Lecture

First M87 Event Horizon Telescope Results: The Shadow of the Supermassive Black Hole

May 24 (Fri) 14:00 - 15:00, 2019

Yosuke Mizuno (Frankfurt University, Germany)

The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. These images show a prominent ring with a diameter of ~40 micro-arcsecond, consistent with the size and shape of the lensed photon orbit encircling the “shadow” of a supermassive black hole. The ring is persistent across four observing nights and shows enhanced brightness in the south. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data. To this end, we construct a large library of models based on general relativistic magnetohydrodynamic simulations and synthetic images produced by general relativistic ray tracing. We compare the observed visibilities with this library and confirm that the asymmetric ring is consistent with earlier predictions of strong gravitational lensing of synchrotron emission from a hot plasma orbiting near the black hole event horizon. Overall, the observed image is consistent with expectations for the shadow of a spinning Kerr black hole as predicted by general relativity. If the black hole spin and M87’s large scale jet are aligned, then the black hole spin vector is pointed away from Earth. Models in our library of non-spinning black holes are inconsistent with the observations as they do not produce sufficiently powerful jets. We also briefly discuss the possibility of the alternatives to a black hole for the central compact object.

Venue: #435-437, Main Research Building

Event Official Language: English

Introduction to Quantum Computation

May 13 (Mon) - 15 (Wed) 2019

Shunji Matsuura (Fundamental Researcher, Quantum Simulation Division, 1QBit, Canada)

The schedule of the lectures on "Quantum Computation" by Dr. Shunji Matsuura (1QBit) is as follows. May 13 (Mon) [Lecture 1] 10:00-11:30, [Lecture 2] 14:00-15:30 May 14 (Tues) [Lecture 3] 10:00-11:30, [Lecture 4] 14:00-15:30 May 15 (Wed) [Lecture 5] 10:00-11:30, [Lecture 6] 14:00-15:30

Venue: Nishina Hall

Event Official Language: English

AI Smart Robot Network

March 22 (Fri) 15:00 - 17:00, 2019

Yoshihiro Ohta (The University of Tokyo / Arithmer Inc.)

Arithmer Inc. is a startup company providing with business solutions in the field of AI / machine learning / robotics, which emerged from Mathematical Science Dep., Univ. of Tokyo. I will present our recent success stories and ambitious attempts in which applied mathematics is fully utilized, such as optical character recognition, automatic artificial tooth design, scoring driver's skill from movie, and image measurement of human body.

Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria)

Broadcast:R311, Computational Science Research Building

Event Official Language: Japanese

Universal clusters and Efimov physics

January 8 (Tue) 10:30 - 17:00, 2019

Pascal Naidon (Senior Research Scientist, Quantum Hadron Physics Laboratory, RIKEN Nishina Center for Accelerator-Based Science (RNC))

Unlike classical systems, quantum few-body systems can be unbound in the presence of short-range attractive forces. Near the critical strength of the forces at which they can become bound (resonant forces), they exhibit universal properties that are independent of the details of the forces. In this lecture, I will explain in detail the universality of systems with resonant short-range forces, in particular the Efimov effect for 3 or more particles. I will also present the universal properties of systems with power-law interaction forces, such as van der Waals forces that are relevant to neutral atoms.

Venue: Brain Science Ikenohata Research Bldg. (3rd floor, C56)

Event Official Language: English

Introduction to Random Matrix Theory 2

September 26 (Wed) 10:00 - 16:30, 2018

Taro Kimura

Venue: #435-437, Main Research Building

Event Official Language: Japanese

Introduction to Random Matrix Theory 1

September 25 (Tue) 10:00 - 16:30, 2018

Taro Kimura

Venue: #435-437, Main Research Building

Event Official Language: Japanese

Advertising way of thinking and suggestions for public relations of fundamental researches -From the case study of B2B communication to the advertising agency’s approach to innovations

March 30 (Fri) 13:30 - 15:00, 2018

The 16th iTHES Academic-Industrial Innovation Lecture

Venue: Okochi Hall

Event Official Language: Japanese

Machinery and business strategy of construction and mining technology

January 15 (Mon) 15:00 - 17:00, 2018

Ichiro Nakamura (Komatsu Ltd.)

The 15th iTHES Academic-Industrial Innovation Lecture

Venue: Okochi Hall

Event Official Language: Japanese

Development of AI Smart Robots and the business model

October 5 (Thu) 16:00 - 17:30, 2017

Yoshihiro Ohta (The University of Tokyo / Mercury Inc.)

The 14th iTHES Academic-Industrial Innovation Lecture

Venue: Okochi Hall

Event Official Language: Japanese

Deep learning primer for physicists and astronomers

May 10 (Wed) 13:30 - 17:30, 2017

Venue: Nishina Hall

Event Official Language: Japanese

Application of Quantum Beam for Eco-tire Development

February 23 (Thu) 15:00 - 17:00, 2017

Hiroyuki Kishimoto (Sumitomo Rubber Industries, Ltd.)

The 13th iTHES Academic-Industrial Innovation Lecture

Venue: Okochi Hall

Event Official Language: Japanese