Most of my recent papers are also available via the preprint server arXiv.org. Please note that the downloadable papers are intended as a scientific ressource for private use.
[→ Scientific Papers (PDF)]
- Über automorphe Funktionen mehrerer Veränderlicher. Diploma thesis, Universität Leipzig, 1954.
- Normierte Divisorfunktionen. PhD thesis, Universität Leipzig, 1957.
- Über den Begriff der Energie bei gekrümmter Raum- Zeit-Mannigfaltigkeit. Habilitation thesis, Universität Jena, 1960. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 9 (1959/60) 459-489. [PDF]
- Zur zweiten Quantelung bei symmetrischer Statistik. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 7 (1957/58) 115-122. [PDF]
- Gemischte Differentiale und die Theorie von HODGE auf nicht notwendig orientierbaren Mannigfaltigkeiten. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 8 (1958/59) 31-35. [PDF]
- Gemischte Differentiale und das Transformationsverhalten einiger Feldgleichungen. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 8 (1958/59) 247-252. [PDF]
- Das Rechnen mit alternierenden Differentialformen. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 8 (1958/59) 351-355. [PDF]
- Über Quantentheorien mit indefiniter Metrik. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 8 (1958/59) 361-366. [PDF]
- Schema einer Quantenmechanik mit indefiniter Metrik. Nucl. Phys. 9 (1958/59) 588-595. [PDF]
- Über den Begriff der Energie bei gekrümmter Raum- Zeit-Mannigfaltigkeit. Vorläufige Mitteilung. Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Nat.R. 9 (1959/60) 67-70. [PDF]
- Untersuchungen über Quantentheorien mit indefiniter Metrik. Nucl. Phys. 12 (1959) 103. [PDF]
- Zur Lokalisierung der Energie in der Allgemeinen Relativitätstheorie. Acta Phys. Pol. 19 (1960) 133-138. [PDF]
- Zum Aufbau der Relativitätstheorie nach Alexandrow. In: Naturwissenschaft und Philosophie. Akademie-Verlag, Berlin 1960, 243 - 251. [PDF]
- Bemerkung über die Darstellung der Gruppe der Raum-Zeit- Translationen im Heisenberg-Bild. In: 6. Internationale Arbeitstagung über die Physik hoher Energien, Weimar 1960. (U. Krecker ed.), Zeuthen 1960, p. 135. [PDF]
- Über eine Klasse dynamischer Größen. Acta Phys. Hung. 13 (1961) 75-88. [PDF]
- Spectral Integral for the Representation of the Space-Time Translation Group in Relativistic Quantum Theory. Ann. of Phys. 13 (1961) 453-462. [PDF]
- Über die Definition der Quantenfelder nach Wightman und Haag. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Nat.R. 11 (1962), 213-217. [PDF]
- Remark on the Future Tube. Acta Phys. Pol. 24 (1963) 293. [PDF]
- The Closure of Minkowski Space. Acta Phys. Pol. 24 (1963) 295 - 296. [PDF]
- Kausalität und Physik. Wiss. Z. Humboldt-Univ. zu Berlin, Math.-Nat. 12 (1963) 383-385. [PDF]
- Über die Algebra der Feldoperatoren (Teil 1). Preprint des Theor.-Phys. Inst. Leipzig, TUL 3, 9/1963. [PDF]
- Remark on Number Operators in Axiomatic Quantum Field Theory. Preprint des Theor.-Phys. Inst. Leipzig, TUL 7, 5/1964. [PDF]
- Some elementary properties of Haag rings. Preprint des Theor.-Phys. Inst. Leipzig, TUL 8, 5/1964. [PDF]
- Observables. Karpacz Winter School for Theoretical Physics 1964, Preprint Wroclaw University 3/71, Wroclaw 1964, 1-17. [PDF]
- Bemerkungen zu einem Satz von Reeh und Schlieder. Wiss. Z. Friedrich-Schiller-Univ., Math.-Nat. R., 2 (1964) 235. [PDF]
- Something About SU(6). Wroclaw University, Mimeographed Lecture Notes of the 2nd Winter School of Theoretical Physics, Vol. 2, 1965, and Preprint Theor.-Phys. Inst. Leipzig, TUL 12, 5/1965. [PDF]
- Recent Developments in Axiomatic Quantum Field Theory. Proc. of the Karpacz Winter School 1964.
