Zhang Jian-Zu
Ph. D
Professor
mentor of Doctors
Research interests:Theoretical Physics
Email:jzzhang@ecust.edu.cn
Achievements:
Quantum theories at unusual conditions with high symmetries have been investigated systematically, including quantum theories in non-commutative space, supersymmetric quantum theories, q-deformed quantum theories and dynamics of charged monopole－fermion bound system, etc.. Their unusual properties were explored and low energy relics, which can be tested by experiments at current energy scale, were revealed. In literature characteristics of our research are remarkable in the related fields.
Representative work includes 32 papers. The average impact factor of these papers is larger than 5.1.
1.Quantum Theories in Non-Commutative Space
1) A testable effect of quantum theories in non-commutative space was explored (Physical Review Letters, 93 (2004) 043002)
In special limits allowed by spatial non-commutativity the lowest angular momenta of Rydberg atoms in appropriate crossed electric and magnetic fields take unusual values. It is a unique clear signal of spatial non-commutativity which can be tested, up to now in literature, by experiments at current energy scale. This result has attracted attention of the international physical community. An international group projected a special experiment to test this result. The experiment is progressing.
2) A new type of deformed bosonic commutators was explored for the first time (Physics Letters, B584 (2004) 204). This result established the consistent complete deformed bosonic algebra which corrected the incompleteness of the deformed bosonic algebra in literature.
3) The un-equivalency theorem between the deformed Heisenberg-Weyl
algebra in noncommutative space and the undeformed one in commutative space was proven (Physics Letters, B639 (2006) 403). It elucidated an extensively tacit misunderstanding about equivalency between the deformed and the undeformed Heisenberg-Weyl algebras in literature
2. Supersymmetric Quantum Theories
1) The semiunitary framework of supersymmetric quantum mechanics was
established, with co-operators, for the first time. It shows obvious advantages than the traditional framework used in literature. It covers not only all results obtained in the traditional framework but also can solve problems which are difficult to treat by the traditional one.
2) The semiunitary framework was applied to study superpartners of Rydberg atoms in appropriate crossed electric and magnetic fields, and discovered that in special limits their lowest angular momenta take unusual values (Physical Review Letters, 77 (1976) 44). This reveals a clear signal of supersymmetric quantum mechanics which can be tested by current experiments.
3. Deformed Quantum Theories
1) The general perturbation equivalency theorem of deformed dynamics was proven (Physics Letters, B517 (2001) 210). This theorem establishes a reliable foundation of the perturbation calculations in deformed dynamics.
2) The under-cutting lemma of the deformed uncertainty relation was proven (Physics Letters, B440 (1998) 66). Under the guide of this lemma
a critical squeezing phenomenon in deformed quantum optics was explored. It shows the essential new future of deformed quantum theories which can be verified, for the first time, by experiments of quantum optics.
4. Dynamics of Charged Monopole—Fermion Bound Systems (Physics Letters, B532 (2002) 215)
1) The parity violation electric dipole transitions for the charged monopole—fermion bound systems were revealed. The experimental confirmation of this process will be a signal of existence of monopoles
2) A new singularity for the charged monopole—fermion bound systems were explored for the first time. A scheme of solving this difficulty was proposed which laid a foundation of the consistency dynamics of this system.
3) A series unusual characteristics of this system wereexplored. Based on these observations new principles and new methods of searching for charged monopoles in the bound state conditions were proposed. These new methods possess obvious advantages which can avoid difficulties in the traditional methods of searching for free monopoles.
Awards:
Representative work includes 32 papers. Their average impact factor is larger than 5.1（The number in the bracket is the impact factor of the journal, cited from 2006 Science Citation Index, Journal of Citation Reports, in the Institute for Scientific Information Database）：
1 (7.072) Jian-zu Zhang, Testing Spatial Noncommutativity via Rydberg Atoms, Physical Review Letters, 93 (2004) 043002.
2 (7.072) Jian-zu Zhang, Angular Momentum of Supersymmetric Cold Rydberg Atoms, Physical Review Letters, 77 (1996) 44.
3 (4.896) Jian-zu Zhang, Searching for Effects of Spatial Noncommutativity via a Chern-Simons Process, Physical Review, D74 (2006) 124005.
4(5.043) Jian-zu Zhang, Un-equivalency Theorem between Deformed andUndeformed Heisenberg-Weyl`s Algebras, Physics Letters, B639 (2006) 403.
5(5.043) Qi-Jun Yin, Jian-zu Zhang, Coherent States Of Deformed Heisenberg-Weyl Algebra in Non-commutative Spaces, Physics Letters, B613 (2005) 91.
6(5.043) Jian-zu Zhang, Deformed Two-Photon Squeezed States in Non-commutative Spaces, Physics Letters, B597 (2004) 362.
