Lev Davidovich Landau (Russian : Лев Дави́дович Ланда́у; 22 January 1908 – 1 April 1968) was a Soviet physicist who made fundamental contributions to many areas of theoretical physics. [1] [2] [3] He was considered as one of the last scientists who were universally well-versed and made seminal contributions to all branches of physics.
His accomplishments include the independent co-discovery of the density matrix method [4] [5] in quantum mechanics (alongside John von Neumann), the quantum mechanical theory of diamagnetism, the theory of superfluidity, the theory of second-order phase transitions, invention of order parameter technique, [6] the Ginzburg–Landau theory of superconductivity, the theory of Fermi liquids, the explanation of Landau damping in plasma physics, the Landau pole in quantum electrodynamics, the two-component theory of neutrinos, and Landau's equations for S-matrix singularities. [7] He received the 1962 Nobel Prize in Physics for his development of a mathematical theory of superfluidity that accounts for the properties of liquid helium II at a temperature below 2.17 K (−270.98 °C ). [8]
Landau was born on 22 January 1908 to Jewish parents [8] [9] [10] [11] in Baku, the Russian Empire, in what is now Azerbaijan. Landau's father, David Lvovich Landau, was an engineer with the local oil industry, and his mother, Lyubov Veniaminovna Garkavi-Landau, was a doctor. Both came to Baku from Mogilev and both graduated the Mogilev gymnasium. [12] [13] He learned differential calculus at age 12 and integral calculus at age 13. Landau graduated in 1920 at age 13 from gymnasium. His parents considered him too young to attend university, so for a year he attended the Baku Economical Technical School. In 1922, at age 14, he matriculated at the Baku State University, studying in two departments simultaneously: the Departments of Physics and Mathematics, and the Department of Chemistry. Subsequently, he ceased studying chemistry, but remained interested in the field throughout his life.
In 1924, he moved to the main centre of Soviet physics at the time: the Physics Department of Leningrad State University, where he dedicated himself to the study of theoretical physics, graduating in 1927. Landau subsequently enrolled for post-graduate studies at the Leningrad Physico-Technical Institute where he eventually received a doctorate in Physical and Mathematical Sciences in 1934. [14] Landau got his first chance to travel abroad during the period 1929–1931, on a Soviet government—People's Commissariat for Education—travelling fellowship supplemented by a Rockefeller Foundation fellowship. By that time he was fluent in German and French and could communicate in English. [15] He later improved his English and learned Danish. [16]
After brief stays in Göttingen and Leipzig, he went to Copenhagen on 8 April 1930 to work at the Niels Bohr's Institute for Theoretical Physics. He stayed there until 3 May of the same year. After the visit, Landau always considered himself a pupil of Niels Bohr and Landau's approach to physics was greatly influenced by Bohr. After his stay in Copenhagen, he visited Cambridge (mid-1930), where he worked with Paul Dirac, [17] Copenhagen (September to November 1930), [18] and Zürich (December 1930 to January 1931), where he worked with Wolfgang Pauli. [17] From Zürich Landau went back to Copenhagen for the third time [19] and stayed there from 25 February until 19 March 1931 before returning to Leningrad the same year. [20]
Between 1932 and 1937, Landau headed the Department of Theoretical Physics at the National Scientific Center Kharkiv Institute of Physics and Technology, and he lectured at the University of Kharkiv and the Kharkiv Polytechnic Institute. Apart from his theoretical accomplishments, Landau was the principal founder of a great tradition of theoretical physics in Kharkiv, Ukraine, sometimes referred to as the "Landau school". In Kharkiv, he and his friend and former student, Evgeny Lifshitz, began writing the Course of Theoretical Physics , ten volumes that together span the whole of the subject and are still widely used as graduate-level physics texts. During the Great Purge, Landau was investigated within the UPTI Affair in Kharkiv, but he managed to leave for Moscow to take up a new post. [3]