- Ein Blick auf einige Ergebnisse der axiomatischen Quantenfeldtheorie. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Nat. R. 14 (1965) 785-787. [PDF]
- Über die Wightman-Konstruktion. Publ. Univ. Krakow, 1965. [PDF]
- On the General Structure of an Operator which is Multiplicative with respect to a Symmetry Group. Publ. JINR, Dubna, USSR, E - 2542, (1966) 1 - 5. [PDF]
- SU(6) and the Operators CPT and C. Publ. JINR, Dubna, USSR, E - 2545 (1966) 1-9. [PDF]
- Plus Parity Mesons and the 189-plet of SU(6). Publ. JINR, Dubna, USSR, E - 2557 (1966) 1-9. [PDF]
With D. Robaschik
- Calculation of the Coeffizients of the Mass Operators. Publ. JINR, Dubna, USSR, E - 2771 (1966) 1-11. [PDF]
With D. Robaschik
- 189/W and Meson Decays. Publ. JINR, Dubna, USSR, E2 - 3102 (1966) 1-20. [PDF]
With D. Robaschik
- Faithful Representations of Algebras of Test Functions. Publ. JINR, Dubna, USSR, E2 - 3583 (1967) 1-9. [PDF]
With G. Laßner
- Group structure containing the Poincaré-group and admitting representations with non-degenerate mass-spectrum. Proc. of the Yalta School, Kiev 1967.
- Group structure with intrinsic mass splitting. In: Hochenergiephysik und Elementarteilchentheorie (in Russian), Naukova Dumka, Kiev 1967, p. 313 - 317. [PDF]
- On Positive Functionals on the Algebra of Test Functions. Acta Universitas Wratislaviensis 99 (1968) 64-83. [PDF]
With G. Laßner
- On Positive Functionals on the Algebra of Test Functions. Commun. Math. Phys. 7 (1968) 152-159. [PDF]
With G. Laßner
- Attempt to Construct Test Algebras for Haag-Araki Fields. Acta Universitas Wratislaviensis 99 (1968) 243-270. [PDF]
- On Multiplicative Properties of the Algebra of Test-Functions. Preprint des Theor.-Phys. Inst. Leipzig, TUL 22, 1967. [PDF]
- On formal crossing. In: Topics in Elementary Particle Physics. Proceedings of the International Seminar on Elementary Particle Theory, Varna 1968, 75-78. [PDF]
- Spectral sum rules for the two-point-functions and formfactors. In: Topics in Elementary Particle Physics. Proceedings of the International Seminar on Elementary Particle Theory, Varna 1968, 394-400. [PDF]
With D. Robaschik
- On the Shannon Entropy and Related Functionals on Convex Sets. Rep. Math. Phys. 1 (1970) 147 - 159. [PDF]
- States on *-algebras. Proc. Int. Conf. on Nonlocal Quantum Field Theory. Asau, USSR.
- Some General Properties of *-Algebra Representations. Acta Universitatis Wratislaviensis 164 (1971) 122-138. [PDF]
- Sätze über Dichtematrizen. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Nat. R. 20 (1971) 633 - 637. [PDF]
- Some Properties of the Future Tube. Preprint KMU - HEP - 7209 (1972), 1-14. [PDF]
- Endlich-dimensionale Dichtematrizen I. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Nat. R., 21 (1972), 421-452. [PDF]
- Einige mathematische Strukturen in der Elementarteilchentheorie. In: Wissenschaftliche Haupttagung der Mathematischen Gesellschaft, Vortragsauszüge, Dresden 1972, 252 -256. [PDF]
- The Mixture of States. Karpacz Winter School 1973.
