The Future is Quantum: 20 - 22 February 2023

An emerging field of physics and engineering is quantum technology, encompassing technologies that rely on the properties of quantum mechanics. Quantum computing being one example of these technologies, representing a paradigm shift for computing technology, since it can outperform much more than existing computers. On February 21 at 13:00, in the: Svedberg salen (FD5), AlbaNova, Professor Akira Furusawa from University of Tokyo, RIKEN Center for Quantum Computing will have a presentation with the title THE FUTURE IS QUANTUM - The development of Quantum Computing.

The Future is Quantum
The Future is Quantum

The conference will take part at IVA Conference Centre on February 20, at Albanova on February 21 and at Chalmers on February 22. Please look at the program in the enclosed document.

The Future is Quantum (788 Kb) - the Program

February 21, 2023 Albanova

Time: 13:00
Location: Svedberg salen (FD5), AlbaNova
- Opening remarks by Fredrik Laurell, Professor, KTH /IVA and Mohamed Bourennane, Professor, Stockholm University
- Presentation by JSPS
- Optical Quantum Computers with Quantum Teleportation, Akira Furusawa,  Professor University of Tokyo, RIKEN Center for Quantum Computing
Lecturer: Prof. Akira Furusawa, University of Tokyo, RIKEN Center for Quantum Computing
Registration: No registration is required for this lecture.

The development of Quantum Computing

We did the first experiment of unconditional quantum teleportation at  Caltech in 1998[1]. Then we did various related experiments like quantum  teleportation network[2], teleportation of Schrödinger’s cat state[3],  and deterministic quantum teleportation of photonic qubits[4].

We invented the scheme of teleportation-based quantum computing in  2013[5]. In this scheme, we can multiplex quantum information in the  time domain and we can build a large-scale optical quantum computer only  with four squeezers, five beam splitters, and two optical delay  lines[6].

For universal quantum computing with this scheme, we need a nonlinear  measurement and we invented the efficient way[7]. We recently succeeded  in the realization[8].

Our present goal is to build a super quantum computer with 100GHz clock  frequency and hundred cores, which can solve any problems faster than  conventional computers without efficient quantum algorithms like Shor’s  algorithm. Toward this goal we started to combine our optical quantum  computer with 5G technologies[9].

1. A. Furusawa et al., Science 282, 706 (1998).
2. H. Yonezawa et al., Nature 431, 430 (2004).
3. N. Lee et al., Science 332, 330 (2011).
4. S. Takeda et al., Nature 500, 315 (2013).
5. S. Yokoyama et al., Nature Photonics 7, 982 (2013).
6. W. Asavanant et al., Science 366, 375 (2019).
7. K. Miyata et al., Phys. Rev. A 93, 022301 (2016).
8. A. Sakaguchi et al., arXiv:2210.17120 [quant-ph].
9. A. Inoue et al., arXiv:2205.14061 [quant-ph].

More information

Japan Society for the Promotion of Science, JSPS
Professor Furusawa
Google scholar