Time and irreversibility in axiomatic thermodynamics

Marsland, Robert; Brown, Harvey R.; Valente, Giovanni

doi:10.1119/1.4914528

Cited by 8 publications

(9 citation statements)

References 25 publications

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“…16 In the next section (together with accompanying appendices) we briefly outline how this is done by Lieb and Yngvason (1999) 17 and by accounts, like those of Landsberg (1956Landsberg ( , 1961 and Buchdahl (1966), which take as their starting point Carathéodory's statement of the second law. As we shall see, this reveals what Marsland et al (2015) refer to as an 'ambiguity' in both formulations.…”

Section: Part I Thermodynamic Considerations 2 States and Variablesmentioning

confidence: 73%

“…16 An alternative to this is an account like that of Callen (1985) and Swendsen (2017b) based on postulates which assert the existence and properties of entropy. The entropy maximization principle in Callen's Postulate II excludes entropy decrease and his Postulate III excludes the possibility of negative temperatures thereby avoiding the ambiguities identified by Marsland et al (2015). Postulate III was subsequently modified by Swendsen to allow for negative temperatures.…”

Section: Adiabatic Processesmentioning

confidence: 99%

“…It should be emphasised that this statement is a consequence of the formal structure of Lieb and Yngvason's approach, neglecting their informal argument for choosing p-simple systems. That this results in two types of systems is regarded by Marsland et al (2015) as an ambiguity in this approach. 28 The case where Ξ consists of p-simple and n-simple subsystems, where (with S(+) true) T > 0 and < 0 respectively, is schematically shown in Fig.…”

Section: The Lieb and Yngvason Accountmentioning

confidence: 99%

See 2 more Smart Citations

The question of negative temperatures in thermodynamics and statistical mechanics

Lavis

2019

Studies in History and Philosophy of Science Part B: Studies in

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We show that both positive and negative absolute temperatures and monotonically increasing and decreasing entropy in adiabatic processes are consistent with Carathéodory's version of the second law and we explore the modifications of the Kelvin-Planck and Clausius versions which are needed to accommodate these possibilities.We show, in part by using the equivalence of distributions and the canonical distribution, that the correct microcanonical entropy, is the surface (Boltzmann) form rather than the bulk (Gibbs) form thereby providing for the possibility of negative temperatures and we counter the contention on the part of a number of authors that the surface entropy fails to satisfy fundamental thermodynamic relationships.

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Section: Part I Thermodynamic Considerations 2 States and Variablesmentioning

confidence: 73%

Section: Adiabatic Processesmentioning

confidence: 99%

Section: The Lieb and Yngvason Accountmentioning

confidence: 99%

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The question of negative temperatures in thermodynamics and statistical mechanics

Lavis

2019

Studies in History and Philosophy of Science Part B: Studies in

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“…As explained in [11,13], Kelvin's statement of the second law sets a definite direction to the 'irreversibility' of the second law, stating that it is impossible to convert heat completely into work (without any other side-effects), but it is possible to do the reverse; axiomatic-type statements are weaker, in that they only imply the irreversibility of some transformation, without specifying which direction is forbidden. In this work the two approaches are unified, and heat and work given scale-independent constructor-theoretic characterisations.…”

Section: The Logic Of the Solutionmentioning

confidence: 99%

Constructor Theory of Information

Marletto

2016

Information and Interaction

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We propose a theory of information expressed solely in terms of which transformations of physical systems are possible and which are impossiblei.e. in constructor-theoretic terms. It includes conjectured, exact laws of physics expressing the regularities that allow information to be physically instantiated. Although these laws are directly about information, independently of the details of particular physical instantiations, information is not regarded as an a priori mathematical or logical concept, but as something whose nature and properties are determined by the laws of physics alone. This theory solves a problem at the foundations of existing information theory, namely that information and distinguishability are each defined in terms of the other. It also explains the relationship between classical and quantum information, and reveals the single, constructortheoretic property underlying the most distinctive phenomena associated with the latter, including the lack of in-principle distinguishability of some states, the impossibility of cloning, the existence of pairs of variables that cannot simultaneously have sharp values, the fact that measurement processes can be both deterministic and unpredictable, the irreducible perturbation caused by measurement, and locally inaccessible information (as in entangled systems).

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“…The viscoelastic characterization of SAPD undergoes a nanoscale strain-stress response under thermal equilibrium condition at room temperature and the SAPD's elastic properties are only considered. 9,13,14 As a result, the elastic property of SAPD induced by ionizing radiation is equivalent to a simple harmonic oscillator under free external driving force conditions. 13,15 The elastic shear modulus of the SAPD can then be measured via a thermal-induced elastic shear wave (TIESW) generated in the SAPD by a two-frequency polarized heterodyne interferometer (TFPHI).…”

Section: Introductionmentioning

confidence: 99%

Measurement of tissue-radiation dosage using a thermal steady-state elastic shear wave

Chang¹,

Hsieh²,

Chen³

et al. 2017

J. Biomed. Opt

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A biodosimeter based on thermal-induced elastic shear wave (TIESW) in silicone acellular porcine dermis (SAPD) at thermal steady state has been proposed and demonstrated. A square slab SAPD treated with ionizing radiation was tested. The SAPD becomes a continuous homogeneous and isotropic viscoelastic medium due to the generation of randomly coiled collagen fibers formed from their bundle-like structure in the dermis. A harmonic TIESW then propagates on the surface of the SAPD as measured by a nanometer-scaled strain-stress response under thermal equilibrium conditions at room temperature. TIESW oscillation frequency was noninvasively measured in real time by monitoring the transverse displacement of the TIESW on the SAPD surface. Because the elastic shear modulus is highly sensitive to absorbed doses of ionizing radiation, this proposed biodosimeter can become a highly sensitive and noninvasive method for quantitatively determining tissue-absorbed dosage in terms of TIESW’s oscillation frequency. Detection sensitivity at 1 cGy and dynamic ranges covering 1 to 40 cGy and 80 to 500 cGy were demonstrated.

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Time and irreversibility in axiomatic thermodynamics

Cited by 8 publications

References 25 publications

The question of negative temperatures in thermodynamics and statistical mechanics

The question of negative temperatures in thermodynamics and statistical mechanics

Constructor Theory of Information

Measurement of tissue-radiation dosage using a thermal steady-state elastic shear wave

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