In Memory of Akira Tonomura : Physicist and Electron by Kazuo Fujikawa, Yoshimasa A Ono

By Kazuo Fujikawa, Yoshimasa A Ono

This memorial quantity in honor of Dr Akira Tonomura is to commemorate his huge, immense contributions to primary physics as well as the elemental know-how of electron microscopy. Dr Tonomura kicked the bucket on may perhaps 2, 2012 on the age of 70. He was once Fellow of Hitachi, Ltd., workforce Director of unmarried Quantum Dynamics learn staff of RIKEN, vital Investigator of the 1st Tonomura venture, and Professor of Okinawa Institute of technological know-how and expertise Graduate college.

The publication includes: 1) contributions from amazing physicists, who participated within the "Tonomura FIRST foreign Symposium on Electron Microscopy and Gauge Fields" deliberate via Tonomura himself and held in Tokyo on might 9-10, 2012, and a pair of) reprints of key papers by way of Tonomura and his group. Invited audio system at this Symposium comprise Chen Ning Yang and different unique physicists similar to Yakir Aharonov, Gordon Baym, Christian Colliex, Anthony J Leggett, Naoto Nagaosa, Nobuyuki Osakabe and Masahito Ueda. This "memorial" Symposium was once initially deliberate to commemorate the beginning of the Japanese-government-sponsored FIRST Tonomura venture to build the 1.2 MV holography electron microscope in a position to staring at quantum phenomena within the microscopic global. furthermore, the publication comprises contributions from individuals of the prior ISQM-Tokyo symposia held at Hitachi and from Tonomura's longtime buddies, together with Michael Berry, Jerome Friedman, Hidetoshi Fukuyama, Joseph Imry, Yoshinori Tokura, Jaw-Shen Tsai, and Anton Zeilinger.

The co-editors are Kazuo Fujikawa, Tonomura's longtime buddy, and Yoshimasa A Ono who's Tonomura's affiliate at Hitachi complicated examine Laboratory and now within the FIRST Tonomura undertaking.

Readership: Graduate scholars and researchers in physics, fabrics technology and comparable fields.

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Extra resources for In Memory of Akira Tonomura : Physicist and Electron Microscopist

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If the flux is totally confined, then outside of the confinement, there is no E, no H. So the two paths of electron, starting from A to B, would not be subject to electromagnetic influences according to the traditional view. And so the image at B should not be dependent on the total flux inside of the solenoid. But Aharonov and Bohm in 1959 said the image at B should be dependent on the total flux. The Aharonov-Bohm’s proposal of 1959 was hotly debated. I remember I was in the Institute in Princeton at the time, and there were heated debates.

Fukuhara, and K. Ohbayashi, Electron counting theory, Phys. Lett. A162, 442-448, (1992). 23. K. Harada, T. Matsuda, J. Bonevich, M. Igarashi, S. Kondo, G. Pozzi, U. Kawabe, and A. Tonomura, Real-time observation of vortex lattices in a superconductor by electron microscopy, Nature 360(6399), 51-53, (1992). 24. For details of Tonomura’s electron microscopy experiments on vortex motions in superconductors, see K. Harada, N. Osakabe, and Y. A. Ono, Electron microscopy study on magnetic flux lines in superconductors: Memorial to Akira Tonomura, IEEE Trans.

Because the flux in a superconductor is quantized (in units of h/2e), the experiment did not test the general AB effect, for which the flux is arbitrary; but it did demonstrate the important special case where the AB phase shift is  – as well as providing direct evidence of the value of the flux quantum (if this had been h/e there would have been no effect). Even with a superconductor there is always some penetration of the electrons, so the flux cannot “completely shielded” as claimed in the title of Tonomura’s paper.

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