The weather was good on the last Sunday, finally. Thanks to my wife, who always finds interesting things to do around, we had a chance to ride a steam locomotive in the region, near the boarder between Germany and the Netherlands (I still find it quite amazing to cross boarder so easily!). The train was …
A new paper published
Last year, I had a chance to perform some calculations by myself, which I truely enjoy. Along the way, I encountered an issue with the anomalous position -- a very important theoretical concept for the gauge-invariant description of response phenomena -- and digged into it. I am gald to share the news that the work …
Vacation in French Alps
May is always a good month. The weather is getting warmer (but it is not too hot), and the nature is turning green. What is also good is that there several bank holidays. Although the amount of working hours is lesser than other month, the productivity isn't low because I get recharged after all the …
Reinvent the wheel (your own wheel)
In recent weeks, I spent time for implementing the surface Green's function method from the paper, M. P. Lopez Sancho, J. M. Lopez Sancho, and J, RubioHighly convergent schemes for the calculation of bulk and surface Green functionsI. Phys. F: Met. Phys. 15 (1985) 851-858 This is a quite well-known method in the field, which …
Spring Walk near Jülich
Today, I discovered a very nice walking trail near Jülich. As the spring has arrived, now everything is becoming green. It still rains from time to time, but I enjoy this weather because it does not get too hot, like in May. The trail was full of nature along the river Rur, and we were …
Berlin + DPG
Only a week after the APS March Meeting, I went to Berlin for the DPG Spring Meeting. The DPG was like the usual. I listened to talks of colleagues in Germany and from neighbor countries, discuss with my collaborators on some new ideas and common projects, and hung out with some of them in the …
APS March Meeting @Minneapolis
This year in March, I joined two mega-conferences; APS (American Physical Societ) March Meeting and DPG (Deutsche Physikalische Gesellschaft) Spring Meeting. The APS took place at Minneapolis in the US, and the DPG took place at Berlin in Germany. For the APS, which was my first time, I had the following impressions: There're a lot …
Can we dream about death?
Recently on YouTube, I watched a very interesting discussion on whether we can dream about one's own death. It was a part of a TV show in Korean, in which several scientists from different areas chat about the topics that everyone on earth might be curious about. Although I felt sometimes the show stretched a …
Snow
Two weeks ago, we had unusually heavy snow in our region. On the 17th, when it started to snow from the afternoon, I was still in the research center, so by the time when I was about to leaving, there was thick snow everywhere in the parking lot. I was hesitating for a while if …
Paris, SPEC CEA Saclay
On the last Thursday (11th January), I visited SPEC (Service de Physique de l'Etat Condensé), CEA Saclay in Paris to meet my colleagues. Before the departure on the 10th, I was a bit worried due to the nationwide strike from the conductors in Deutschebahn in Germany. Fortunately, my train was from Eurostar, not from Deutschebahn, …
Spintronics, Orbitronics, and Physics Beyond 