Tag Archives: Quantum Physics

Jews of the Week: Edmund Landau and Lev Landau

Two Math Wizards

Edmund Landau

Edmund Georg Hermann Landau (1877-1938) was born in Berlin. As a young boy, he was recognized as a math prodigy, and earned his Ph.D from the University of Berlin by 22. He immediately received a teaching position at the university, where he taught for the next ten years. Meanwhile, Landau married the daughter of Nobel Prize winner (and past Jew of the Week) Paul Ehrlich. In 1812, Landau presented four complex math problems at the International Congress of Mathematicians. The problems remain unsolved to this day. After over a decade teaching at the University of Göttingen, Landau joined the new Hebrew University. He was a co-founder of its math department, and played a key role in the construction of its Mathematics Institute. He taught himself Hebrew so that he could present a novel math lecture at the University’s grand opening in 1925. Two years later, Landau and his family made aliyah. He taught at the Hebrew University for several years before returning to Göttingen. After being removed from his position by the Nazis, Landau settled back in Berlin and occasionally traveled outside Germany to teach. He died four years later. Landau is renowned for his work on distribution of prime numbers, and on what is now called Landau Prime Ideal Theorem. It was once said that “no one was ever more passionately devoted to mathematics than Landau.”

Lev Landau

Edmund Landau is not to be confused with another Jewish math prodigy, Lev Davidovich Landau (1908-1968). Born in Azerbaijan (then part of Russia), Lev Landau started university at 13, published his first paper at 18, and got his PhD in math by 26. He received a scholarship from the Soviet government as well as the Rockefeller Foundation to travel and study abroad. He was soon fluent in German, French, Danish, and English. Much of his time was spent working in the lab of Nobel Prize winner (and past Jew of the Week) Niels Bohr. After returning to the Soviet Union, Landau was put at the head of the physics department at Kharkiv Institute of Physics and Technology. He taught at the University of Kharkiv, and at the same time worked with his student Evgeny Lifshitz on a ten-volume textbook. The Course of Theoretical Physics is still one of the most popular graduate physics textbooks used today. In 1938, Landau was arrested for comparing Stalin to the Nazis. After the intervention of other physicists, he was freed. Ironically, he won the Stalin Prize in 1949 and again in 1953, for his work on building the first Soviet nuclear bomb. Landau is famous for, among many other things, his theory of superconductivity, theory of Fermi liquid, for plasma physics, quantum electrodynamics, and most of all for his theory of superfluidity, which won him a Nobel Prize in 1962. Unfortunately, he couldn’t personally collect the prize because he was in a severe car accident and spent two months in a coma. He ultimately died from his injuries in 1968. Several years before this, his students established the Landau Institute for Theoretical Physics near Moscow. It is still one of the most prestigious physics labs in Russia. Landau was featured in the latest Google Doodle. There is a crater on the moon named after him.

The Torah: A Comprehensive Overview

Words of the Week

Both religion and science require a belief in God. For believers, God is in the beginning, and for physicists He is at the end of all considerations… To the former He is the foundation, to the latter, the crown of the edifice of every generalized world view.
– Max Planck

Google Doodle for January 22, 2019, the birthday of Lev Landau.

Jew of the Week: Richard Feynman

Revolutionary Physicist

Richard Phillips Feynman (1918-1988) was born in Queens to Lithuanian Jewish immigrant parents. Before his birth, his father had decided that his son should be a scientist, and raised Feynman from an early age to question everything. Feynman did not speak his first word until he was three years old. In childhood, he loved to take things apart and even set up a lab in his home, hiring his little sister for 4 cents a week to be his assistant. (He would later inspire and encourage her to become a renowned astrophysicist in her own right.) At 15, he taught himself advanced algebra, calculus, and trigonometry. He applied to Columbia University but was rejected because the quota for Jewish students had been filled. Feynman went to MIT instead, first majoring in math, then electrical engineering, and finally physics. He published his first two papers as an undergrad, and his senior thesis (putting forth what would become the Hellmann-Feynman theorem) brought him a great deal of recognition in the scientific community. Feynman then applied to grad school at Princeton, and got an unprecedented perfect score on the physics exam. Again, he was initially brushed aside for being Jewish before the dean was convinced not to miss out on the young genius. (Feynman was admitted only on the condition that he wouldn’t get married!) At 23, he defended his Ph.D, and was already being compared to Einstein (he would win the Albert Einstein Award in 1954). Meanwhile, Feynman was working on the Manhattan Project, leading a team developing the isotron (to isolate uranium-235), then developing what’s now called the Bethe-Feynman formula for fission bomb yield. At Los Alamos, he was one of the “human computers”, and helped to develop better machinery for some of the world’s first digital computers. Towards the end, he spent time lecturing on the dangers of nuclear power, and put together a safety manual for uranium enrichment.

