Low-Temperature Thermodynamics of Quantum Systems

2001 ◽  
pp. 43-52
Author(s):  
C. S. Hellberg
Keyword(s):  
Low Temperature ◽  
Quantum Systems

scholarly journals Quantum thermodynamics at low temperatures

2021 ◽  
Vol 52 (3) ◽  
pp. 15-17
Author(s):  
Jukka P. Pekola
Keyword(s):  
Quantum Information ◽  
Low Temperature ◽  
Low Temperatures ◽  
Quantum Information Processing ◽  
Quantum Systems ◽  
Quantum Thermodynamics ◽  
Heat Engines ◽  
Per Se ◽  
Working Media ◽  
Quantum Heat Engines

Low temperature phenomena and methods are quantum thermodynamics per se. Modern engineered quantum systems, for instance those used for superconducting quantum information processing and mesoscopic electron transport, provide working media for realizing devices such as quantum heat engines and refrigerators and a testbed for fundamental principles and phenomena in thermodynamics of quantum systems and processes.

scholarly journals Improved thermometry of low-temperature quantum systems by a ring-structure probe

2015 ◽  
Vol 92 (5) ◽  
Author(s):  
Li-Sha Guo ◽  
Bao-Ming Xu ◽  
Jian Zou ◽  
Bin Shao
Keyword(s):  
Low Temperature ◽  
Ring Structure ◽  
Quantum Systems

scholarly journals Thermality Versus Objectivity: Can They Peacefully Coexist?

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1506
Author(s):  
Thao P. Le ◽  
Andreas Winter ◽  
Gerardo Adesso
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Temperature Limit ◽  
Quantum Systems ◽  
The Other ◽  
Quantum Regime ◽  
Classical Information ◽  
High Temperature Limit ◽  
Macroscopic Objects ◽  
External Environments

Under the influence of external environments, quantum systems can undergo various different processes, including decoherence and equilibration. We observe that macroscopic objects are both objective and thermal, thus leading to the expectation that both objectivity and thermalisation can peacefully coexist on the quantum regime too. Crucially, however, objectivity relies on distributed classical information that could conflict with thermalisation. Here, we examine the overlap between thermal and objective states. We find that in general, one cannot exist when the other is present. However, there are certain regimes where thermality and objectivity are more likely to coexist: in the high temperature limit, at the non-degenerate low temperature limit, and when the environment is large. This is consistent with our experiences that everyday-sized objects can be both thermal and objective.

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

1978 ◽  
Vol 36 (1) ◽  
pp. 474-475
Author(s):  
P.P.K. Smith
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Homogeneous Nucleation ◽  
Silicate Mineral ◽  
Antiphase Boundaries ◽  
Two Phase ◽  
Primitive Form ◽  
The Core ◽  
Nucleation Mechanisms ◽  
And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

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