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Pyotr Kapitsa

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description Pyotr Kapitsa Overview

Pyotr Kapitsa was a Soviet physicist renowned for his groundbreaking research into condensed matter physics. His experiments with liquid helium revealed the phenomenon of superfluidity – a state of matter exhibiting zero viscosity and quantum mechanical properties at extremely low temperatures. This discovery, made in the early 20th century, significantly advanced our understanding of phase transitions and remains crucial for applications in areas like superconductivity and precision measurement. Kapitsa’s work earned him the 1978 Nobel Prize and continues to impact scientists studying materials at extreme conditions.

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What did Pyotr Kapitsa discover about liquid helium?

In 1937, Kapitsa showed that liquid helium can flow without measurable resistance at very low temperatures. This quantum behavior became known as superfluidity, according to the [Nobel Prize](https://www.nobelprize.org/prizes/physics/1978/kapitsa/facts/).

At what temperature does helium-4 become superfluid?

Helium-4 becomes superfluid at around 2.17 K above absolute zero. Kapitsa's experiments on this low-temperature transition were central to the discovery recognized by his 1978 Nobel Prize.

Which Nobel Prize did Pyotr Kapitsa win?

Kapitsa received half of the 1978 Nobel Prize in Physics for basic inventions and discoveries in low-temperature physics. The other half was shared by Arno Penzias and Robert Wilson for their work in cosmology.

What did Kapitsa achieve before his superfluidity research?

In 1934, he developed a method for producing liquid helium in large quantities. Earlier, in 1924, he had also created magnetic fields reaching about 320 kilogauss at the Cavendish Laboratory.