Joachim Schröter

Joachim Schröter (born April 23, 1931 in Dresden ) is a German theoretical physicist .

Life

From 1941 Schröter was a student at the Dresden Kreuzgymnasium and at the same time a member of the Kreuzchor . After his graduation in 1949 he studied biology at the Free University of Berlin , but moved in 1950 to the specialist physics , which he in 1957 with the diploma graduated in 1962 and Günther Ludwig doctorate was. As his assistant, Schröter followed him to the Philipps University of Marburg , where he completed his habilitation in 1965 and was appointed lecturer in theoretical physics in 1966. In 1971 he spent a research semester at the Max Planck Institute for Biophysics and in 1972 he accepted an appointment to an H2 professorship in Marburg and in 1973 to an H4 professorship for theoretical physics at the newly founded University of Paderborn . He was heavily involved in building them up, u. a. several times as dean and vice dean. In 1992/93 Schröter was a member of the international research group Semantical Aspects of Spacetime Theory , headed by Ulrich Majer and Heinz-Jürgen Schmidt, at the Center for Interdisciplinary Research at Bielefeld University and retired in 1996.

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The main area of ​​work was initially statistical physics , above all dealing with basic questions; z. B. How can one derive a macroscopic theory of irreversible processes from a microscopic theory that describes reversible processes . This includes work on macroscopic observables and statistical aggregates of macro systems, as well as the derivation of the Boltzmann equation and its generalization, a so-called master equation . During the stay at the MPI for Biophysics, I also dealt with transport processes through membranes as part of a microscopic theory of electrolytes . This includes work on the derivation of generalized Nernst-Planck equations in which pair correlations are taken into account. In this context, there are also studies of so-called normal solutions of the Fokker-Planck equation . These considerations were generalized to a Boltzmann equation for correlation functions and a correlation thermodynamics derived therefrom, which u. a. was used to calculate transport coefficients in plasmas. Some studies on quantum mechanics are linked to the statistical physics research area . The preoccupation with the theory of relativity resulted in problems that led to two further areas of work. The questions to be solved are: How is it possible to justify the non-visual space-time conceptions of general relativity , and what is a justification? The treatment of the latter problem is part of the meta-theory of physics, which is the focus of Schröter's work up to his retirement. The starting point was the concept of physical theories developed by Günther Ludwig. The space-time theory established here was later further developed by Udo Schelb.

Fonts (selection)

