A quantum computer is a computing machine that operates on fundamentally different principles, and it can also be developed using semiconductor technology. In this context, I'd like to introduce the semiconductor quantum computer that our company is currently working on.
The FinFET technology is a cutting-edge approach used in modern semiconductor processes. It involves a 3D structural design that allows for an increased number of contact points with the gate. At SEMICON, we received numerous questions about this new quantum chips.
FinFET is a state-of-the-art technique used in recent semiconductor processes. It involves a 3D structural approach that allows for an increase in contact points with the gate.
reference
The quantum bits (qubits) showcased at this SEMICON event are known as silicon spin qubits. These qubits utilize the FinFET structure to control electrons.
From the source side, a single electron is supplied and trapped beneath the plunger gates, which are surrounded by both barrier gates. By applying a unidirectional magnetic field to the trapped electron, we achieve spin polarization through Zeeman splitting, and we use alternating magnetic fields to perform computations by rotating the spin. In quantum computing, the direction of the spin corresponds to the computation itself.
When asked about the gate linewidth, I responded that it is currently around 20nm. Considering that commercial equipment capable of using FinFET technology is also limited, it is likely that quantum computers will continue to evolve by incorporating various cutting-edge technologies to improve their performance.
In the Nikkei article, it can be observed that quantum dots are being used for storage.
image: https://xtech.nikkei.com/atcl/nxt/column/18/00001/07064/
To achieve multiple quantum bits, it can be realized by extending this pattern continuously, allowing for the realization of numerous quantum bits.
In the future, as we aim to increase the number of quantum bits while addressing the challenge of individual qubit control, this becomes a fundamental engineering task. Procurement of equipment and talent development are among the primary challenges.
Furthermore, we have plans to integrate different semiconductor chips with various functionalities, such as chiplet integration, to enhance the performance of quantum computers. It's an exciting field to look forward to. Additionally, a domestically developed cryocooler is in progress, signifying the intensifying efforts in the development of semiconductor-based quantum chips.
Anticipating a rapid rise in the number of quantum bits and the advancement of control mechanisms using existing commercial CMOS semiconductor lines, we are eagerly expecting a significant leap forward, akin to a dark horse.
Let's work together to advance the fields of semiconductors and quantum technologies!"