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Portrait of Lev Landau
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Nobel Prize in Physics · 1962

Lev Landau

He explained why liquid helium flows without friction, and his ideas and textbooks became the working language of condensed-matter physics.

The Nobel citation: “for his pioneering theories for condensed matter, especially liquid helium”
Born
January 22, 1908, Baku, Russian Empire (now Azerbaijan)
Died
April 1, 1968, Moscow, USSR (now Russia)
Affiliation at the time
Academy of Sciences, Russia

Physics prize

1962

Awarded alone.

Age that year

54years

Born in 1908.

Headline credited impact

$28.4–32billion in economic value

Cumulative world semiconductor sales, a proxy for the quantum-based electronics economy. How it was built

Sources cited

26

Fact-checked September 24, 2026.

  • He entered Baku University at 14 and graduated from Leningrad University at 19.
  • Arrested in April 1938 during Stalin's Great Terror, he spent a year in an NKVD prison. The physicist Pyotr Kapitsa's appeals to Soviet leaders got him out.
  • Niels Bohr, Wolfgang Pauli and Werner Heisenberg all nominated him for the Nobel Prize, which he won alone in 1962.
  • Only 43 people passed his famously hard 'theoretical minimum' exams between 1934 and 1961. Seven of his students became full members of the Soviet Academy of Sciences.
  • A car crash in January 1962 left him unconscious for weeks and ended his research. Sweden's ambassador handed him the Nobel Prize in Moscow.

The breakthrough

A quantum theory of superfluid helium and other 'quantum liquids'

Cool helium to about two degrees above absolute zero and it turns strange. In 1937-38 Pyotr Kapitsa, Landau's new boss in Moscow, found that it flows through the narrowest slits with no measurable friction, a state he named superfluidity. A thin film of it can even creep up the wall of a beaker and over the rim. Earlier theorists had tried to explain liquid helium by following its individual atoms, as if it were a thin gas. Landau's 1941 theory instead described the motion of the whole liquid. He treated its smallest disturbances as particles in their own right, which physicists call quasiparticles: phonons, tiny packets of sound, and rotons, linked to swirling motion. Think of a stadium wave: it is easier to follow the wave around the stands than to track every fan who stands up. From the properties of these quasiparticles he could calculate how the liquid behaves. He predicted a 'second sound', a wave of heat rather than pressure, which Moscow experiments confirmed three years later, and neutron experiments in Stockholm from 1957 confirmed his quasiparticles directly. In 1956-58 he built a matching theory for the rare isotope helium-3, whose atoms obey different quantum rules, and predicted yet another wave, 'zero sound'. Presenting the prize, the Swedish physicist Ivar Waller said physicists had generally failed to explain liquids as fully as crystals or thin gases, and called Landau's helium theories a major exception.[1],[2],[3],[6],[7]

“I spent a year in prison and it was clear that I would be unable to live for even another half year.”
Lev Landau, Landau's later written recollection of his 1938-39 imprisonment by the NKVD, in the English translation quoted by the MacTutor biography.[6]

What it meant for humanity

Landau's work did not produce a drug or a machine. Its impact came through understanding, and through the people he trained. His idea that the collective motions of a dense system can be treated as particles spread far beyond helium, to solids, plasmas and liquids, and the physicist Philip Anderson ranked it as perhaps the most productive idea in all of solid-state physics. His 1956 Fermi-liquid theory, which treats the electrons in a metal as particle-like excitations rather than as a simple gas, became the leading framework for the electron theory of metals, and it let his student Lev Pitaevskii predict that helium-3 could become superfluid, which Nobel Prize-winning experiments confirmed in the early 1970s. Several of his ideas later touched technology. The energy steps of electrons in a magnetic field, which Landau worked out in 1930 and which now bear his name, underlie the quantum Hall effect, a precise standard of electrical resistance. The theory of superconductivity he wrote with Vitaly Ginzburg in 1950 was the starting point for Alexei Abrikosov's theory of the type-II superconductors used in MRI magnets and particle accelerators. An extended form of the Landau-Lifshitz equation for moving magnetization is used to model most spin-based devices, such as new magnetic memory chips. His teaching may matter most. The Course of Theoretical Physics, which he conceived and supervised and Evgeny Lifshitz wrote, has trained generations of physicists in many languages. Between 1934 and 1961, 43 people passed his famously hard entrance exams, the 'theoretical minimum'; seven of his students became full members of the Soviet Academy of Sciences and sixteen more became professors. Many were Jewish students whom he helped into doctoral and research posts, even as Soviet institutions turned against Jews.

