Official web site of Takeuchi Lab, Univ. Tokyo

Research projects in the Lab

Quest for out-of-equilibrium scaling laws using liquid crystal turbulence

KPZ universal fluctuations in growing turbulent interfaces

Growing interfaces turned out to be ruled by universal laws linked to various areas of physics and mathematics.

Universal critical phenomenon discovered in topological-defect turbulence

All up once you have entered... The directed percolation universality class, theoretically expected in such a situation, was experimentally found for the first time.

Physical experiments on microbial systems

Extensive microperfusion system (EMPS) for bacterial population experiments

With this new microfluidic device, we can culture and observe bacteria for long time under a uniform condi­tion. Several projects on bacterial populations are ongoing with this device.

Scale invariance in cell size fluctuations

With EMPS, we experi­mentally found universal scaling laws in cell size fluctuations.
(to appear soon)

Active matter physics

Emergent order in bacterial collective motion

How and when can any order emerge in usually turbulent dense bacterial collective motion? Our experimental findings led to a general framework.

Collective motion of self-propelled colloidal particles

By using active colloids fuelled by an electric field, we explore universal non-equilibrium laws in self-propelled particle systems.

Statistical characterization of large chaotic systems

Time-series analysis for measuring instability of large chaotic systems

We develop a new method of time-series analysis for measuring instability of large chaotic systems, applicable when the system is highly symmetric.
(to appear soon)

New developments on instability analysis

Using Lyapunov vectors that became numerically accessible recently, we characterized collective instability and effective dimensions of large chaotic systems.