7(5.043) Jian-zu Zhang, Fractional Angular Momentum in Non-commutative Spaces, Physics Letters, B584 (2004) 204.
8(5.043) Jian-zu Zhang, Structures of q-deformed Currents, Physics Letters, B554 (2003) 223.
9(5.043) Jian-zu Zhang, q-deformed Dynamics and Virial Theorem, Physics Letters, B539 (2002) 162.
10 (5.043) Jian-zu Zhang, Testing Abelian Dyon-Fermion Bound System, Physics Letters, B532 (2002) 215.
11(5.043) Jian-zu Zhang, Perturbative Equivalent Theorem in q-deformed Dynamics, Physics Letters, B517 (2001) 210.
12 (5.393) H. J. W. Müller-Kirsten, Jian-zu Zhang, Yunbo Zhang, Once Again: Instanton Method vs. WKB, Jurnal of High Energy Physic, 0111, 011 (2001) 1-8.
13 5.199) D. K. Park, S. N. Tamaryan, H. J. W. Müller-Kirsten, Jian-zu Zhang, D-Branes and Their Absorptivity in Born-Infeld Theory, Nuclear Physics, B594 (2001) 243.
14 (5.043) Jian-zu Zhang, Spectrum of q-deformed Schrodinger Equation, Physics Letters, B477 (2000) 361.
15 (5.043) Jian-zu Zhang, A q-Deformed Quantum Mechanics, Physics Letters, B440 (1998) 66.
16 (4.896) H. J. W. Müller-Kirsten, Jian-zu Zhang, Collective Coordinates and BRST Symmetry, Physical Review, D50 (1994) 6531.
17 (5.043) H. J. W. Müller-Kirsten, Jian-zu Zhang, On the Consistency of BRST Gauge Fixing of Constrained Systems, Physics Letters, B339 (1994) 65.
18 (5.043) Xin-zhou Li, Jian-zu Zhang, The Solutions of the Cosmic String Loop Equation in an Expanding Universe, Physics Letters, B312 (1993) 62.
19 (4.896) Xin-zhou Li, Jian-zu Zhang, Effective Couplings of Axigluons and Technicolor Pseudo Goldstone Bosons, Physical Review, D46 (1992) 5092.
20 (4.896) Xin-zhou Li, Jian-zu Zhang, Superconducting Strings from Heterotic Superstring, Physical Review, D45 (1992) 2888.
21(4.896) Xin-zhou Li, Xin Shi, Jian-zu Zhang, Generalized Riemann ζ-functionRegularization and Casimir Energy for a Piecewise Uniform String, Physical Review, D44 (1991) 560.
22 (4.896) Jian-zu Zhang, Axigluon Mass, Physical Review D43 (1991) 214.
23 (4.896) Jian-zu Zhang, Axigluons and Monojets, Physical Review, D42 (1990) 1455.
24(4.896) Jian-zu Zhang, Parity-Violating Effects of the Bound System of a Charged Fermion and an Abelian Dyon with Charge and for J>|q|+1/2, Physical Review, D41 (1990) 1280.
25 (4.896) P. H. Frampton, Jian-zu Zhang, Yong-chang Qi, Analysis of Bound States of Charged Fermion and Abelian Dyon, Physical Review, D40 (1989) 3533.
26(4.896) Jian-zu Zhang, Wess-Zumino-Type Effective Action for Technions with Light Gauge Bosons in a Chiral-Anomaly Technicolor Model, Physical Review, D39 (1989) 354.
27(5.043) Jian-zu Zhang, The Wess-Zumino Type Effective Action in the TechnicolorScheme and the Technion Production at , Physics Letters,B195 (1987) 495.
28 (4.896) Xin-zhou Li, Feng Yu, Jian-zu Zhang, Generalized Monopoles in（4+K）-Dimensional Abelian Theories , Physical Review, D34 (1986) 1124.
29 (4.896) Xin-zhou Li, Jian-zu Zhang, Hydrogen Like Structure of Bound-State Energy for a Fermion and a Dirac Dyon with Charge and for J>|q|+1/2, Physical Review D33 (1986) 562.
30 (5.043) Xin-zhou Li, Ke-lin Wang, Jian-zu Zhang, The Singularity States of the System of a Fermion and a Dirac Dyon, Physics Letters, B148 (1984) 89.
31 (5.043) Xin-zhou Li, Ke-lin Wang, Jian-zu Zhang, On the SO(10) Monopole, Physics Letters, B140 (1984) 209.
32 (5.043) Jian-zu Zhang, The Unified BS Wavefunctions of Mesons with Natural , Physics Letters, B112 (1982) 165.