  • Landau's quasiparticles, the idea that the collective motions of a crowded system behave like particles, became a basic tool for physicists studying solids, liquids and plasmas.[3],[7]
  • Landau levels, the quantized energies of electrons in a magnetic field that he described in 1930, underlie the quantum Hall effect, which is precise enough to serve as a standard of electrical resistance.[3],[19]
  • The 1950 Ginzburg-Landau theory of superconductivity was the starting point for Abrikosov's theory of type-II superconductors, the technically most important kind, used in MRI magnets and particle accelerators.[7],[20]
  • The Course of Theoretical Physics, conceived and supervised by Landau and written by Evgeny Lifshitz, won the 1962 Lenin Prize, was translated into many languages and has trained generations of physicists.[2],[6],[7],[8]
  • Between 1934 and 1961, 43 people passed his 'theoretical minimum' exams. Seven of his students became full members of the Soviet Academy of Sciences and sixteen more became professors.[8]

Impact in numbers

Most of Landau's legacy cannot be counted: the quasiparticle way of thinking that runs through condensed-matter physics, theories of phase transitions, superconductivity and Fermi liquids still in daily use, and a textbook series and school that trained generations of physicists. We record one small ripple claim. His theories of electrons in metals and in magnetic fields are part of the quantum theory of solids on which modern electronics rests, so we credit him 0.2% of cumulative world semiconductor sales, the same whole-outcome range used for Bohr, Einstein, Pauli, Born and Bloch. We make no separate claim for MRI magnets, where Ginzburg-Landau theory explains rather than enables the superconducting wire. We record no numeric harm claim. The Soviet bombs he helped calculate were never used in war, and although about one million people lived in the radiation zone around the Semipalatinsk test site, no reliable casualty total exists and his work touched only the first designs. Those harms are described in words above.

Fundamental scienceEducationTechnologyEconomy

Each number is the laureate’s credited share of a real-world outcome, cumulative to 2025. The whole outcome, the share of credit, and the reasoning are shown so you can check the arithmetic. Outcomes shared with other laureates are counted once on the impact page.

  • Low confidenceRippleModeledEconomy

    Cumulative world semiconductor sales, a proxy for the quantum-based electronics economy

    $28.4–32

    billion in economic value, credited share

    That is 0.2% of $14.2–16 trillion in economic value since 1955.

    How this number was built

    Same whole-outcome range as the Bohr, Einstein, Pauli, Born and Bloch profiles. WSTS semiconductor billings for 1986-2025 sum to $10.28 trillion nominal; converting each year with the Minneapolis Fed CPI table gives about $14.2 trillion in 2024 dollars (low). High ($16T): $14.2T + rough, unsourced allowances of ~$0.5T for pre-1986 chip sales and ~$1T for lasers and other quantum devices outside WSTS = ~$15.7T, rounded up. Share 0.002: Landau's quasiparticle method and Fermi-liquid theory became the standard description of electrons in metals, his 1930 Landau levels underlie the quantum Hall resistance standard, and the Landau-Lifshitz equation models spin-based memory. But band theory (Bloch, 0.005) bears more directly on semiconductors, quantum theory had many authors, and engineering was equally essential. Credited: about $28-32 billion.[7],[19],[21],[22],[23],[24]