- Endlich-dimensionale Dichtematrizen II. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Nat. R. 22 (1973) 139 - 177. [PDF]
- Properties of the Algebra L+(D). Publ. JINR, Dubna, USSR, E2 - 8149 (1974) 3 - 13. [PDF]
- Bericht über kürzlich bewiesene Entropieungleichungen. In: Tagungsband Arbeitstagung "Statistische Physik" (Physik. Ges. DDR, Herausg.), Berlin 1974, 203-218. [PDF]
- An Introduction to the Algebraic Appoach to some Problems of Theoretical Physics. Série des cours et conf. sur la physique des hautes énergies, CRN Strasbourg, 1974, 1-33. [PDF]
- Unitarily Invariant Convex Functions on the State Space of Type I and Type III von NEUMANN Algebras. Rep. Math. Phys. 7 (1975) 449 -456. [PDF]
- The "Transition Probability" in the State Space of a *-Algebra. Rep. Math. Phys. 9 (1976) 273 - 279. [PDF]
- The general Ising model Rep. Math. Phys. 10 (1976) 285 - 391.
- On some generalizations of the Griffiths inequalities (in Russian). Teor. i. Math. Fiz. (Moskau) 26 (1976) 141. [PDF]
- Zur Beschreibung irreversibler Quantenprozesse. Sizungsber. AdW DDR 14 N (1976) 1-25. [PDF]
- Relative Entropy and the Wigner-Yanase-Dyson-Lieb Concavity in an Interpolation Theory. Comm. Math. Phys. 54 (1977) 21-32. [PDF]
- Markov Master Equation and the Behaviour of some Entropy-like Quantities. (siehe auch: Rostocker Physikalische Manuskripte, Heft 2, 1977, 45 - 54.) In: Proc. Int. Coll. on the Role of Mathematical Physics in the Development of Science. Unesco / College de France, Paris 1977, 160-171. [PDF]
- Some Properties of Quantum Entropy. In: Proc. of the III-rd School of Elementary Particles and High Energy Physics. Primorske, Bulgaria, 1977, 425-427. [PDF]
- On op-Algebras of Unbounded Operators. Proc. of the Steklov Institute of Mathematics, Bd I, Moscow, 1978, 213-228 (also: Trudy Mat. Inst. Steklov 135 (1975)). [PDF]
With G. Laßner
- The Order Structure of States. In: Trudy Mezdunarodny Simpoziuma po Izbranym Problemam Statisticeskoi Mechaniki. Publ. JINR, D 17 - 11490, Dubna 1978, 151 - 161. [PDF]
- Ordnungsstrukturen im Raume der gemischten Zustände und die H-Theoreme von Felderhof - van Kampen. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Nat. R., 27 (1978) 213-228. [PDF]
- H-Theoreme für die Fokker-Planck-Gleichung. Wiss. Z. Karl-Marx-Univ. Leipzig, Math. Nat. R. 27 (1978) 229-234. [PDF]
With B. Crell and T. de Paly
- The Order Structure of States in C*- and W*-Algebras. In: Proc. Int. Conf.on Operator Algebras, Ideals and their Applications in Theoretical Physics. Teubner Texte zur Mathematik. BSB B. G. Teubner Verlagsges., Leipzig 1978, 126-135. [PDF]
With P. M. Alberti
- On Entropy in Quantum Statistics. In: Problems of Theoretical and Mathematical Physics. Publ. JINR D-12831, Dubna 1979, 439-447. [PDF]
- On Quantization in Curved Space Time. In: Proc. Second Conf. on High Energy Physics and Quantum Field Theory. Publ. IFWE, Protvino 1979, 3-17.
