Clifford+T-based quantum high speed multiplier

Nowadays, rapid advancement in quantum algorithm towards achieving so-called quantum supremacy, calls for the design of high scalable quantum circuit. Quantum computers are very sensitive towards noise. To suppress inherent noise, the fault tolerant quantum circuit becomes desirable feature which can be achieved by using quantum error correction code. Surface code is one of the promising error correction code that addresses this issue. The Clifford+T group is one universal gates set which is used with surface code. In VLSI, multiplier circuit has very crucial role in the design of digital computer and becomes a pivotal in the application of DSP. Here, we have implemented a high speed quantum multiplier circuit using Clifford+T. At the end of this work, we evaluated some cost parameters like T-depth associated with the performance of quantum circuit as shown in the result section.