A research group led by Shuntaro Takeda, a specially appointed lecturer at the University of Tokyo, has developed a circuit that is the heart of the "ultimate large-scale photon computer" method, and realized quantum entanglement synthesis operation, which can be said to be the essence of computational principles.This demonstrated an efficient and general-purpose quantum entanglement synthesis operation that freely synthesizes various quantum entangled optical pulses with a minimum of circuits.
Quantum computers are computers with new operating principles that can solve specific calculations in an overwhelmingly shorter time than modern supercomputers.Conventionally, when generating an optical pulse of quantum entanglement (a situation in which two or more quanta have a special quantum mechanical correlation), the larger the scale of the quantum entanglement to be generated, the larger the optical circuit, and the larger the quantum entanglement. When the type of entanglement changed, it was necessary to rearrange the structure of the optical circuit.
In September 2017, Professor Akira Furusawa and Assistant Professor Shuntaro Takeda (at that time) of the University of Tokyo Graduate School of Engineering announced the "ultimate large-scale photon computer" method that can efficiently execute even large-scale calculations with the smallest circuit configuration. Announced.Experimental verification of this method has been awaited.
In the optical circuit developed this time, the quantum entanglement of 2 to 3 optical pulses and the quantum entanglement of 1000 or more optical pulses can be achieved by simply changing the function switching pattern of the circuit without changing the scale or structure of the circuit. We were able to synthesize entanglements of various sizes and types.This entanglement synthesis operation is the essence of the calculation principle in the "ultimate large-scale photon computer" method.By expanding this circuit, various types of calculations with more than 1000 steps can be performed, leading to the realization of the "ultimate large-scale photon computer" that has both high expandability and versatility.
Paper information:[Science Advances] On-demand photonic entanglement synthesizer
