Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Quantum Communications and Quantum Imaging

Optical quantum information processing and storage

Hisashi Ogawa, Takahiro Serikawa, Yu Shiozawa, Masanori Okada, Warit Asavanant, A. Sakaguchi, Naoto Takanashi, Fumiya Okamoto, Kan Takase, Masaya Kobayashi, Shuntaro Takeda, Akira Furusawa, Jun–ichi Yoshikawa, Yosuke Hashimoto, Shota Yokoyama, Peter van Loock

Published Sep 18, 2018• 1 citation
Publisher

Abstract

Here we report our recent experimental progresses in optical quantum information processing. In particular, the following topics are included. First, we extend the heralding scheme to multi-mode states and demonstrate heralded creation of qutrit states. Next, we demonstrate storage of single-photon states and synchronized release of them. Then, we demonstrate real-time acquisition of quadrature values of heralded states by making use of an exponentially rising shape of wave-packets. Finally, we demonstrate cluster states in an arbitrarily long chain in the longitudinal direction.

DOI
10.1117/12.2320476

Related papers

Continuous-variable quantum optical experiments in the time domain using squeezed states and heralded non-Gaussian states

Jun–ichi Yoshikawa, Yosuke Hashimoto, Hisashi Ogawa +4 more

Continuous-variable quantum information processing with optical field quadrature amplitudes is advantageous in deterministic creation of Gaussian entanglement. On the other hand, non-Gaussian state preparation and operation are currently limited, but heralding schemes potentially overcome this difficulty. Here, we summarize our recent progress in continuous-variable quantum optical experiments. In particular, we have recently succeeded in creation of ultra-large-scale cluster-type entanglement with full inseparability, multiplexed in the time domain; storage and on-demand release of heralded single-photon states, which is applied to synchronization of two heralded single-photon states; real-time quadrature measurements regarding non-Gaussian single-photon states with exponentially rising wavepackets; squeezing with relatively broader bandwidth by using triangle optical parametric oscillator.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 20, 2017•1 citation

Real-Time Quadrature Measurement of a Highly Pure Single-Photon State in an Exponentially Rising Wave Packet

Hisashi Ogawa, Hideaki Ohdan, Kazunori Miyata +5 more

We experimentally demonstrate real-time quadrature measurement of a highly pure single-photon state whose temporal wave-packet mode is in an exponentially rising shape generated by an asymmetric optical parametric oscillator.

Frontiers in Optics•Jan 1, 2015•0 citations

Photonic quantum information processing beyond single-photon qubits

Hyunseok Jeong

In this talk, I will discuss several schemes for all-optical quantum information processing that have been developed to overcome formidable limitations of the well-known approaches based on single-photon qubits and continuous-variable states.

Frontiers in Optics•Jan 1, 2015•0 citations

Optical technologies for quantum information science

Paul G. Kwiat, Joseph B. Altepeter, Julio T. Barreiro +4 more

A number of optical technologies remain to be developed and optimized for various applications in quantum information processing, especially quantum communication. We will give an overview of our approach to some of these, including periodic heralded single-photon sources based on spontaneous parametric down-conversion, ultrabright sources of tunable entangled photons, near unit efficiency single- and multi-photon detectors based on an atomic vapor interaction, quantum state transducers based on high efficiency frequency up-conversion, and low-loss optical quantum memories.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 3, 2004•4 citations

Real-Time Quadrature Measurement of a Single-Photon Wave Packet with Continuous Temporal-Mode Matching

Hisashi Ogawa, Hideaki Ohdan, Kazunori Miyata +5 more

Real-time controls based on quantum measurements are powerful tools for various quantum protocols. However, their experimental realization has been limited by mode mismatch between the temporal mode of quadrature measurement and that heralded by photon detection. Here, we demonstrate real-time quadrature measurement of a single-photon wave packet induced by photon detection by utilizing continuous temporal-mode matching between homodyne detection and an exponentially rising temporal mode. Single photons in exponentially rising modes are also expected to be useful resources for interactions with other quantum systems.

arXiv:1507.06172•Physical Review Letters•Jun 8, 2016•46 citations

Tools and Technology for Optical Quantum Information Processing

Paul G. Kwiat, Scott M. Jobling, Kevin T. McCusker +1 more

Practical optical quantum information processing requires a suite of advanced quantum photonic technologies, including high-efficiency sources and detectors, and low-loss storage and interconnects. We report on our progress toward these goals.

Frontiers in Optics•Jan 1, 2008•0 citations
Here we report our recent experimental progresses in optical quantum information processing. In particular, the following topics are included. First, we extend the heralding scheme to multi-mode states and demonstrate heralded creation of qutrit states. Next, we demonstrate storage of single-photon states and synchronized release of them. Then, we demonstrate real-time acquisition of quadrature values of heralded states by making use of an exponentially rising shape of wave-packets. Finally, we demonstrate cluster states in an arbitrarily long chain in the longitudinal direction.
Continuous-variable quantum information processing with optical field quadrature amplitudes is advantageous in deterministic creation of Gaussian entanglement. On the other hand, non-Gaussian state preparation and operation are currently limited, but heralding schemes potentially overcome this difficulty. Here, we summarize our recent progress in continuous-variable quantum optical experiments. In particular, we have recently succeeded in creation of ultra-large-scale cluster-type entanglement with full inseparability, multiplexed in the time domain; storage and on-demand release of heralded single-photon states, which is applied to synchronization of two heralded single-photon states; real-time quadrature measurements regarding non-Gaussian single-photon states with exponentially rising wavepackets; squeezing with relatively broader bandwidth by using triangle optical parametric oscillator.
A number of optical technologies remain to be developed and optimized for various applications in quantum information processing, especially quantum communication. We will give an overview of our approach to some of these, including periodic heralded single-photon sources based on spontaneous parametric down-conversion, ultrabright sources of tunable entangled photons, near unit efficiency single- and multi-photon detectors based on an atomic vapor interaction, quantum state transducers based on high efficiency frequency up-conversion, and low-loss optical quantum memories.
Real-time controls based on quantum measurements are powerful tools for various quantum protocols. However, their experimental realization has been limited by mode mismatch between the temporal mode of quadrature measurement and that heralded by photon detection. Here, we demonstrate real-time quadrature measurement of a single-photon wave packet induced by photon detection by utilizing continuous temporal-mode matching between homodyne detection and an exponentially rising temporal mode. Single photons in exponentially rising modes are also expected to be useful resources for interactions with other quantum systems.