Yang Xian

Email
yang.xian@manchester.ac.uk

Telephone
+44-(0)161-306-3692

Fax
+44-(0)161-306-4303

Room
Schuster Building 7.14

Address
Dr. Yang Xian
Theoretical Physics Group
School of Physics and Astronomy
The University of Manchester
Manchester M13 9PL, UK

Complete list of publications:

Y. Xian, "Excited states of quantum many-body interacting systems: A variational coupled-cluster description", J. Phys.: Condens. Matter 19, 216221 (2007).
Y. Xian, "A variational coupled-cluster study of plasmonlike excitations in quantum antiferromagnets", Phys. Rev. B 74, 212401 (2006).
Y. Xian, "Diagrammatic approach in the variational coupled-cluster method", Phys. Rev. B 72, 224438 (2005).
Y. Xian, "Extension of the coupled-cluster method: a variational formalism", Phys. Rev. B 66, 2184427-33 (2002).
Y. Xian, "Extension of the coupled-cluster theory", in 150 Years of Quantum Many-body Theory (eds. R.F. Bishop, K.A. Gernoth, and N.R. Walet), World Scientific, Singapore, 107-115 (2001).
R.F. Bishop, R.G. Hale, and Y. Xian, "A microscopic study of the quantum critical behaviours of the spin-1/2 anisotropic-Heisenberg models", Int. J. Quantum Chem. 57, 919-27 (1996).
R.F. Bishop, Y. Xian, and C. Zeng, "A coherent micrscopic approach to quantum criticality: applications to antiferromagnets on square and triangular lattices", in Condensed Matter Theories 11 (eds. E.V. Ludena, P. Vashishta, and R.F. Bishop), Nova, New York, 91 (1996).
Y. Xian, "Rigorous results on a first-order phase transition in antiferromagnetic spin-1/2 coupled chains", Phys. Rev. B 52, 12485-8 (1995).
R.F. Bishop, Y. Xian, and C. Zeng, "A microscopic coupled-cluster treatment of electronic correlations in Hubbard models", Int. J. Quantum Chem. 55, 181-6 (1995).
R.F. Bishop, N.J. Davison, and Y. Xian, "A nonperturbative microscopic theory of Hamiltonian lattice gauge systems", in Recent Progress in Many-body Theories, Vol. 4 (eds. E. Schachinger, H. Mitter, and M. Sormann", Nova, New York, Page 237 (1995).
Y. Xian, "Theory of valence-bond lattice on spin-lattices", in Condensed Matter Theories 10 (eds. M. Casa, M. de Llano, J. Navarro, and A. Polls), Nova, New York, 541-61 (1995).
R.F. Bishop, R.G. Hale, Y. Xian, "Systematic Inclusion of high-order multispin correlations for the spin-1/2 XXZ models", Phys. Rev. Lett. 73, 3157-60 (1994).
Y. Xian, "A microscopic approach to the dimerization in frustrated spin-1/2 antiferromagnetic chains", J. Phys.: Condens. Matter 6, 5965-80 (1994).
R.F. Bishop and Y. Xian, "The coupled-cluster theory of quantum lattice systems", Int. J. of Quantum Chem.: Quantum Chem. Symp. 52, 155 (1994).
R.F. Bishop and Y. Xian, "A many-body approach to Hamiltonian lattice gauge field theories", Nucl. Phys. B (Proc. Suppl.) 34, 808 (1994).
R.F. Bishop and Y. Xian, "A unified many-body theory of Hamiltonian lattice systems", in Condensed Matter Theories, Vol. 9 (eds. J.W. Clark, A. Sadiq, and K.A. Shoaib), Nova, New York, 433 (1994).
Y. Xian, "Exact results of dimerization order parameter in SU(n) antiferromagnetic chains", Phys. Lett. A 183, 437-40 (1993).
Y. Xian, "Spontaneous trimerization of spin-1 chains", J. Phys.: Condens. Matter 5, 7489-502 (1993).
R.F. Bishop and Y. Xian, "A systematic coupled-cluster calculations of the ground state of U(1) lattice gauge models in (1+1) and (2+1) dimensions", Acta Phys. Pol. B 24, 541 (1993).
R.F. Bishop, A.S. Kendall, L.Y. Wong, and Y. Xian, "A coupled-cluster study of Abelian lattice field theories", in Condensed Matter Theory, Vol. 8 (eds. L. Blum and F.B. Malik), Plenum, New York, 269 (1993).
R.F. Bishop, A.S. Kendall, L.Y. Wonf, and Y. Xian, "Correlations in Abelian lattice gauge field model: A microscopic coupled-cluster treatment", Phys. Rev. D 48, 887 (1993).
R.F. Bishop, J.B. Parkinson, and Y. Xian, "The spin-one Heisenberg-biquadratic quantum spin chain treated by the coupled-cluster method", J. Phys.: Conden. Matter 5, 9169-84 (1993).
R.F. Bishop, J.B. Parkinson, and Y. Xian, "Coupled-cluster calculations of quantum XXZ models with a general spin", Phys. Rev. B 46, 880-8 (1992).
R.F. Bishop, J.B. Parkinson, and Y. Xian, "A systematic localized approximation scheme for the coupled-cluster treatment of quantum spin systems", J. Phys.: Conden. Matter 4, 5783-94 (1992).
R.F. Bishop, J.B. Parkinson, Y. Xian, "Correlations in quantum spin chains and lattices: A fully microscopic approach", in Recent Progress in Many-body Theories, Vol. 3 (eds. T.L. Ainsworth, C.E. Campbell, B.E. Clements, and E. Krotscheck), Plenum, New York, 117 (1992).
R.F. Bishop, J.B. Parkinson, and Y. Xian, "Coupled-cluster treatments of correlations in quantum antiferromagnets", Phys. Rev. B 44, 9425-43 (1991).
R.F. Bishop, J.B. Parkinson, Y. Xian, "A coupled-cluster study of the ground-state energy and properties of an anisotropic quantim spin lattice model exhibiting antiferromagnetism in various phases", Theor. Chim. Acta 80, 181 (1991).
R.F. Bishop, J.B. Parkinson, and Y. Xian, "Quantum spin lattice models: A coupled-cluster treatment", in Condensed Matter Theories 6 (eds. S. Fantoni and S. Rosati), Plenum, New York, 37 (1991).
R.F. Bishop, J.B. Parkinson, and Y. Xian, "Many-body correlations in quantum antiferromanets: A microscopic coupled-cluster approach", Phys. Rev. B (Rapid comm.) 43, 13782-5 (1991).
Y. Xian, Ph.D. Thesis: A study of two-dimensional quantum many-body systems, University of Minnesota, USA, 1989.

I am also one of editors for thje following conference proceedings and was involved in organizing such meetings:

Proceedings of the Tenth International Conference on Recent Progress in Many-body Theories, eds. R.F. Bishop, K.A. Gernoth, N.R. Walet, and Y. Xian, World Scientific, Singapore, 2000.
Recent Progress in Many-body Theories - Proceedings of 11th International Conference, eds. R.F. Bishop, T. Brandes, K.A. Gernoth, N.R. Walet, and Y. Xian, World Scientific, Singapore, 2002.

September 2007