Isaak Markovich Khalatnikov

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Isaak Markovich Khalatnikov (Russian : Исаак Маркович Халатников; born 17 October 1919) is a Soviet-born physicist known for his role in developing the BKL conjecture in general relativity.

Russian language East Slavic language

Russian is an East Slavic language, which is official in the Russian Federation, Belarus, Kazakhstan and Kyrgyzstan, as well as being widely used throughout Eastern Europe, the Baltic states, the Caucasus and Central Asia. It was the de facto language of the Soviet Union until its dissolution on 25 December 1991. Although, nowadays, nearly three decades after the breakup of the Soviet Union, Russian is used in official capacity or in public life in all the post-Soviet nation-states, as well as in Israel and Mongolia, the rise of state-specific varieties of this language tends to be strongly denied in Russia, in line with the Russian World ideology.

Soviet Union 1922–1991 country in Europe and Asia

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a socialist state in Eurasia that existed from 30 December 1922 to 26 December 1991. Nominally a union of multiple national Soviet republics, its government and economy were highly centralized. The country was a one-party state, governed by the Communist Party with Moscow as its capital in its largest republic, the Russian Soviet Federative Socialist Republic. Other major urban centres were Leningrad, Kiev, Minsk, Alma-Ata, and Novosibirsk.

Physicist scientist who does research in physics

A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate causes of phenomena, and usually frame their understanding in mathematical terms. Physicists work across a wide range of research fields, spanning all length scales: from sub-atomic and particle physics, through biological physics, to cosmological length scales encompassing the universe as a whole. The field generally includes two types of physicists: experimental physicists who specialize in the observation of physical phenomena and the analysis of experiments, and theoretical physicists who specialize in mathematical modeling of physical systems to rationalize, explain and predict natural phenomena. Physicists can apply their knowledge towards solving practical problems or to developing new technologies.

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Life and career

Khalatnikov was born into a Jewish family in Dnipropetrovsk and graduated from Dnipropetrovsk State University with a degree in Physics in 1941. He had been a member of the Communist Party since 1944. He earned his doctorate in 1952. His wife Valentina was the daughter of Revolutionary hero Nikolay Shchors.

Communist Party of the Soviet Union political party founded in 1912

The Communist Party of the Soviet Union (CPSU) was the founding and ruling political party of the Soviet Union. The CPSU was the sole governing party of the Soviet Union until 1990, when the Congress of People's Deputies modified Article 6 of the most recent 1977 Soviet constitution, which had granted the CPSU a monopoly over the political system.

Nikolay Shchors Soviet general

Mykola Oleksandrovich Shchors was a Red Army commander, member of the Russian Communist Party, renowned for his personal courage during the Russian Civil War and sometimes being called the Ukrainian Chapayev. In 1918–1919 he fought against the new established Ukrainian government of the Ukrainian People's Republic. Later he commanded the Bohunsky regiment, brigade, 1st Soviet Ukrainian division and 44th rifle division against head of the Ukrainian People's Republic Symon Petliura and his Polish allies. Shchors was slain in battle.

Much of Khalatnikov's research has been a collaboration with, or inspired by, Lev Landau, including the Landau-Khalatnikov theory of superfluidity.

Lev Landau Soviet physicist

Lev Davidovich Landau was a Soviet physicist who made fundamental contributions to many areas of theoretical physics.

Superfluidity non-classical state of the matter

Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without loss of kinetic energy. When stirred, a superfluid forms cellular vortices that continue to rotate indefinitely. Superfluidity occurs in two isotopes of helium when they are liquified by cooling to cryogenic temperatures. It is also a property of various other exotic states of matter theorized to exist in astrophysics, high-energy physics, and theories of quantum gravity. The phenomenon is related to Bose–Einstein condensation, but neither is a specific type of the other: not all Bose-Einstein condensates can be regarded as superfluids, and not all superfluids are Bose–Einstein condensates. The theory of superfluidity was developed by Lev Landau.

In 1970, inspired by the mixmaster model introduced by Charles W. Misner, then at Princeton University, Khalatnikov, together with Vladimir A. Belinsky and Evgeny Mikhailovich Lifshitz, introduced what has become known as the BKL conjecture, which is widely regarded as one of the most outstanding open problems in the classical theory of gravitation.

The Mixmaster universe is a solution to Einstein field equations of general relativity studied by Charles Misner in an effort to better understand the dynamics of the early universe. He hoped to solve the horizon problem in a natural way by showing that the early universe underwent an oscillatory, chaotic epoch.

Charles W. Misner American physicist

Charles W. Misner is an American physicist and one of the authors of Gravitation. His specialties include general relativity and cosmology. His work has also provided early foundations for studies of quantum gravity and numerical relativity.

Princeton University University in Princeton, New Jersey

Princeton University is a private Ivy League research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the nine colonial colleges chartered before the American Revolution. The institution moved to Newark in 1747, then to the current site nine years later, and renamed itself Princeton University in 1896.

Khalatnikov directed the Landau Institute for Theoretical Physics in Moscow from 1965 to 1992. He was elected to the Soviet Academy of Sciences in 1984. He has been awarded the Landau Prize and the Alexander von Humboldt Award, and he is a foreign member of the Royal Society of London.

The L. D. Landau Institute for Theoretical Physics of the Russian Academy of Sciences is a research institution, located in the small town of Chernogolovka near Moscow. Its main fields of research are

Moscow Capital city of Russia

Moscow is the capital and most populous city of Russia, with 13.2 million residents within the city limits, 17 million within the urban area and 20 million within the metropolitan area. Moscow is one of Russia's federal cities.

He is portrayed by Georg Nikoloff in The Theory of Everything .

<i>The Theory of Everything</i> (2014 film) 2014 film by James Marsh

The Theory of Everything is a 2014 biographical romantic drama film which is set at Cambridge University and details the life of the theoretical physicist Stephen Hawking. It was directed by James Marsh and adapted by Anthony McCarten from the memoir Travelling to Infinity: My Life with Stephen by Jane Hawking, which deals with her relationship with her ex-husband, theoretical physicist Stephen Hawking, his diagnosis of amyotrophic lateral sclerosis, and his success in physics.

Honours and awards

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