Dynamics and Control of Quantum Many-body Systems

Recent progress in nanotechnology enables us to directly address quantum transport of electrons in nano-devices made of metal or semiconductor. For example, the wave nature of electrons can be controlled in electronic interferometers (“Aharonov-Bohm rings”), while their particle nature is accessible in quantum dots (“artificial atoms”). We can even combine these two kinds of devices into one, where the wave-particle duality in quantum mechanics manifests itself. The advantage of such research field, which is called “mesoscopic physics” or “nanophysics”, lies in the controllability and the versatile degrees of freedom in the device design. We try to understand and control various novel quantum, many-body, and nonequilibrium effects in nano-devices in terms of the dynamical aspects of electron transport.