Publikationen 1991 - 2000

[32] W. Freudenberg, M. Ohya and N. Watanabe.
On beam splittings and mathematical construction of quantum logical gate (Japanese).
 Surikaisekikenkyusho Kokyuroku, 1142:23 - 35, 2000. Mathematical aspects of quantum information and quantum chaos.
[31] W. Freudenberg, M. Ohya and N. Watanabe.
On beam splittings and quantum logical gate on Fock space (Japanese).
 Surikaisekikenkyusho Kokyuroku, 1139:113 - 123, 2000. New developments in infinite dimensional analysis and quantum probability theory.
[30] K.-H. Fichtner, W. Freudenberg, and V. Liebscher.
Characterization of Classical and Quantum Poisson Systems by Thinnings and Splittings.
 Mathem. Nachr., 218:25 - 47, 2000.
[29] K.-H. Fichtner, W. Freudenberg, and V. Liebscher.
Non-independent Splittings and Gibbs States.
 Mathematical Notes, 64(4):518-523, 1998.
[28] K.-H. Fichtner, W. Freudenberg, and V. Liebscher.
Splittings of Gibbs states (Russian).
 Math. Zametki, 64(4):598 - 605, 1998.
[27] K.-H. Fichtner, W. Freudenberg, and V. Liebscher.
Time Evolution and Invariance of Boson Systems Given by Beam Splittings.
 In Infinite Dimensional Analysis, Quantum Probability and Related Topics, Vol. 1, No.4, pages 511--531, Singapore, New Jersey, London, Hong Kong, 1998. World Scientific Publishing Co.
[26] K.-H. Fichtner, W. Freudenberg, and V. Liebscher.
Beam Splittings and Time Evolutions of Boson Systems.
 Forschungsergebnise der Fakultät für Mathematik und Informatik, Math/Inf/96/39:105 pages, 1996
[25] W. Freudenberg.
On a class of quantum Markov chains on the Fock space.
 In L. Accardi, editor, Quantum Probability and Related Topics, volume IX, pages 215--237, Singapore, New Jersey, London, Hong Kong, 1994. World Scientific Publishing Co.
[24] W. Freudenberg.
Quantum stochastic integrals on a general Fock space.
 In L. Accardi, editor, Quantum Probability and Related Topics, volume VIII, pages 189 -- 210, Singapore, New Jersey, London, Hong Kong, 1993. World Scientific Publishing Co.
[23] W. Freudenberg.
Characterization of states of infinite boson systems II. On the existence of the conditional reduced density matrix.
 Commun. Math. Phys., 137:461---472, 1991.
[22] K.-H. Fichtner and W. Freudenberg.
Remarks on stochastic calculus on the Fock space.
 In L. Accardi, editor, Quantum Probability and Related Topics, pages 305 -- 323, Singapore, New Jersey, London, Hong Kong, 1991. World Scientific Publishing Co.
[21] K.-H. Fichtner and W. Freudenberg.
Characterization of states of infinite boson systems I. On the construction of states of boson systems.
 Commun. Math. Phys., 137:315---357, 1991.