The University of Tokyo: Developed photon processor: Quantum communication, sensing, imaging
-To realize the “ultimate large-scale photon computer”-
The University of Tokyo:
November 13th, in research on quantum computers using light,
Single and different kinds of calculations,
Can perform multi-step calculations,
Announced that it has succeeded in developing a universal computing circuit “photon processor”.
Quantum computer:
Certain calculations can be performed faster than current supercomputers.
Various types of computers are being developed all over the world.
Superiority of optical method:
This time, the research team worked on a method using light.
Unlike other methods, it can operate in normal temperature atmosphere.
Good compatibility with quantum communication using light.
It has strengths such as high-speed calculation with a high clock.
Disadvantages of conventional photon computers:
Multiple calculations require a large number of circuits.
There was a drawback that the computer circuit became large.
Development of photon processor:
Place one universal computing circuit and loop it over and over again.
Efficient calculation is possible with the smallest circuit.
Invented the “ultimate large-scale photon computer” method in 2017.
This study:
Without changing the circuit
A versatile calculation circuit becomes possible,
Succeeded in developing a photon processor.
Application to photon technology:
Extensibility that can repeat multi-step calculation and
It has the versatility required to change the calculation type,
All-purpose operation can be performed with one photon processor.
This contributes to the realization of the ultimate large-scale photon computer.
Quantum communication and
Quantum sensing,
Quantum imaging, etc.
It is expected to be applied to photon technology.
–ITmedia
https://www.itmedia.co.jp/news/articles/2111/15/news114.html
Developed a versatile photon processor that can execute various calculations in any number of steps The University of Tokyo, Japan Science and Technology Agency (JST)
https://www.jst.go.jp/pr/announce/20211113/index.html
Programmable and sequential Gaussian gates in a loop-based single-mode photonic quantum processor
Abstract
A quantum processor to import, process, and export optical quantum states
is a common core technology enabling various photonic quantum information processing.
However,
there has been no photonic processor that is simultaneously universal, scalable, and programmable.Here,
we report on an original loop-based single-mode versatile photonic quantum processor that is designed to be universal, scalable, and programmable.Our processor can perform arbitrarily many steps of programmable quantum operations
on a given single-mode optical quantum state by time-domain processing in a dynamically controlled loop-based optical circuit.
We use this processor
to demonstrate programmable single-mode Gaussian gates and multistep squeezing gates.In addition,
we prove that the processor can perform universal quantum operations by injecting appropriate ancillary states and also be straightforwardly extended to a multimode processor.These results show that
our processor is programmable, scalable, and potentially universal, leading to be suitable for general-purpose applications.