- Das wissenschaftliche Erbe Albert Einsteins. In: Leipziger Universitätsreden. Neue Reihe, 22 (1979) 11-19. [PDF]
- Some Remarks on Reflection Positivity. Czech. J. Phys. B 29 (1979), 117-126. [PDF]
- An Example of a Non-Linear Evolution Equation showing "Chaos-Enhancement". Lett. Math. Phys. 3 (1979), 463-465. [ PDF]
With B. Crell
- Quantization Method using Dirichlet's Principle. In: 9-th Int. Conf. on General Relativity and Gravitation. Abstract Vol.III, Jena 1980, 595-596. [PDF]
- Existence and Density Theorems for Stochastic Maps on Commutative C*-Algebras. Math. Nach. 97 (1980), 279-295. [PDF]
With P.M. Alberti
- Remarks on the Relation between Quantum and Classical Entropy as Proposed by A. Wehrl. Rep. Math. Phys. 18 (1980), 177-182. [PDF]
- A Problem Relating to the Positive Linear Maps on a Matrix Algebra. Rep. Math. Phys. 18 (1980), 163-176. [PDF]
With P.M. Alberti
- On a Riemannian Method in Quantum Theory about Curved Space-Time. Czech. J. Phys. B 31 (1981), 1249-1255. [PDF]
- Die Charakterisierung der Lösungen von Mastergleichungen, ein inverses Problem. Ann. Physik (Leipzig), 38 (1981) 329-333. [PDF]
With P.M. Alberti
- A Note on Stochastic Dynamics in the State Space of a Commuting C*-Algebra. J. Math. Phys. 22 (1981), 2345-2351. [ PDF]
With P.M. Alberti
- DISSIPATIVE MOTION IN STATE SPACES. Teubner-Texte zur Mathematik 39. BSB B. G. Teubner Verlagsgesellschaft, Leipzig 1981. [Preface/Contents - PDF]
With P.M. Alberti
- STOCHASTICITY AND PARTIAL ORDER. Mathematische Monographien (H. Koch, G. Laßner, H. Reichardt, R. Sulanke, Herausg.), VEB Deutscher Verlag der Wisenschaften, Berlin, 1981.
With P.M. Alberti
- STOCHASTICITY AND PARTIAL ORDER. Mathematics and Its Applications 9, (M. Hazewinkel, Editor.), VEB Deutscher Verlag der Wissenschaften, Berlin, and Reidel Publ. Company, Dordrecht, Boston, London, 1982. [Contents/Introduction - PDF]
With P.M. Alberti
- On Stochastic Maps of C*-Algebraic State Spaces. In: Ergodic Theory and Related Topics (H. Michel, ed.), Akademie-Verl., Berlin, 1982, 185-193. [PDF]
- Riemannian Method in Quantum Field Theory about Curved Space-time. Czech. J. Phys. B 32 (1982), 573 - 574. [PDF]
- Stochastic Linear Maps and Transition Probability Lett. Math. Phys. 7 (1983) 107-112. [PDF]
With P.M. Alberti
- On Associative Algebras of Superfunctions. In: Quantum Theory of Particles and Fields (J. Janciewicz, J. Lukerski, eds.). World Scientific, Singapore, 1983, 188-200. [PDF]
- Transition Probabilities on W*- and C*-Algebras. In: Proc. Sec. Int. Conf. on Operator Algebras, Ideals, and their Applications in Theor. Physics. (H. Baumgärtel, G. Laßner, A. Pietsch, A. Uhlmann, eds.), Teubner Texte zur Mathematik 67, BSB B. G. Teubner-Verl., Leipzig 1984, 5-11. [PDF]
With P.M. Alberti
- The Cartan Algebra of Exterior Differential Forms as a Supermanifold: Morphisms and Manifolds Associated with them. J. Geom. Phys. 1 (1984) 25-37. [PDF]
- The Transition Probability for States of *-Algebras. Ann. Physik (Leipzig) 42 (1985) 524-532. [PDF]
