer (TRADIC) in human history. It's 10-100 times faster. This is the first time that a single-photon quantum machine has surpassed the early classic computers. Our work is a new beginning in the field of optical quantum computing technology, not just proof of principle, the quantum machine built this time is substantially beyond Two generations of computer prototypes."
-- Professor Lu Chaoyang, Professor, Shanghai Research Institute, University of Science and Technology of China
Figure 2. High-efficiency and indistinguishable single-photon sources: (a) single-photon devices rate up to 9MHz, and (b) single-photon non-resolutions up to 0.939.
Low-loss multiphoton interferometer: mode amplitude (c) and phase (d) results after multi-channel decoder input and 9-mode interferometer output
Figure 3 3-, 4- and 5-boson sampling calculation results, operating frequency of 4.96kHz, 151Hz, 4Hz.
Experiments confirm that quantum optical computer works faster than the first electronic computer ENIAC and transistor computer TRADIC
Prior to this, Professor Lu Chaoyang was selected by Nature as one of the ten scientists who made great contributions to the scientific community in June 2016, called the “Scientific Star of Chinaâ€. “The nine-story platform starts from the ground.†From 2016 to 2017, the research team has published a series of excellent quantum computing related articles. The results of this quantum computing experiment are based on a solid foundation. of.
The single-photon device (high-efficiency and indistinguishable single-photon source) in the quantum computing experiment, Lu teacher's group used the attoDRY cryostat produced by Attocube, Germany, low-temperature stage and scanning station, low-temperature objective lens and other equipment. . We also believe that the two teachers will be able to climb the scientific research peak again in the quantum field.
The research team of the China University of Science and Technology recently published relevant literature:
First experimental quantum computing paper: High-efficiency multiphoton boson sampling (Nature Photonics, 2017)
The first realization of 10 photon entanglement papers: Experimental ten-photon entanglement, arXiv: 1605.08547, Phys. Rev. Lett. (2016)
Single photon device paper: Time-bin-encoded sampling with a single-photon device (PRL, 2017)
High Unresolvable Single Photon Source Paper: On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar (PRL, 2016)
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