Seminar "Toward Visualization of Quantum Dynamics" by Dr. Yutaka Shikano, Institute for Molecular Science

Title: Toward Visualization of Quantum Dynamics

Speaker: Dr. Yutaka Shikano, Research Associate Professor

Affiliation:National Institutes of Nature Sciences Institute for Molecular Science

Abstract:

Understanding and controlling complex quantum dynamical system must be the next challenging tasks in quantum science. First of all, to understand several physical phenomena starts to visualize, measure, or capture this. On the other hand, quantum measurements cause the quantum mechanical features. Therefore, it is very hard to build up the visualization system on quantum dynamics. Here, we show two different approaches. 

First, we demonstrate the quantum tunnelling dynamics using the trapped collective ions. Using the laser cooling technique, we create the quantum tunnelling rotor and show the interference of the collective micromotions of ions using the Aharonov-Bohm effect. This experiment was done in Urabe group in Osaka university [1]. 

Second, we demonstrate the prototype test of the visualization of the quantum state. we show that the one-to-one correspondence between the streographic projection of the quantum state and the weak value, which is the measurement outcome of the weak measurement. Using the weak measurement with the Laguerre-Gaussian probe beams, the weak value can be visualized. As an example, the visualization of the polarized state can be demonstrated in collaboration with Hirokazu Kobayashi (Kochi Technical University) [2,3].

[1] Nature Commun. 5, 3868 (2014)

[2] Phys. Rev. A 86, 053805 (2012)

[3] Phys. Rev. A 89, 053816 (2014)