- Eine Bemerkung über vollständig positive Abbildungen von Dichteoperatoren. Wiss. Z. Karl-Marx-Univ. Leipzig, Math.-Naturwiss. R. 34 (1985) 580 - 582. [PDF]
- Die Cartan-Algebra der äußeren Differentialformen als Supermannigfaltigkeit: Jordan-Automorphismen und ihre Realisierung als Diffeomorphismen. Z. f. Analysis u.i. Anwendungen 4 (1985) 481 -492. [PDF]
- Parallel Transport and Quantum Holonomy along Density Operators. Rep. Math. Phys. 24 (1986) 229-240. [PDF]
- Parallel Transport and Holonomy along Density Operators. In: Differential Geometric Methods in Theoretical Physics. Proc. of the XV DGM Conference ( H. D. Doebner and J. D. Hennig, eds.), World Scientific, Singapore, 1987, 246-254. [PDF]
- Klein Gordon Equations on a Time Lattice. Ann. Physik (Leipzig) 45 (1988) 605 - 613. [PDF]
With N. Hamdan
- On Berry Phases Along Mixtures of States. Ann. Physik (Leipzig) 46 (1989) 63 - 69. [PDF]
- Schrödinger und seine Gleichung. Sitzungsber. Sächsische Akad. Wiss. zu Leipzig, Math.-Nat. Klasse, Bd. 121, Heft 3 (1989) 1-23. [PDF]
- On the Use of Associative Algebras in Differential Geometry. In: Lectures on Supermanifolds, Geometrical Methods and Conformal Groups (H.D.Doebner, J.D.Hennig, T.D.Palev, eds.). World Scientific, Singapore, 1989. [PDF]
- Über Klein-Gordon-Teilchen bei Robertson-Walker-Metrik. Wiss. Z. Friedrich-Schiller-Univ., Jena, Math.Nat.R. 39 (1990) 124-128. [PDF]
- Gauge Field Governing Parallel Transport along Mixed States. Lett. Math. Phys. 21 (1991) 229-236. [PDF]
- Algebra and Geometry in the Theory of Mixed States. In: Symmetry in Physics V (B. Gruber ed.). Plenum Publ. Corporation, New York 1991, 565-583. [PDF]
- Parallel Transport of Phases. In: Differential Geometry, Group Representation, and Quantization (J.Hennig, W.Lücke, J.Tolar, eds.), Lecture Notes in Physics 379, Springer-Verlag, Berlin, New York, 1991, 55-72. [Preprint]
- An Energy Dispersion Estimate. Phys. Lett. A 161 (1992) 329 - 331. [PDF]
- The Metric of Bures and the Geometric Phase. In: Quantum Groups and Related Topics. Proceedings of the First Max Born Symposium (R. Gielerak et al., eds.), Kluwer Acad. Publishers, 1992, 267 - 274. [Preprint]
- JA oder NEIN - Ein wenig Quantenlogik. In: Werner Heisenberg, Physiker und Philosoph (B. Geyer, H. Herweg, H. Rechenberg, Herausg.). Spektrum Akad. Verl. Heidelberg, Berlin, Oxford, 1993, 165-171. [PDF]
- Klein-Gordon Particles in a Tube with a Piston. In: The Earth and the Universe. A Festschrift in honor of Hans-Jürgen Treder (W. Schröder, ed.). Interdivisional Commission on History of IAGA, Bremen 1993, 413-418. [PDF]
- The n-sphere as a quantal state space. In: Symposium on the Foundations of Modern Physics 1993 (P. Busch, P. Lahti, P. Mittelstaedt, eds.), World Scientific, Singapore, 1993, 390-397. [Preprint]
- Parallel lifts and holonomy along density operators: Computable examples using O(3)-orbits. In: Symmetry in Science VI: From the Rotation Group to Quantum Algebras (B. Gruber, ed.), Plenum Press, New York and London, 1993, 741-748.
