Kiyotaka Aikawa

Development of a laser refrigerator for levitated nanoparticles in vacuum

Researcher

Kiyotaka Aikawa

Outline

Understanding and controlling mesoscpoic systems, which are larger than single molecules and smaller than bulk materials, are still a challenging task. In this project, we explore a laser-trapped nanoparticles levitated in vacuum as a new mescoscopic system. We develop the technique of controlling both their center-of-mass motion and their internal states and realize a laser refrigerator, that is useful for a quantum control in solids and measurements using nanoparticles.

Shinya Kato

Research on coupled open quantum systems including biological environment with quantum optical techniques

Researcher

Shinya Kato

Outline

The coupled cavity quantum electrodynamics (cQED) system is an emergent research field to study quantum many-body physics. In order to realize the coupled cQED system, we utilize a novel cQED setup, which is directly embedded in a standard optical fiber network. Our strategy possesses outstanding flexibility to construct and manipulate the network topology. Our design will pave the way to study a complex coupled quantum system, such as photosynthetic pigment protein complexes, with sophisticated quantum optics techniques.

Daisuke Kiriya

Research on coupled open quantum systems including biological environment with quantum optical techniques

Researcher

Daisuke Kiriya

Outline

The coupled cavity quantum electrodynamics (cQED) system is an emergent research field to study quantum many-body physics. In order to realize the coupled cQED system, we utilize a novel cQED setup, which is directly embedded in a standard optical fiber network. Our strategy possesses outstanding flexibility to construct and manipulate the network topology. Our design will pave the way to study a complex coupled quantum system, such as photosynthetic pigment protein complexes, with sophisticated quantum optics techniques.

Seiji Sugawa

Novel non-Abelian and topological quantum phenomena through high-precision control of ultracold atomic gases

Researcher

Seiji Sugawa

Outline

Laser-cooled ultracold atomic quantum gases offers an unique possiblity to study many-body phenomena. In this project, using the ultimate controllablity of the atom including its internal states, we will develop and engineer a system that will open up a possibility to study novel geometrical and topological quantum phenomena that originate from non-Abelian gauge fields.

Shu Tanaka

Study on quantum annealing toward high-performance machine learning

Researcher

Shu Tanaka

Outline

The purpose of my study is to extend the application range of quantum annealing toward high-performance machine learning. I will propose a new method to solve hard problems in machine learning by using quantum annealing. Besides, I will show tangible examples of quantum annealing based machine learning. I firmly believe that my research creates fundamental technology that will be at the forefront of ubiquitous quantum-information based society.

Makoto Negoro

Creation of Novel Quantum Information Processing through the Technological Development of Scalable Molecular Spin Control.

Researcher

Makoto Negoro

Outline

In this research, I develop technologies for global gate operation and fast initialization of qubit systems of nuclear and/or electron spins in molecules. Through the technological development, I realize useful quantum functions which is superior to functions provided by classical devices or classical algorithms. They are, for example, quantum machine learning, quantum reservoir computing, quantum dynamics simulation, quantum storage, and high-gain spin amplification.

Atsushi Noguchi

Quantum control of the electromechanics with a surface acoustic wave

Researcher

Atsushi Noguchi

Outline

A superconducting quantum circuit realizes one of the best quantum systems in an electrical circuit. The controllability of the superconducting circuit introduces the quantum control of the other systems. Here I try to demonstrate the quantum hybrid system of the surface acoustic wave and the superconducting circuit. The surface acoustic wave is the one of most stable systems in the bulk crystals and can be a good interface of a light and superconducting circuit. I also try to achieve a chiral system with the surface acoustic wave. This system shows the non-reciprocity without a magnetic field.

Keisuke Fujii

Intelligent quantum system design for quantum computation and simulation

Researcher

Keisuke Fujii

Outline

By virtue of the rapid progress on experimental technologies for quantum information processing, more and more complex quantum dynamics are now available for quantum simulation and computation. In order to obtain useful knowledge from such controlled quantum dynamics and to make full use of it, I will design quantum systems cleverly based on the knowledge of the underlying physical systems. This allows us to verify “quantum supremacy” of the quantum systems over classical systems, and opens up new applications of them.

Taro Yamashita

Scalable quantum technique by superconducting phase control devices

Researcher

Taro Yamashita

Outline

The project goal is to solve issues toward large-scale superconducting quantum circuits by using a novel phase control technique with superconducting spintronics and realize a scalable quantum technique. By realizing low-decoherence superconducting quantum bits with spin Josephson junction and ultralow-consumption power superconducting logic circuits, fundamental basis of the scalable and intelligent superconducting quantum computing systems will be constructed.

Naoki Yamamoto

Quantum functionalization via feedback amplification

Researcher

Naoki Yamamoto

Outline

Feedback control of an amplifier, particularly an operational amplifier, enables realizing a large variety of useful functions in almost all current technological systems. The ultimate goal of this research is to extend this classical methodology to quantum domain and develop a general theory for designing various quantum-mechanical functions, which would bring drastic improvement or novel applications in quantum information science. For example, quantum active filters and quantum differentiator/integrator will be available by properly synthesizing a quantum feedback amplification architecture, and those new functions will enable realizing a high-precision detector for superconducting quantum bits and a novel quantum analogue-digital transducer.