After the war, Feynman joined the faculty of Cornell University, and there developed his famous (and revolutionary) “Feynman diagrams” to solve and explain quantum problems more easily. After a sabbatical in Brazil, Feynman moved to Caltech, working on superconductivity, superfluidity, nuclear decay, and quantum gravity, among many other subjects. He is credited with being the first scientist to conceive of both nanotechnology and quantum computers. In the 1960s, he began writing books on physics, many of which went on to become bestsellers and university textbooks. In 1965, he won a Nobel Prize for his theory on quantum electrodynamics, and in 1979 won the National Medal of Science. Feynman became even more famous in 1986 when he lead the team that investigated the crash of the space shuttle Challenger. Feynman was voted by scientists as one of the 10 Greatest Physicists of All Time, and Bill Gates recently wrote an article (titled “The Best Teacher I Never Had”) about how it was Feynman that served as his greatest inspiration. Feynman was famous for his sense of humour and his rebellious nature. He rejected his religion (though at a later age encountered the Talmud and said it was “a wonderful book”), resisted his superiors (he was sought out by Niels Bohr because all the other physicists were too fearful to argue with the great Bohr), and even derided his Nobel Prize (saying the real prize was the scientific discovery). Feynman also loved biology and poetry, and was an avid painter and musician. Last Friday would have been his one hundredth birthday.

Words of the Week

As they set out from their place above, each soul is male and female as one. Only as they descend to this world do they part, each to its own side. And then it is the One Above who unites them again. This is His exclusive domain, for He alone knows which soul belongs to which and how they must reunite.

– Zohar (I, 85b)

Jew of the Week: Vera Rubin

Vera Rubin at the Lowell Observatory (Credit: Carnegie Institution)

Vera Cooper (1928-2016) was born in Philadelphia. Her parents were Jewish immigrants from Eastern Europe (who changed their last name from Kobchefski to Cooper). From the young age of just 10, Cooper was interested in astronomy, and was later the only woman studying the subject in her college. She intended to continue graduate studies at Princeton but was forbidden because of her gender. Cooper went to Cornell University instead and studied astrophysics and quantum physics. There she also met her husband, Robert Rubin, who was pursuing graduate studies in chemistry. The two had four children, all of whom became Ph.D scientists and mathematicians. Rubin completed her Master’s in 1951 and went to Georgetown University for her doctorate. Around this time, she discovered that whole galaxies are rotating around their centres – an idea so revolutionary that it was initially rejected. Her 1954 Ph.D thesis was similarly revolutionary, showing that galaxies must be clumped in clusters. No one paid attention to this work for another two decades, when it was confirmed to be true. In 1965, Rubin was the first woman allowed to use Caltech’s famous Palomar Observatory. She then became a Senior Fellow at Washington’s Carnegie Institution, where her research was focused on “galactic and extragalactic dynamics”, among other things. Rubin made critical calculations with regards to galactic rotation rates, and together with her friend Robert Ford, discovered what is now known as the Rubin-Ford effect. In her studies, she found that galaxies are spinning so fast that they should be flying apart. They do not fly apart because gravity keeps them together. But, there is not enough visible matter in galaxies to generate so much gravity! This led Rubin to confirm the existence of invisible dark matter. This was perhaps her biggest breakthrough, and completely transformed astrophysics. For her tremendous achievements, Rubin has won multiple awards, including the National Medal of Science and the Royal Astronomical Society’s prestigious Gold Medal. There is also an asteroid named after her. Sadly, Rubin passed away earlier this week. Despite being 88 years old, Rubin continued her scientific research (focusing on the motion of distant stars) until the last days of her life. She was a pioneer for women in science, and worked tirelessly to get more women elected to the National Academy of Sciences. Rubin was proud of her Jewish heritage, and often spoke of the beauty and value of science and religion when studied together. In addition to half a dozen important scientific publications, Rubin wrote a book, and was featured in two documentaries. She was once described as an American “national treasure”.

Words of the Week

The first gulp from the glass of natural sciences will turn you into an atheist, but at the bottom of the glass God is waiting for you.
– Werner Heisenberg, Nobel Prize-winning physicist