Furusawa, AkiraOptical quantum computers with quantum teleportation
ORAL · Invited
Abstract
Memorial Session for Jeff Kimble
a Department of Applied Physics, School of Engineering, The University of Tokyo
b RIKEN Center for quantum computing
c OptQC Corporation
We did the first experiment of unconditional quantum teleportation with Jeff Kimble 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].
For the realization of fault-tolerance with our optical quantum computers, we use Gottesman-Kitaev-Preskill (GKP) qubits [10]. We recently succeeded in the generation [11] and invented an efficient way for the generation [12].
We built a real machine of optical quantum computer in Riken and put it on the cloud in 2024. We will work on Shor’s algorithm and a neural network with the real machine.
[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., Nature Communications 14, 3817 (2023).
[9] A. Inoue et al., Appl. Phys. Lett. 122, 104001 (2023).
[10] D. Gottesman, A. Kitaev, and J. Preskill, Phys. Rev. A 64, 012310 (2001).
[11] S. Konno et al., Science 383, 6680 (2024).
[12] K. Takase et al., Phys. Rev. A 110, 012436 (2024).
a Department of Applied Physics, School of Engineering, The University of Tokyo
b RIKEN Center for quantum computing
c OptQC Corporation
We did the first experiment of unconditional quantum teleportation with Jeff Kimble 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].
For the realization of fault-tolerance with our optical quantum computers, we use Gottesman-Kitaev-Preskill (GKP) qubits [10]. We recently succeeded in the generation [11] and invented an efficient way for the generation [12].
We built a real machine of optical quantum computer in Riken and put it on the cloud in 2024. We will work on Shor’s algorithm and a neural network with the real machine.
[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., Nature Communications 14, 3817 (2023).
[9] A. Inoue et al., Appl. Phys. Lett. 122, 104001 (2023).
[10] D. Gottesman, A. Kitaev, and J. Preskill, Phys. Rev. A 64, 012310 (2001).
[11] S. Konno et al., Science 383, 6680 (2024).
[12] K. Takase et al., Phys. Rev. A 110, 012436 (2024).
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Presenters
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Akira Furusawa
Univ of Tokyo
Authors
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Akira Furusawa
Univ of Tokyo