    Sources: Physics World (PDF hosted by the Department of History, University of British Columbia); NobelPrize.org (Royal Swedish Academy of Sciences); arXiv (arXiv:1607.04596); World Semiconductor Trade Statistics (WSTS); Federal Reserve Bank of Minneapolis; National Institute of Standards and Technology (Taking Measure blog)

The double edge

Landau's science had one direct military use, and he took part in it. From 1946 to 1953 he did calculations for the Soviet atomic project, for the first Soviet atomic bomb, tested in August 1949, and for the theory of the first Soviet thermonuclear device, tested in August 1953. A study of Soviet archives credits him with an important part in the computations behind the first atomic and hydrogen bomb designs, and he received Stalin Prizes and the title Hero of Socialist Labour for this work. He worked reluctantly. A 1957 KGB report records him saying in 1952 that a reasonable person should stay as far as possible from nuclear work, and he left secret work after Stalin's death. Still, his calculations helped end the American nuclear monopoly and fed the arms race. The Soviet Union set off 456 nuclear explosions at its Semipalatinsk test site in Kazakhstan, and officials estimate that about one million people lived in its zone of radiation impact. Personally, he could be a harsh and sometimes rude critic.

  • Major

    Calculations for the first Soviet atomic and hydrogen bombs

    From 1946 to 1953 Landau and his group did numerical work on the first Soviet atomic bomb (RDS-1) and on the theory of the first Soviet thermonuclear device (RDS-6s). He received Stalin Prizes in 1949 and 1953 and the title Hero of Socialist Labour. Surveillance reports say he did the work unwillingly, partly for protection, and he quit secret projects after Stalin died.[6],[12],[14],[15]

  • Moderate

    Fallout from Soviet nuclear testing

    Both early devices his calculations supported were exploded at the Semipalatinsk test site in Kazakhstan, in 1949 and 1953. The site hosted 456 nuclear explosions over 40 years, and officials estimate about one million people lived in its zone of radiation impact. Landau worked only on the earliest designs.[15],[17],[18],[26]

  • Minor

    A merciless critic

    Colleagues remembered Landau as a fierce and unsparing critic. As a young man in Leningrad he openly ridiculed Abram Joffe, the head of his institute; a historian calls his behavior rude, though his judgment of the physics proved correct.[6],[7]

Against the odds

Landau was born into a Jewish family in 1908, when the Russian Empire still confined most Jews to the Pale of Settlement, a zone of western provinces far from his native Baku. The Provisional Government abolished those laws in 1917, and the loose new Soviet school system let the gifted teenager move fast. His danger came from Stalin's state. As the Great Purge reached Kharkov, Landau left for Moscow early in 1937; months later several colleagues at his old institute were arrested, forced to confess and shot. In April 1938 the NKVD arrested him over an anti-Stalin leaflet he had probably approved. After two months of forced standing he signed a confession, and he later said he could not have survived another six months in prison. Kapitsa's appeals won his release in 1939, but the charge was only cleared in 1990. After the war the regime turned on Jews. The 1948-49 campaign against 'rootless cosmopolitans' targeted mostly Jewish intellectuals, and Boris Ioffe, who passed Landau's exams, recalled being the only Jewish physics graduate of Moscow University that year to get a job in Moscow. During the Doctors' Plot in January 1953, according to a KGB report, Landau told a friend that if not for the Jewish entry in his passport he would drop secret work for pure science. The KGB watched him with informers and listening devices, called his circle Jewish nationalists, and did not let him travel abroad.

  • 1908

    Discrimination

    He was born under tsarist laws that confined most Jews to the Pale of Settlement, with exceptions for groups such as university graduates. The Provisional Government abolished the Pale and all other anti-Jewish laws in 1917, before he reached university age.[11]

  • 1937

    Persecution

    Stalin's purge hit the Ukrainian Physico-Technical Institute in Kharkov, where Landau had led the theory department. He left for Moscow early in 1937. About six months later several of its leading scientists, including Lev Shubnikov, were arrested, made to confess to spying and sabotage, and shot. Some of the forced confessions named Landau.[7],[15]