[Preprint]
- Density Operators as an Arena for Differential Geometry. Rep. Math. Phys. 33 (1993) 253 - 263. [PDF]
- On cyclic evolution of mixed states in two-level systems. In: Nonlinear, Dissipative, Irreversible Quantum Systems. Proceedings of the International Symposium on Mathematical Physics, Clausthal, August 1994 ( H.-D. Doebner, V.K. Dobrev & P. Nattermann, eds.), World Scientific, Singapore, 1995, 296 - 302. [Preprint]
- Spheres and Hemisphere as Quantum State Spaces. J. Geom. Phys. 18 (1996) 76-92. [PDF]
- Geometric phases and related structures. Rep. Math. Phys. 36 (1995) 461-481. [PDF]
- Decompositions of quantum states with respect to entropy. Rep. Math. Phys. 38 (1996) 123-141. [PDF]
With F. Benatti and H. Narnhofer
- Optimizing entropy relative to a channel or a subalgebra. In: Group21. Proc. XXI Int. Coll. on Group Theoretical Methods in Physics (H. D. Doebner, P. Nattermann and W. Scherer, eds.), Vol. I, World Scientific, Singapore, 1997, 343 - 348. [quant-ph/9701014]
- Entropy and optimal decompositions of states relative to a maximal commutative subalgebra. Open Sys.& Inf. Dyn. 5 (1998) 209-227. [quant-ph/9704017]
- Einführung in Grundlagen und Protokolle der Quanteninformatik. Universität Leipzig, Zentrum für Höhere Studien. NTZ-Preprint 33/1998, S. 1-61. [PDF]
With B. Crell
- Entanglement of Assistance. In: Quantum Computing and Quantum Communications. Proceedings of the 1st NASA Internatitional Conference on Quantum Computation and Quantum Communication (C. P. Williams, ed.), Springer-Verlag, Lecture Notes in Computer Science 509, 1999, 247-257. [quant-ph/9803033]
With D.P. DiVincenzo, Ch.A. Fuchs, H. Mabuchi, J.A. Smolin and A. Thapliyal
- Optimal Decompositions with Respect to Entropy and Symmetries. Lett. Math. Phys. 47 (1999) 237-253. [PDF]
With F. Benatti and H. Narnhofer
- Connections and metrics respecting purification of quantum states. J. Math. Phys. 40 (1999) 3246-3267. [PDF]
With J. Dittmann
- On Bures-Distance and *-Algebraic Transition Probability between Inner Derived Positive Linear Forms over W*-Algebras. Acta Applicandae Mathematica 60 (2000) 1-37. [PDF]
With P.M. Alberti
- Quantum channels of the Einstein-Podolski-Rosen kind. In: Theoretical Physics Fin de Siècle. Proceedings of the XII Max Born Symposium, Wroclaw 1998 (A. Borowiec, W. Cegla, B. Jancewicz, W. Karwowski eds.), Lecture notes in physics 539. Springer-Verlag, Berlin, 2000, 93-105. [quant-ph/9901027] [PDF]
- Operators and Maps Affiliated to EPR Channels. In: Trends in Quantum Mechanics (H.-D. Doebner, S. T. Ali, M. Keyl, R. F. Werner eds.). World Scientific, Singapore 2000. [PDF]
- Fidelity and Concurrence between conjugated states. Phys. Rev. A 62 (2000) 032307. [quant-ph/9909060] [PDF]
- "Partial" Fidelities. Rep. Math. Phys. 45 (2000) 407-418. [quant-ph/9912114] [PDF]
- Simultaneous decompositions of two states. Rep. Math. Phys. 46 (2000) 319-324. [quant-ph/0007018] [PDF]
- Das Plancksche Wirkungsquantum - Hundert Jahre danach. Sitzungsber. Leibniz-Sozietät, 42/7 (2000) 75-93. [Preprint]
- Partial Fidelities. In: Quantum Theory and Symmetries (H.D. Doebner, V.K. Dobrev, J.D. Hennig and W. Lücke, eds.). World Scientific, Singapore, 2000, 406-411. [PDF]
- On the LOCC Classification of Bipartite Density Matrices. [quant-ph/0011095]
With P. Hayden and B.M. Terhal,
- On 1-qubit channels. J. Phys. A: Math. Gen. 34 (2001) 7074-7055. [quant-ph/0011106]
- Broken Symmetries in the Entanglement of Formation. J. Math. Phys. 44 (2003) 2402-2415. [quant-ph/0209081] [PDF]
