Termodynamika kvantové kapaliny zkoumána pomocí parametrické interakce neklasických zvuků

Název projektu anglicky
Thermodynamics of quantum liquid investigated through parametric interaction of nonclassical sounds
Anotace anglicky
Superfluid helium-4 is a liquid that can undergo two types of motion at once – a viscous normal flow and an inviscid superflow. This additional degree of freedom leads to new longitudinal sounds: in addition to the ordinary first sound, out-of-phase oscillation of the two flows is possible, called the second sound. The second sound can also be described as an entropy wave, in contrast with the first sound pressure wave. These sounds interact non-linearly through a three-wave process, which ought to lead to parametric coupling between their resonances. This interaction is remarkably similar to the coupling between light and mechanical motion in cavity optomechanics, which allows unprecedented sensitivity in detecting mechanical motion. In the proposed project, we will study the interaction between the first and second sounds, or their combination called the fourth sound, in superfluid helium using a resonant cavity with a high acoustic quality factor. We will develop acoustic analogs to optomechanics with the ultimate aim of studying the minute temperature fluctuations associated with

Kategorie VaV
ZV - Základní výzkum
OECD FORD - hlavní obor
10307 - Acoustics
OECD FORD - vedlejší obor
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
OECD FORD - další vedlejší obor
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CEP - odpovídající obory <br>(dle <a href="http://www.vyzkum.cz/storage/att/E6EF7938F0E854BAE520AC119FB22E8D/Prevodnik_oboru_Frascati.pdf">převodníku</a>)
BI - Akustika a kmity<br>BM - Fyzika pevných látek a magnetismus

Důvěrnost údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Systémové označení dodávky dat
CEP25-GA0-GA-R
Datum dodání záznamu
27. 2. 2025

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