Landau developed a famous comprehensive exam called the "Theoretical Minimum" which students were expected to pass before admission to the school. The exam covered all aspects of theoretical physics, and between 1934 and 1961 only 43 candidates passed, but those who did later became quite notable theoretical physicists. [21] [22]
In 1932, Landau computed the Chandrasekhar limit; [23] however, he did not apply it to white dwarf stars. [24]
From 1937 until 1962, Landau was the head of the Theoretical Division at the Institute for Physical Problems. [25]
On 27 April 1938, Landau was arrested for a leaflet which compared Stalinism to German Nazism and Italian Fascism. [3] [26] He was held in the NKVD's Lubyanka prison until his release, on 29 April 1939, after Pyotr Kapitsa (an experimental low-temperature physicist and the founder and head of the institute) and Bohr wrote letters to Joseph Stalin. [27] [28] Kapitsa personally vouched for Landau's behaviour and threatened to quit the institute if Landau was not released. [29] After his release, Landau discovered how to explain Kapitsa's superfluidity using sound waves, or phonons, and a new excitation called a roton. [3]
Landau led a team of mathematicians supporting Soviet atomic and hydrogen bomb development. He calculated the dynamics of the first Soviet thermonuclear bomb, including predicting the yield. For this work Landau received the Stalin Prize in 1949 and 1953, and was awarded the title "Hero of Socialist Labour" in 1954. [3]
Landau's students included Lev Pitaevskii, Alexei Abrikosov, Aleksandr Akhiezer, Igor Dzyaloshinskii, Evgeny Lifshitz, Lev Gor'kov, Isaak Khalatnikov, Roald Sagdeev and Isaak Pomeranchuk.
Landau's accomplishments include the independent co-discovery of the density matrix method in quantum mechanics (alongside John von Neumann), the quantum mechanical theory of diamagnetism, the theory of superfluidity, the theory of second-order phase transitions, the Ginzburg–Landau theory of superconductivity, the theory of Fermi liquids, the explanation of Landau damping in plasma physics, the Landau pole in quantum electrodynamics, the two-component theory of neutrinos, the explanation of flame instability (the Darrieus-Landau instability), and Landau's equations for S matrix singularities.
Landau received the 1962 Nobel Prize in Physics for his development of a mathematical theory of superfluidity that accounts for the properties of liquid helium II at a temperature below 2.17 K (−270.98 °C)." [30]
In 1937, Landau married Kora T. Drobanzeva from Kharkiv. [31] Their son Igor (1946–2011) became a theoretical physicist. Lev Landau believed in "free love" rather than monogamy and encouraged his wife and his students to practise "free love". However, his wife was not enthusiastic. [3]
Landau is generally described as an atheist, [32] [33] [34] although when Soviet filmmaker Andrei Tarkovsky asked Landau whether he believed in the existence of God, Landau pondered the matter in silence for three minutes before responding, "I think so." [35] In 1957, a lengthy report to the CPSU Central Committee by the KGB recorded Landau's views on the 1956 Hungarian Uprising, Vladimir Lenin and what he termed "red fascism". [36] Hendrik Casimir recalls him as a passionate communist, emboldened by his revolutionary ideology. Landau's drive in establishing Soviet science was in part due to his devotion to socialism. In 1935 he published a piece titled “Bourgeoisie and Contemporary Physics” in the Soviet newspaper Izvestia in which he criticized religious superstition and the dominance of capital, which he saw as bourgeois tendencies, citing “unprecedented opportunities for the development of physics in our country, provided by the Party and the government.” [3]
On 7 January 1962, Landau's car collided with an oncoming truck. He was severely injured and spent two months in a coma. Although Landau recovered in many ways, his scientific creativity was destroyed, [25] and he never returned fully to scientific work. His injuries prevented him from accepting the 1962 Nobel Prize in Physics in person. [37]
Throughout his life Landau was known for his sharp humour, as illustrated by the following dialogue with a psychologist, Alexander Luria, who tried to test for possible brain damage while Landau was recovering from the car crash: [16] [38]
In 1965 former students and co-workers of Landau founded the Landau Institute for Theoretical Physics, located in the town of Chernogolovka near Moscow, and led for the following three decades by Isaak Khalatnikov.