With F. Benatti and H. Narnhofer
- Antilinearity in bipartite quantum systems and imperfect quantum teleportation. In: Quantum Probability and Infinite-dimensional Analysis (W. Freudenberg, ed.) , Vol. 15, World Scientific, Singapore, 2003, 255-26. [quant-ph/0407244] [PDF]
- Quantum information transfer from one system to another one. In: Information Transfer and Combinatorics (R. Ahlswede et al, eds.). Lecture Notes in Computer Science 4123, Springer Verlag, Berlin, New York, 2006, 394-412. [quant-ph/0301116]
- Concurrence and Foliations Induced by Some 1-Qubit Channels. Int. J. Theor. Phys. 42 (2003) 983-999. [quant-ph/0301088] [PDF]
- Raum-Zeit und Quantenphysik. Sitzungsber. Leibniz-Sozietät, 61/5 (2003) 55-70; also in: Information Transfer and Combinatorics (R. Ahlswede et al, eds.), LN Computer Science 4123, Springer Verlag, 2006, 381-393. [Preprint]
- On Rank Two Channels. In: Information Transfer and Combinatorics (R. Ahlswede et al, eds.). Lecture Notes in Computer Science 4123, Springer Verlag, Berlin, New York, 2006, 413-424. [Preprint]
- On Concurrence and Entanglement of Rank Two Channels. Open Sys.& Inf. Dyn. 12 (2005) 93-106. [quant-ph/0605103] [PDF]
- Entangled three-qubit states without concurrence and three-tangle. Phys. Rev. Lett. 97 (2006) 260502. [quant-ph/0606071]
With R. Lohmayer, A. Osterloh and J. Siewert
- Zwischen Ordnung und Unordnung. Leibniz Online 3/2007 (Leibniz-Sozietät, Berlin). [PDF]
- Order Structure (Majorization) and Irreversible Processes. In: Vernetzte Wissenschaften - Crosslinks in Natural and Social Sciences (P.J. Plath, E.-Chr. Haß, eds.). Logos Verlag, Berlin, 2008, 281-290. [Preprint]
With P.M. Alberti, B. Crell and C. Zylka
- Geometry of state spaces. In: Entanglement and Decoherence (A. Buchleitner et al., eds.). Lecture Notes in Physics 768, Springer Verlag, Berlin, New York, 2009, 1-60. [Manuscript version]
With B. Crell
- Tangles of superpositions and the convex-roof extension. Phys. Rev. A 77 (2008) 032310. [quant-ph/0710.5909]
With A. Osterloh and J. Siewert
- Three-tangle for mixtures of generalized GHZ and generalized W states. New Journal of Physics 10 (2008) 043014. [quant-ph/0711.4477]
With C. Eltschka, A. Osterloh and J. Siewert
- Concurrence of stochastic 1-qubit maps. [quant-ph/0802.2092]
With M. Hellmund
- Über Zufall und Wahrscheinlichkeit. In: Synergie- Syntropie-Nichtlineare Systeme 7: Physik, Statistik, Information (W. Eisenberg et al., eds.). Leipziger Universitätsverlag, Leipzig, 2008, 29-36. [PDF]
- Sub- and super-fidelity as bounds for quantum fidelity. Quantum Information and Computation 9 (2009) 103-130. [quant-ph/0805.2037]
With J.A. Miszczak, Z. Puchala, P. Horodecki and K. Zyczkowski
- An entropy inequality. Quantum Information and Computation 9 (2009) 622-627. [quant-ph/0812.0906]
With M. Hellmund
- Concurrence and entanglement entropy of stochastic 1-qubit maps. Phys. Rev. A 79 (2009) 052319. [quant-ph/0903.1340]
With M. Hellmund
- Transition Probability (Fidelity) and its Relatives. Found. Phys. 2010, DOI 10.1007/s10701-009-9381-y. [Preprint]
- Roofs and Convexity. Entropy 12 (2010) 1799-1832. [PDF]
- The Number of Orthogonal Conjugations. Acta Polytechnica 51 (2013) 470-472. [PDF]
- Anti-(Conjugate) Linearity. Science China Physics, Mechanics & Astronomy 59(3) (2016) 630301. [quant-ph/1507.06545]
- DIE GRAMMATIK DER QUANTENWELT. Quantenphysik - Zufall - Zustandsraum. Edition am Gutenbergplatz, Leipzig, 2017. [Errata]