Quantum simulators at negative absolute temperatures
نویسندگان
چکیده
منابع مشابه
The Physics of Negative Absolute Temperatures
Negative absolute temperatures were introduced into experimental physics by Purcell and Pound, who successfully applied this concept to nuclear spins; nevertheless the concept has proved controversial : a recent article aroused considerable interest by its claim, based on a classical entropy formula (the ‘volume entropy’) due to Gibbs, that negative temperatures violated basic principles of sta...
متن کاملInconsistent thermostatistics and negative absolute temperatures
A considerable body of experimental and theoretical work claims the existence of negative absolute temperatures in spin systems and ultra-cold quantum gases. Here, we clarify that such findings can be attributed to the use of a popular yet inconsistent entropy definition, which violates fundamental thermodynamic relations and fails to produce sensible results for simple analytically tractable c...
متن کاملComment on “ Consistent thermostatistics forbids negative absolute temperatures ”
In their paper [1], Dunkel and Hilbert argue that negative absolute temperatures, a wellestablished thermodynamic concept, are inconsistent with thermodynamics. They claim to “prove that all previous negative temperature claims and their implications are invalid as they arise from the use of an entropy definition that is inconsistent both mathematically and thermodynamically”. Here we point out...
متن کاملCommunicability and multipartite structures in complex networks at negative absolute temperatures.
We here present a method of clearly identifying multipartite subgraphs in a network. The method is based on a recently introduced concept of the communicability, which very clearly identifies communities in a complex network. We here show that, while the communicability at a positive temperature is useful in identifying communities, the communicability at a negative temperature is useful in ide...
متن کاملNuclear magnetism in silver at positive and negative absolute temperatures in the low nanokelvin range.
Rights: © 1990 American Physical Society (APS). This is the accepted version of the following article: Hakonen, Pertti J. & Yin, S. & Lounasmaa, O. V. 1990. Nuclear magnetism in silver at positive and negative absolute temperatures in the low nanokelvin range. Physical Review Letters. Volume 64, Issue 22. 2707-2710. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.64.2707, which has been publ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2012
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.85.043612