In June 1965, Lev Landau and Evsei Liberman published a letter in the New York Times, stating that as Soviet Jews they opposed U.S. intervention on behalf of the Student Struggle for Soviet Jewry. [39] However, there are doubts that Landau authored this letter. [40]
Landau died on 1 April 1968, aged 60, from complications of the injuries sustained in the car accident six years earlier. He was buried at the Novodevichy Cemetery. [41]
Two celestial objects are named in his honour:
The highest prize in theoretical physics awarded by the Russian Academy of Sciences is named in his honour:
On 22 January 2019, Google celebrated what would have been Landau's 111th birthday with a Google Doodle. [43]
The Landau-Spitzer Award (American Physical Society), which recognizes outstanding contributions to plasma physics and European-United States collaboration, is named in-part in his honor. [44]
Landau kept a list of names of physicists which he ranked on a logarithmic scale of productivity ranging from 0 to 5. [45] [46] The highest ranking, 0, was assigned to Isaac Newton. Albert Einstein was ranked 0.5. A rank of 1 was awarded to the founding fathers of quantum mechanics, Niels Bohr, Werner Heisenberg, Satyendra Nath Bose, Paul Dirac and Erwin Schrödinger, and others, while members of rank of 5 were deemed "pathologists". [47] Landau ranked himself as a 2.5 but later promoted to a 2. N. David Mermin, writing about Landau, referred to the scale, and ranked himself in the fourth division, in the article "My Life with Landau: Homage of a 4.5 to a 2". [48] [46] [49]
Landau wrote his first paper On the derivation of Klein–Fock equation , co-authored with Dmitri Ivanenko in 1926, when he was 18 years old. His last paper titled Fundamental problems appeared in 1960 in an edited version of tributes to Wolfgang Pauli. A complete list of Landau's works appeared in 1998 in the Russian journal Physics-Uspekhi. [53] Landau would allow himself to be listed as a co-author of a journal article on two conditions: 1) he brought up the idea of the work, partly or entirely, and 2) he performed at least some calculations presented in the article. Consequently, he removed his name from numerous publications of his students where his contribution was less significant. [50]
Landau and Lifshitz suggested in the third volume of the Course of Theoretical Physics that the then-standard periodic table had a mistake in it, and that lutetium should be regarded as a d-block rather than an f-block element. Their suggestion was fully vindicated by later findings, [54] [55] [56] [57] and in 1988 was endorsed by a report of the International Union of Pure and Applied Chemistry (IUPAC). [58]
Vitaly Lazarevich Ginzburg, ForMemRS was a Russian physicist who was honored with the Nobel Prize in Physics in 2003, together with Alexei Abrikosov and Anthony Leggett for their "pioneering contributions to the theory of superconductors and superfluids."
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Evgeny Mikhailovich Lifshitz was a leading Soviet physicist and brother of the physicist Ilya Lifshitz.
In theoretical physics and applied mathematics, a field equation is a partial differential equation which determines the dynamics of a physical field, specifically the time evolution and spatial distribution of the field. The solutions to the equation are mathematical functions which correspond directly to the field, as functions of time and space. Since the field equation is a partial differential equation, there are families of solutions which represent a variety of physical possibilities. Usually, there is not just a single equation, but a set of coupled equations which must be solved simultaneously. Field equations are not ordinary differential equations since a field depends on space and time, which requires at least two variables.
Isaak Markovich Khalatnikov was a leading Soviet theoretical physicist who made significant contributions to many areas of theoretical physics, including general relativity, quantum field theory, as well as the theory of quantum liquids. He is well known for his role in developing the Landau-Khalatnikov theory of superfluidity and the so-called BKL conjecture in the general theory of relativity.
