Hideaki Takayanagi

Coherent Control of Coupled Superconducting Macroscopic Quantum Systems

In addition to Rabi, Ramsey, and spin echo experiments for a single qubit, we have successfully demonstrated the conditional operations with more complex pulse sequences of a qubit interacting with an LC harmonic oscillator. Rabi oscillations between |e,0〉 ↔ |g,1〉 (red sideband) and |g,0〉 ↔ |e,1〉 (blue sideband) were observed, where we noted coupled state as |qubit, LC‐oscillator〉. If we consider an LC‐oscillator as a quantum information bus, this is a first step to demonstrate the Cirac‐Zoller scheme in a field of macroscopic superconducting circuit.

The Visualization of Pedestrian Flow Efficiency with Interfering Area Model

The purpose of this study is to evaluate the pedestrian space with time series interfering area model. The model illustrates the interference of pedestrians area in the several directions. And the coordinates of pedestrians are sensed and used for evaluation of the space. The “time series interfering area model” describes the load between pedestrians in the several directions. This models advantage is as follows; (1) The characteristics of pedestrian loads in a time series are grasped and comprehended with it. (2) As the congestion in the observation area in a time series is observed, and the area is evaluated particularly. (3) The situations of intersecting pedestrians in the several directions are grasped.