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Quantum magnets in motion

The Kardar-Parisi-Zhang universality combines classical everyday phenomena such as coffee stains with quantum mechanical spin chains in a surprising way. Credit: Max Planck Institute of Quantum Optics
The behavior of microscopic quantum magnets has long been a subject taught in lectures in theoretical physics. However, investigating the dynamics of systems that are far out of equilibrium and watching them “live” has been difficult so far. Now, researchers at the Max Planck Institute of Quantum Optics in Garching have accomplished precisely this, using a quantum gas microscope. With this tool, quantum systems can be manipulated and then imaged with such high resolution that even individual atoms are visible. The results of the experiments on linear chains of spins show that the way their orientation propagates corresponds to the so-called Kardar-Parisi-Zhang superdiffusion. This confirms a conjecture that recently emerged from theoretical considerations.

Heart progenitors spontaneously regenerate cardiac muscle via a tight junction ‘honeycomb’ in salamanders

However, investigating the dynamics of systems that are far out of equilibrium and watching them “live” has been difficult so far. Now, researchers at the Max Planck Institute of Quantum Optics in Garching have accomplished precisely this, using a quantum gas microscope. With this tool, quantum systems can be manipulated and then imaged with such high resolution that even individual atoms are visible. The results of the experiments on linear chains of spins show that the way their orientation propagates corresponds to the so-called Kardar-Parisi-Zhang superdiffusion. This confirms a conjecture that recently emerged from theoretical considerations.

Reading

This week I’ve been reading

Alejandro Jodorowsky’s Panic Fables

The Locked Room by Maj Sjöwall, Per Wahlöö with Paul Britten Austin (Translator)

Also

Rotten by John Lydon (Johnny Rotten)

and A Paradise Built in Hell by Rebecca Solnit

Those last two are bit on the back burner while I read the enormous Panic Fables which I must say started as a bit of a slog, as did The locked Room, which is a murder mystery/procedural that was recommended by someone. It was gotten more interesting in the third act, but I don’t think I’ll read any more in the series. The Panic Fables is just plain crazy. A weekly strip done for about 6 years I think–conceptual comics.

Rotten is about John Lydons life, and Paradise is “A startling investigation of what people do in disasters and why it matters.”

Listening is at least half of playing

…a quote from Laurie Anderson’s Norton Lecture No. 1

This echos something Pat Metheny said in an interview I read recently about listening being the most important part of playing music.

Listening is important in life. You need to listen to understand. Sitting an listening is an important zen concept. It is important in art. Listening to your inner thoughts/feelings. Being motivated by music and sounds. New sounds are new experiences.

These are, basically, half formed thoughts while I’m trying to figure out where I’m going with this.

On this day in history

Jewish women and children forcibly removed from a bunker

The Jewish Ghetto Uprising 1943

https://en.wikipedia.org/wiki/Warsaw_Ghetto_Uprising

The Warsaw Ghetto Uprising[a] was the 1943 act of Jewish resistance in the Warsaw Ghetto in German-occupied Poland during World War II to oppose Nazi Germany‘s final effort to transport the remaining ghetto population to Majdanek and Treblinka death camps.

After the Grossaktion Warsaw of summer 1942, in which more than a quarter of a million Jews were deported from the ghetto to Treblinka and murdered, the remaining Jews began to build bunkers and smuggle weapons and explosives into the ghetto. The left-wing Jewish Combat Organization (ŻOB) and right-wing Jewish Military Union (ŻZW) formed and began to train. A small resistance effort to another roundup in January 1943 was partially successful and spurred Polish resistance groups to support the Jews in earnest.

The uprising started on 19 April when the ghetto refused to surrender to the police commander SS-Brigadeführer Jürgen Stroop, who ordered the burning of the ghetto, block by block, ending on 16 May. A total of 13,000 Jews were killed, about half of them burnt alive or suffocated. German casualties were probably fewer than 150,[citation needed] with Stroop reporting 110 casualties [16 killed + 1 dead/93 wounded].[4]

It was the largest single revolt by Jews during World War II. The Jews knew that the uprising was doomed and their survival was unlikely. Marek Edelman, the only surviving ŻOB commander, said their inspiration to fight was “not to allow the Germans alone to pick the time and place of our deaths”. According to the United States Holocaust Memorial Museum, the uprising was “one of the most significant occurrences in the history of the Jewish people”.[6]

And, of course, the American Revolution started on this date, with battles in Concord, Lexington, and Menotomy, Massachussets in 1775.

https://en.wikipedia.org/wiki/American_Revolutionary_War