Statistical Physics

• On the concept of macroscopic observables in classical mechanics and a generalization of the Boltzmann equation . Dissertation, FU Berlin, 1962.
• A Derivation of Boltzmann's Equation with at Assumption of determinacy, Part I . In: Physica , 30, 1964, pp. 479-492 (together with G. Ludwig and WJC Müller).
• A Derivation of Boltzmann's Equation with an Assumption of Determinacy, Part II . In: Physica , 31, 1965, pp. 1649–1672 (together with G. Ludwig and WJC Müller).
• A Master's Equation for Gases . In: Physica , 31, 1965, pp. 1-32.
• A macroscopic equation of motion for dilute gases . Habilitation thesis, Marburg 1965.
• The Concept of Reversibility and Irreversibility in Thermostatics . In: Z. Naturf. , 26a, 1971, pp. 849-855.
• Equilibrium Properties of an Ion Exchange Membrane System . In: Ber. Bunsenges. Phys. Chem. , 76, 1972, pp. 1198-1202.
• Kinetic derivation generalized Nernst-Planck equations, Part I . In: Ann. Phys., Lpz. 32, 1975, pp. 19-32 (together with G. West).
• Kinetic derivation of generalized Nernst-Planck equations, part II . In: Ann. Phys., Lpz. 32, 1975, pp. 33-44 (together with G. West).
• Kinetic derivation of generalized Nernst-Planck equations, part III . In: Ann. Phys., Lpz. 32, 1975, pp. 227-237 (together with G. West).
• Kinetic derivation of generalized Nernst-Planck equations, part IV . In: Ann. Phys., Lpz. 33, 1976, pp. 125-131 (together with G. West and A. Grauel).
• Approximate solution of a generalized Nernst-Planck equation for a one-dimensional membrane model . In: Z. Naturf. , 31a, 1976, pp. 815-822 (together with H.-P. Stormberg).
• The Complete Chapman-Enskog Procedure for the Fokker-Planck Equation . In: Arch. Rational Mech. Anal. , 66, 1977, pp. 183-199.
• Ion and Water Transport through Ion Exchange Membranes . In: Z. Naturf. , 33a, 1978, pp. 658-665 (together with H.-P. Stormberg).
• Proper and Normal Solutions of the Fokker-Planck Equation . In: Arch. Rational Mech. Anal. , 76, 1981, pp. 193-246 (together with J. Meyer).
• Comments on the Grad Procedure for the Fokker-Planck Equation . In: J. Stat. Phys. , 32, 1983, pp. 53-69 (together with J. Meyer).
• The Microscopic Background of Thermodynamics . In: J. Non-Equilib. Thermdyn. , 11, 1986, pp. 315-326.
• Kinetic Theory of Charged Particles . In: I. Müller, T. Ruggeri (Eds.) Kinetic Theory and Extended Thermodynamics . Bologna 1987, pp. 295-311.
• Correlational Thermodynamics of Plasmas, Part I: Kinetic Background and Equilibrium Properties . In: J. Non-Equilib. Thermodyn. , 17, 1992, pp. 245-280 (together with P. Konopka).
• Correlational Thermodynamics of Plasmas, Part II: Electric Conductivity . In: J. Non-Equilib. Thermodyn. , 17, 1992, pp. 343-381 (together with P. Konopka).
• Correlational Thermodynamics of Plasmas, Part III: Transport Coefficients . In: J. Non-Equilib. Thermodyn. , 18, 1993, pp. 59-101 (together with P. Konopka).
• Correlational Kinetics, Part I: General Theory . In: Physica A , 219, 1995, pp. 159–188 (together with R. Wegener)
• Correlational Kinetics, Part II: Boltzmann Collision Terms . In: Physica A , 219, 1995, pp. 189-211 (together with R. Wegener).

Quantum mechanics

• Classical Mechanics as a Limit of Quantum Mechanics . In: Ann. Phys., Lpz. 23, 1969, pp. 15-27.
• A Note Concerning Propositions in Quantum Mechanics . In: Ann. Phys., Lpz. 25, 1970, pp. 243-245.
• Canonical Transformations in Quantum Mechanics . In: Ann, Phys., Lpz. 26, 1971, pp. 59-65 (together with M. Westström).
• Time Dependent Coordinate Transformations . In: Ann. Phys., Lpz. 26, 1971, pp. 66-72 (together with M. Weström).
• Expectation Values ​​for Unbounded Observables . In: Int. J. Theor. Phys. , 7, 1973, pp. 431-442 (together with K. Kraus).
• A New Approach to the Multi-Particle Problem in Quantum Mechanics . arxiv : 1211.1895

Relativity theory and meta-theory

• An Axiomatic Basis of Space-Time Theory, Part I . In: Rep. On Math. Phys. , 26, 1988, pp. 303-333.
• An Axiomatic Basic of Space-Time-Theory, Part II . In: Rep. On Math. Phys. , 31, 1992, pp. 5-27 (together with U. Schelb)
• On the Relation between Space-Time Theory and General Relativity . In: Report No. 18/93 of the Research Group on Semantical Aspects of Spacetime Theories, Center for Interdisciplinary Research, Univ. of Bielefeld (together with U. Schelb).
• Remarks Concerning the Notion of Free Fall in Axiomatic Space-Time Theory and Related Topics . In: General Rel. And Grav. , 27, 1995, pp. 605-627 (together with U. Schelb).
• A New Formulation of General Relativity . In: Adv.Theor. Math. Phys. , 13, 2009, pp. 1713-1770.
• An Extension of Friedman-Robertson-Walker Theory . In: Adv. Theor. Math. Phys. , 16, 2012, pp. 393-419.
• To the meta-theory of physics . Walter de Gruyter, Berlin 1996, p. 708 pages.
• The scientific worldview: truth or fiction? In: Z. Semiotik, 24, 2002, pp. 431-447.

Web links

• Homepage at the University of Paderborn