Dmitri Dmitrievich Ivanenko was a Soviet theoretical physicist of Ukrainian origin who made great contributions to the physical science of the twentieth century, especially to nuclear physics, field theory, and gravitation theory. He worked in the Poltava Gravimetric Observatory of the Institute of Geophysics of NAS of Ukraine, was the head of the Theoretical Department Ukrainian Physico-Technical Institute in Kharkiv, Head of the Department of Theoretical Physics of the Kharkiv Institute of Mechanical Engineering. Professor of University of Kharkiv, Professor of Moscow State University.
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In physics, the Landau–Lifshitz–Gilbert equation, named for Lev Landau, Evgeny Lifshitz, and T. L. Gilbert, is a name used for a differential equation describing the dynamics of magnetization M in a solid. It is a modified version by Gilbert of the original equation of Landau and Lifshitz. The LLG equation is similar to the Bloch equation, but they differ in the form of the damping term. The LLG equation describes a more general scenario of magnetization dynamics beyond the simple Larmor precession. In particular, the effective field driving the precessional motion of M is not restricted to real magnetic fields; it incorporates a wide range of mechanisms including magnetic anisotropy, exchange interaction, and so on.
The Kharkiv Theoretical Physics School was founded by Lev Landau in Kharkov, Soviet Union and further developed by Oleksandr Akhiezer and Ilya Lifshitz, following Landau's flight to the Kapitza’s Institute for Physical Problems in Moscow in 1937 in an attempt to avoid an arrest during the UPTI Affair.
Aleksandr Ilyich Akhiezer was a Soviet and Ukrainian theoretical physicist, known for contributions to numerous branches of theoretical physics, including quantum electrodynamics, nuclear physics, solid state physics, quantum field theory, and the theory of plasma. He was the brother of the mathematician Naum Akhiezer.
The Course of Theoretical Physics is a ten-volume series of books covering theoretical physics that was initiated by Lev Landau and written in collaboration with his student Evgeny Lifshitz starting in the late 1930s.
The National Science Center Kharkiv Institute of Physics and Technology (KIPT) (Ukrainian: Національний науковий центр «Харківський фізико-технічний інститут»), formerly the Ukrainian Physics and Technology Institute (UPTI) is the oldest and largest physical science research centre in Ukraine. Today it is known as a science center as it consists of several institutes that are part of the Kharkiv Institute of Physics and Technology science complex.
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Lev Petrovich Pitaevskii was a Russian theoretical physicist, who made contributions to the theory of quantum mechanics, electrodynamics, low-temperature physics, plasma physics, and condensed matter physics. Together with his PhD supervisor Evgeny Lifshitz and with Vladimir Berestetskii, he was also the co-author of a few volumes of the influential Landau–Lifschitz Course of Theoretical Physics series. His academic status was professor.
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The Landau Gold Medal is the highest award in theoretical physics awarded by the Russian Academy of Sciences and its predecessor the Soviet Academy of Sciences. It was established in 1971 and is named after Soviet physicist and Nobel Laureate Lev Landau. When awarded by the Soviet Academy of Sciences the award was the "Landau Prize"; the name was changed to the "Landau Gold Medal" in 1992.
Mark Yakovlevich Azbel was a Soviet and Israeli physicist. He was a member of the American Physical Society.
Igor Ekhielevich Dzyaloshinskii, was a Russian theoretical physicist, known for his research on "magnetism, multiferroics, one-dimensional conductors, liquid crystals, van der Waals forces, and applications of methods of quantum field theory". In particular he is known for the Dzyaloshinskii-Moriya interaction.
Landau, Lev Davydovich (1908-68), a brilliant Soviet theoretical physicist, who was born into a Jewish family in Baku and graduated from Leningrad State University in 1927.
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(help)I present here two examples of notable atheists. The first is Lev Landau, the most brilliant Soviet physicist of the twentieth century.
Landau's theoretical minimum exam was famous and only about forty students passed it in his time. This was Landau's entry-level exam for theoretical physics. It contained what Landau felt was necessary to work in that field. Like many Soviet era physicists he was an atheist.