  • 1938

    Imprisonment

    Arrested in April 1938 over an anti-Stalin May Day leaflet, he spent a year in an NKVD prison, where he was made to stand seven hours a day for two months before signing a confession. Kapitsa's appeals freed him in April 1939; he was formally cleared only in 1990.[6],[7],[8],[15],[16]

  • 1949

    Discrimination

    In the 1949 campaign against 'rootless cosmopolitans', Jews made up more than 70% of the people the press attacked by name in February and March. Boris Ioffe, who passed Landau's exams, recalled being the only Jewish student of Moscow University's physics department to get a Moscow job that year; others were sent far away or found no work.[9],[13]

  • 1953

    Discrimination

    As the antisemitic Doctors' Plot unfolded in January 1953, Landau told a friend, according to a KGB report, that if not for the ethnicity entry in his passport he would give up secret weapons work for pure science.[10],[12]

  • 1957

    Other

    A 1957 KGB report on Landau drew on informers and listening devices in his home. It called his circle of students Jewish anti-Soviet nationalists, noted that his seminar drew mainly Jews, and recorded his frustration at not being allowed to travel abroad.[12]

Jewish background

Both parents JewishDistant from Jewish identity

Both parents were Jewish: David Landau, a petroleum engineer, and Lyubov Garkavi-Landau, a physician who taught science at Baku's Jewish high school. From age eight Lev attended that school, which taught Hebrew and Bible alongside other subjects; he was a mediocre student of Hebrew and Yiddish. As an adult he was a secular Marxist who called himself an internationalist, but the Soviet state recorded him as Jewish. A 1957 KGB report says he privately condemned Israel during the 1956 Suez war, and notes that many of his students were Jewish.[6],[7],[8],[12]

Key dates

  1. January 22, 1908

    Born in Baku, Russian Empire (now Azerbaijan), to a petroleum engineer and a physician.[1],[2],[6]

  2. 1922

    Enters Baku University at 14, studying physics, mathematics and chemistry.[6]

  3. 1927

    Graduates from Leningrad University at 19 and begins research at the Leningrad Physico-Technical Institute.[2],[6]

  4. 1929

    Begins about 18 months of study in Europe, paid for in part by a Rockefeller fellowship; his most important host is Niels Bohr in Copenhagen.[2],[6]

  5. 1930

    Shows that free electrons in a magnetic field have quantized energy levels, now called Landau levels, explaining a new kind of magnetism in metals.[3],[7],[19]

  6. 1932

    Becomes head of the theoretical department at the Ukrainian Physico-Technical Institute in Kharkov.[2]

  7. 1937

    Leaves Kharkov as Stalin's purge closes in and heads theory at Kapitsa's Institute for Physical Problems in Moscow; publishes his theory of phase transitions.[2],[7]

  8. April 1938

    Arrested by the NKVD over an anti-Stalin leaflet; released a year later after Kapitsa vouches for him.[6],[7],[16]

  9. 1941

    Publishes his theory of superfluid helium, built on quasiparticles called phonons and rotons.[1],[7]

  10. 1946

    Elected to the USSR Academy of Sciences; begins calculations for the Soviet atomic project, which continue until 1953.[2],[15]

  11. 1956

    Develops his theory of Fermi liquids (1956-58) for helium-3; the approach later became the standard picture of electrons in metals.[2],[7]

  12. January 7, 1962

    Badly injured in a car crash near Moscow. Specialists and drugs flown in from abroad help save his life, but he never returns to research.[6],[8],[25]

  13. December 10, 1962

    Awarded the Nobel Prize in Physics after nominations from Bohr, Pauli and Heisenberg; too ill to travel, he receives it in Moscow from Sweden's ambassador.[1],[3],[4],[5]

  14. April 1, 1968

    Dies in Moscow at 60, after surgery for an intestinal blockage, never having recovered from the crash.[1],[6]

