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431 labs · 111 student voices

Yoshihiro Yamazaki, Professor
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The Yamazaki Lab studies pattern-formation phenomena and behavioral patterns seen in everyday life. The branching of cherry trees, snowflakes, cracks in glass, bacterial colonies, flocks of birds and schools of fish: these forms of nature look complex and diverse at first glance. The lab views them as "patterns" regardless of the fine differences among their components, and tries to bring out the formation mechanisms shared across individual phenomena. From the viewpoints of statistical physics, nonlinear science, and complex systems science, it aims at simple modeling and the extraction of mathematical structures.

Kazuya Yuasa, Professor
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The Yuasa Lab theoretically studies quantum physics and quantum information, with "quantum entanglement" as its keyword. In the microscopic world described by quantum mechanics, many strange phenomena occur. Alongside considering such fundamental problems in quantum theory, the lab investigates quantum-mechanical effects that appear from the microscopic to the mesoscopic scale. The lab also works on the physics of quantum information and quantum technology, which actively exploit quantum correlations and entanglement.

Takao Aoki, Professor
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The Aoki Lab combines quantum optics as a branch of physics with the development of nanophotonic devices as applied physics. At its core is research on cavity QED, which consists of light confined in an optical cavity and atoms interacting with it. The lab has independently developed cavities that use optical fibers thinner than the wavelength of light (nanofibers), and couples them to atoms that have been cooled and trapped with lasers. By pioneering techniques to generate, measure, and manipulate quantum states to the extreme, the lab aims at applications in quantum information and quantum metrology.

Jun Kataoka, Professor
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The Kataoka Lab develops its own highly sensitive cameras that detect X-rays and gamma rays, and applies them to both astronomical observation and medicine. Rare metals such as gold and platinum are thought to be produced in explosive events such as neutron star mergers, which are believed to emit characteristic line X-rays and gamma rays. The lab aims to detect this light from space by mounting the cameras it has developed on ultra-small satellites weighing several tens of kilograms. The lab also brings the same technology into medicine, working on methods to observe from outside the body how drugs move inside it.

Shigeaki Koike, Professor
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The Koike Lab studies, from a mathematical standpoint, the partial differential equations that describe natural phenomena and engineering problems. In many cases the solutions cannot be written as explicit formulas, so the lab first finds a "solution in a weak sense" and then shows that it is a true solution. Equations that arise in engineering and optimal control are called fully nonlinear, and a type of weak solution called a viscosity solution is used for this class. The current focus is regularity theory, which investigates how smooth those viscosity solutions are.

Atsushi Tackeuchi, Professor
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The Tackeuchi Lab investigates the various ultrafast phenomena that occur in semiconductor quantum structures and explores their applications. The lab works on timescales from the picosecond (one trillionth of a second) to the femtosecond (one quadrillionth of a second), the shortest timescales humans can reach. By irradiating semiconductors with extremely short light pulses from specialized lasers, the lab tracks how electrons behave inside them. It aims to clarify the physics needed to make devices such as transistors and lasers even faster, and to connect that understanding to applications.

Hiromichi Niikura, Professor
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Niikura Lab uses lasers that emit light for an extremely short time to measure ultrafast changes in atoms and molecules. One attosecond is 10⁻¹⁸ seconds. Being able to resolve times this short makes it possible to follow the motion of electrons, which is faster than the changes in molecular shape. The measurements use high-intensity ultrashort laser pulses and attosecond laser pulses in the extreme ultraviolet range (high harmonic generation). The aim is to capture changes in the structure and in the electronic states of atoms and molecules.

Takahisa Harayama, Professor
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The Harayama Lab studies the origin and function of randomness and complexity that appear in a wide range of problems, based on nonlinear physics such as chaos. The lab values a perspective that looks simultaneously from both the mathematical, theoretical side and its exact opposite, the applied side. The lab builds theories of chaos in classical dynamical systems, quantum chaos, and wave chaos, and applies the results to nonlinear optics, solid-state physics, and new devices. The lab's style is that stepping into applications, in turn, brings fundamental and theoretical problems to light.

Takeshi Fukuhara, Professor (Fixed-term)
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The Fukuhara Lab uses atoms cooled to ultracold temperatures with lasers to experimentally study the behavior of quantum many-body systems made up of many particles. When particles gather, various phenomena arise from the interactions between particles and from the properties of quantum statistics, but solving the problem generally becomes difficult. Cold atoms can be described by very simple physical models and their conditions can be finely tuned, which makes them an excellent platform for studying quantum many-body systems. The lab aims to deepen understanding by achieving ultimate control over quantum many-body systems, and to connect that understanding to applications.

Takashi Mizokawa, Professor
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The Mizokawa Lab investigates the states of electrons that underlie the electrical, magnetic, and optical properties that various solids exhibit. It uses spectroscopic experimental techniques that employ relatively high-energy light, from ultraviolet to X-rays. When light is shone on a solid in a vacuum, electrons are ejected; by measuring their energy and momentum, one can determine the energy and momentum of the electrons inside the solid. The main subjects are transition-metal compounds and rare-earth compounds that show properties such as magnetism, superconductivity, and metal-insulator transitions.
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