Abstract:
Advances in quantum algorithms which outperform their best known classical counterparts have prompted scientists to build a practical quantum computer. Shor’s quantum factoring algorithm, for example, can enabled a quantum computer, if available, to break the cryptographic keys and thus compromise the security of the currently existing cryptosystems. Due to exponential growth of the number of basis states in Hilbert space with the quantum bit (qubit) number n, the computational capabilities of a 100-qubit quantum computing system for some problems are already beyond those of today’s classical computing systems, achieving "quantum supremacy". In other words, 100-qubit or more-qubit quantum processors, available in the next 5 to 10 years, may be able to solve some problems that cannot be solved by today's most powerful supercomputers.
In this talk, I will give an overview and recent developments in building practical quantum computers and recent progress in the emerging and exciting field of quantum computing. In particular, I will describe and discuss the prospects and challenges for realizing a quantum computer using semiconductor silicon-based quantum-dot spin qubits.
Brief Bio:
Professor Hsi-Sheng Goan received his Ph.D. degrees in Physics from the University of Maryland, College Park, USA in 1999. He then worked as a postdoctoral research fellow at the University of Queensland, Brisbane, Australia from 1999-2001. From 2002-2004, he was a senior research fellow awarded the Hewlett-Packard Fellowship at the Center for Quantum Computer Technology at the University of New South Wales, Sydney, Australia before he took up a faculty position at the Department of Physics, National Taiwan University in 2005. He is currently a Professor of Physics at NTU working in the fields of Quantum Computing and Quantum Information Theory, Quantum Control, Mesoscopic (Nano) Physics, and Quantum Optics (Theory).