Sources

  1. 1.Lev Landau - Facts · NobelPrize.org (Nobel Prize Outreach)
  2. 2.Lev Landau - Biographical · NobelPrize.org (from Nobel Lectures, Physics 1942-1962, Elsevier, 1964), 1964
  3. 3.The Nobel Prize in Physics 1962 - Award ceremony speech by Professor I. Waller · NobelPrize.org, 1962
  4. 4.Lev Landau - Banquet speech (delivered by the Soviet ambassador, 10 December 1962) · NobelPrize.org, 1962
  5. 5.Lev Landau - Nominations · NobelPrize.org
  6. 6.Lev Davidovich Landau, by J J O'Connor and E F Robertson · MacTutor History of Mathematics, University of St Andrews
  7. 7.Lev Landau: physicist and revolutionary, by Alexei Kojevnikov (Physics World, June 2002) · Physics World (PDF hosted by the Department of History, University of British Columbia), 2002
  8. 8.Landau, Lev Davidovich, by Mark Azbel' · YIVO Encyclopedia of Jews in Eastern Europe, 2010
  9. 9.Anticosmopolitan Campaign, by Yaacov Ro'i · YIVO Encyclopedia of Jews in Eastern Europe
  10. 10.Doctors' Plot, by Jonathan Brent · YIVO Encyclopedia of Jews in Eastern Europe
  11. 11.Pale of Settlement, by John Klier · YIVO Encyclopedia of Jews in Eastern Europe
  12. 12.19 December 1957: KGB report on Academician Lev Landau (translation by Mark Chulsky, annotated) · The Bukovsky Archives, 1957
  13. 13.Landau's Theoretical Minimum, Landau's Seminar, ITEP in the Beginning of the 1950's, by Boris L. Ioffe · arXiv (arXiv:hep-ph/0204295), 2002
  14. 14.L D Landau in the Soviet Atomic Project: a documentary study, by G. V. Kiselev (Phys. Usp. 51, 911-954) · Physics-Uspekhi, 2008
  15. 15.Lev Davidovich Landau · GlobalSecurity.org, 2019
  16. 16.Lev Landau (Date in History: 22 January 1908) · Physics Today (American Institute of Physics), 2016
  17. 17.Soviet Hydrogen Bomb Program · Atomic Heritage Foundation / National Museum of Nuclear Science & History, 2014
  18. 18.UN News special report: 'Ground Zero' at the former Semipalatinsk nuclear test site in Kazakhstan · UN News (United Nations), 2019
  19. 19.Press release: The 1985 Nobel Prize in Physics (Klaus von Klitzing, quantized Hall effect) · NobelPrize.org (Royal Swedish Academy of Sciences), 1985
  20. 20.Press release: The 2003 Nobel Prize in Physics (Abrikosov, Ginzburg, Leggett) · NobelPrize.org (Royal Swedish Academy of Sciences), 2003
  21. 21.Solving the stochastic Landau-Lifshitz-Gilbert-Slonczewski equation for monodomain nanomagnets: A survey and analysis of numerical techniques, by S. Ament, N. Rangarajan, A. Parthasarathy and S. Rakheja (New York University) · arXiv (arXiv:1607.04596), 2017
  22. 22.Historical Billings Report (WSTS Blue Book monthly data, 1986 to date) · World Semiconductor Trade Statistics (WSTS), 2026
  23. 23.Consumer Price Index, 1913- · Federal Reserve Bank of Minneapolis
  24. 24.A Quantum Leap Forward: How Tiny Particles Can Bring Us Exciting New Tech, by Corey Stambaugh · National Institute of Standards and Technology (Taking Measure blog), 2025
  25. 25.Lev Landau, Topmost Soviet Jewish Scientist, Wins Nobel Prize · Jewish Telegraphic Agency (Daily Bulletin, 2 November 1962), 1962
  26. 26.Soviet Atomic Program - 1946 · Atomic Heritage Foundation / National Museum of Nuclear Science & History

Fact-checked on September 24, 2026 by a separate AI fact-checking pass that re-opened the sources, with 11 corrections made. How we check

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