In General > s.a. Kinetic Theory; quantum field theory; statistical mechanics; thermodynamic systems.
* Idea: The study of the possible internal states of macroscopic systems; It uses macroscopic variables such as n or N, p, V, T, S, and the chemical potential μ, related by equations of state, as the basic ones.
* Motivation: Originally, it was important because of engineering applications (for example, heat \(\mapsto\) work in locomotives or work \(\mapsto\) heat in cannon boring and Joule's experiments; Now it is important because it involves the relationship between macroscopic and microscopic descriptions, information, and time.

Formalism and Effects > s.a. coherent states; laws of thermodynamics; heat [including bath]; Heat Engines; Legendre Transform; time.
* Fundamental identity: An expression for dU as a sum of products of conjugate quantities, for example dU = T dSp dV; Not to be confused with the first law of thermodynamics, dU = dQ – dW.
* Geometry of state space: Different metrics that have been introduced are the Ruppeiner metric, Weinhold metric, and Quevedo metric.
@ General references: Lavenda 95 [extreme situations]; Cooper a1108 [systematic approach to thermodynamical identities]; Etkin a1401 [methodological principles].
@ Coarse-graining: Schulman & Gaveau FP(01) [scale, and order]; > s.a. entropy; lattice field theory.
@ Phase separation: Gross PhyE(05)cm/04-in [and microcanonical statistics].
@ Geometry of state space: Chen JMP(99); Santoro & Preston mp/05 [2 degrees of freedom, Weinhold metric]; Quevedo JMP(07)phy/06; Quevedo et al a0811 [ideal gas]; Pavlov & Sergeev TMP(08) [symplectic structure and Hamiltonian]; Vázquez et al JGP(10)-a1101; Quevedo et al GRG(11)-a1010 [phase transitions]; Ruppeiner AJP(10)nov, Quevedo et al JKPS(10)-a1011 [thermodynamic curvature and interactions]; Cooper & Russell a1102 [state space as a measure space with two orderings]; Quevedo & Ramírez a1205 [van der Waals system, phase transition]; Sivak & Crooks PRL(12) [from friction tensor]; Bravetti & Nettel PRD(14)-a1208 [thermodynamic curvature]; Mansoori et al JHEP(11)-a1411; Hosseini Mansoori et al PLB(16)-a1602 [extrinsic curvature]; > s.a. black-hole thermodynamics; Geometrothermodynamics; phase transitions; Ruppeiner Metric; thermodynamical systems.
@ Lagrangian description: Vaz a1110 [motivated by possible microstructure of spacetime].
@ Hamiltonian approach: Maslov TMP(94) [and quantization]; Baldiotti et al AP(16)-a1604.
@ And information theory: Gagliardi & Di Carlo PhyA(12) [information-related potentials]; Strasberg et al PRX(17)-a1610 [framework]; Bera et al a1707 [thermodynamics from information conservation]; > s.a. information; thermodynamic laws.
@ Related topics: Ghosh & Mukhopadhyay AJP(95)aug [and macroscopic motion]; Hannay AJP(06)feb [Carnot's vector field formulation]; Kerr & Macosko AJP(11)sep [Venn diagrams for potentials].
@ Other concepts: Samiullah AJP(07)jul [reversible process]; news sn(10)jun [extracting work from random motion].
> Basic concepts: see Chemical Potential; energy [equipartition]; Enthalpy; Equation of State; Free Energy; heat; temperature; Thermodynamic Limit.
> Other concepts: see Compressibility; Contact Geometry; entanglement; Exergy; Extensive Quantities; specific heat; Phase Diagram; vacuum.
> Effects, phenomena: see Continuous Media; critical phenomena; Joule Expansion; Paradoxes; phase transitions; Thermoluminescence.
> Results: see Gibbs-Duhem Relation; hamilton-jacobi theory; Initial Conditions; Maxwell Relations.
> Generalized frameworks: see modified thermodynamics; non-equilibrium thermodynamics; non-extensive statistical mechanics.

References > s.a. computation and computational physics; generalized; history; physics teaching; statistical mechanics.
@ Books, I: Goldstein 93; Schneider & Sagan 05 [and life]; Atkins 07.
@ Books, II: Bergmann 62; Morse 64; Kittel & Kroemer 80 [statistical mechanics first]; Berry 91; Bailyn 94 [historical]; Carrington 94; Lee 02 [entropy, free energy]; Turns 06; Stowe 07; Lemons 08; Blundell & Blundell 09 [r PT(07)oct]; Helrich 09 [and irreversibility]; Hoch 11; Goodstein 15; Olla 15; Tosun 15.
@ Books, III: O'Connell & Haile 05 [chemical engineering]; Cheng 06 [statistical]; Honig 07; de Oliveira 13; Hari Dass 13.
@ Books, problems: Lim 90.
@ Books: Bridgman 41 [conceptual]; Fermi 57; Pippard 64; Schrödinger 64; Truesdell 84; Callen 85; Griffiths 85; Guggenheim 85; Waldram 85; Martin 86; Bauman 92; Greiner et al 95; Zemansky & Dittman 97; Assael et al 11 [commonly asked questions].
@ Conceptual foundations: Emch & Liu 02 [logic]; Callender SHPMP(01) [re taking thermodynamics too literally]; Hemmo & Shenker SHPMP(01), PhSc(03)apr, SHPMP(05) [from decoherence?]; Antoniou FP(02) [Carathéodory]; Mahler et al PhyE(05)qp [in composite systems]; Abou Salem & Fröhlich JSP(07)mp/06 [status of laws]; > s.a. statistical mechanics [approach to equilibrium]; Thermodynamic Limit.
@ Mathematical foundations: Giles 64; Owen 84; Sewell RPMP(13) [formulations of local thermodynamical equilibrium conditions, three levels].
> Online resources: Internet Encyclopedia of Science pages.

"If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations—then so much the worse for Maxwell's equations. If it is found to be contradicted by observation—well these experimentalists do bungle things sometimes. But if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation."
Sir Arthur Stanley Eddington, Gifford Lectures (1927), The Nature of the Physical World (1928).

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