Quantum large-scale integrated circuits or just around the corner

According to the report of the American Physicist Organization Network on September 2, scientists at the University of California, Santa Barbara, announced that they successfully implemented the von Neumann structure through quantum circuits, confirming the classical computer architecture in the field of quantum information processing. The value of future quantum LSI or just around the corner. The relevant research was published in the online edition of "Science Express" magazine.

The von Neumann structure, also called Princeton structure, is a computer design structure. The main point is: the computer uses binary mode of operation; the processor uses the same memory and transmits via the same bus; the computer must have at least memory, controller, computing device, and input and output devices. This structure defines the basic structure of a modern electronic computer. From the world's first modern computer, Enyac, to the most advanced computer, almost all adopt the von Neumann architecture.

The University of California research team programmed a long-lived quantum random-access memory (SRAM) into a quantum central processor and installed it on a chip together with other components to form a classic computer architecture. The circuit includes two qubits (qubits), a quantum bus, two-bit quantum memory, and a reset register. All hardware is based on superconducting quantum circuits and operates at a very low temperature to protect against other interference factors.

Mathu Mariantummi of the University of California, Santa Barbara, said: "In the new quantum computer architecture, we have explored the possibility of writing quantum information into memory while performing other quantum calculations. Now the platform has Being able to perform the Quantum Fourier Transform and the three-qubit Toffoli Gate - this is the key to the computational energy of quantum computers."

Marian Tumi said that although the study is only a small improvement compared with traditional computers, it is also gratifying that given that a quantum computer can perform a large number of calculations at the same time, it has much more computing power than a traditional computer. .