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聶斯特 |
James Michael Nester |
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聯絡地址： |
320中壢市中大路300號中央大學物理系 |
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聯絡電話： |
(03)4227157 ext 65322 |
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傳真電話： |
(03)4251175 |
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電子信箱： |
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尤其有興趣於一組由愛因斯坦重力理論推廣的 Poincare 規範理論， 這個理 論中幾何量、曲率和撓率，由質量和自旋造成。我們研究其精確解，與其理 論性質及可觀測的效應。如撓率可以造成可測的長程效應嗎？銀河系動力性質的反常現象是否指出了目前接受的重力理論的缺點？ 對一般的重力理論，我們已發展出一套協變的 Hamiltonian 形式，在其中對 守恆量 ( 總能量，動量，角動量 ) 有新的表示方式。目前尋求一個理想的 「準定域」 (quasi-local) 守恆量密度。 由狄拉克約束 (constraint) 算法可得到 Poincare 規範場論的正則形式， 並給出理論中所有的約束及規範變換。對某些參數值，我們猜測這些理論也 像我們在 teleparallel 理論的研究，會有「約束的條件分裂」現象，對這 個奇特的現象，也將做一般性的研究。 重力的總能為正，這個基本理論要求可作為檢測重力理論的有效的工具。正能量代表重力純是吸引力，任何理論給出斥力解則不能成立；因此我們針對某些理論找這種負能解，許多理論不能符合這項要求。 近來我們找到一個新的轉動規範條件，來選擇理想的正交座標。這些座標與狄拉克方程的解可以相互對應，且有希望成為一個好的重力理論的變量。對 愛因斯坦理論的正能定理，它能給出新的證明以及合理的重力定域能量，對於 Ashtekar 新變量，也能利用它給出簡潔的正能證明及定域能量，我們將 進一步研究這些特殊正交座標。 研究中大量地利用電腦來做代數運算；目前用 REDUCE 加上 EXCALC 及 Zhytnikov 的 GRG ，其他如 Maple 、 Mathematica 及 Macsyma 也會用到 。 我們找到一組新的 " 旋量 - 曲率 " 恆等式，其中兩個分別用在 Witten 形 式的正能證明及我們新的 SU(2) 旋量正能證明。我們將進一步利用這些恆等式及其他旋量方法。 關於特殊相對論的理論和實驗基礎，我們也正進行研究。這些工作部份是與 陳滌清教授，客座專家 V.V. Zhytnikov ，張元仲教授及博士後副研究員 R. Hecht 合作研究。 |
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美國Maryland大學物理學系博士(1977/06)
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1. C.-M. Chen, J. M. Nester and R.-S. Tung, 2005\The Hamiltonian boundary term and quasi-local energy °ux"Phys. Rev. D 72 104020. [arXiv:gr-qc/0508026](SCI) NSC93-2112-M008-021, SC93-2112-M008-001, NSC94-2119-M-002-001. 2. X-n. Wu, C.-M. Chen, J. M. Nester, 2005\Quasilocal energy-momentum and energy °ux at null in‾nity"Phys. Rev. D 71 124010. [arXiv: gr-qc/0505018](SCI) NSC92-2816-M-008-0004-6, SC93-2112-M-008-021, NSC93-2112-M-008-001. 3. J. M. Nester, F. F. Meng and C. M. Chen, 2004\Quasilocal Center-of-Mass"J. Korean Phys. Soc. 45, S22{S25. [arXiv: gr-qc/0403103](SCI) NSC92-2112-M-008-050, NSC92-2119-M-008-024. 4. J. M. Nester, 2004\General pseudotensors and quasilocal quantities"Class. Quantum Grav. 21, S261{S280.(SCI) NSC90-2112-M-008-041, NSC91-2112-M-08-027. 5. H. J. Yo and J. M. Nester, 2002\Hamiltonian Analysis of Poincar¶e Gauge Theory: Higher Spin Modes"Int. J. Mod. Phys. D 11 (2002) 747{779. arXiv:gr-qc/0112030(SCI) NSC90-2112-M-008-041 & NSC90007P. 6. C.M. Chen and J. M. Nester, 2000\A Symplectic Hamiltonian Derivation of Quasilocal Energy-Momentum for GR"Gravitation & Cosmology 6, 257{270.arXiv:gr-qc/0001088(SCI) NSC89-2112-M-008-020.J. M. Nester Recent Publication List 2005-12-15
(B) CONFERENCE PAPERS: 2000{2005 1. J.M. Nester, F.H. Ho and C.M. Chen, 2003\Quasilocal center-of-mass for teleparallel gravity"to appear in MGX proceedings, (World Scienti‾c) arXiv:gr-qc/0403101,NSC92-2112-M-008-050 & NSC92-2119-M-008-024. 2. L.L. So and J.M. Nester, 2003\On source coupling and the teleparallel equivalent to GR"to appear in MGX proceedings, (World Scienti‾c) arXiv:gr-qc/0403101,NSC92-2112-M-008-050. 3. C.M. Chen, J.M. Nester and R.S. Tung, 2003\Spinor Formulations for Gravitational Energy-Momentum"Ch 27 in Cli®ord Algebras: Applications to Mathematics Physics, and Engineering. ed R.Ablamowicz, (Birkhauser,2004), pp 417{430.arXiv:gr-qc/0209100,NSC90-2112-M-008-041, NSC90-2112-M-002-055. 4. R. S. Tung and J. M. Nester, 2002\Gravitational Energy Momentum in the Tetrad and Quadratic Spinor Representations ofGeneral Relativity"in Gravitation and Cosmology: From the Hubble Radius to the Planck Scale: Proceedings inHonor of the 80th Birthday of Jean-Pierre Vigier (Fundamental Theories of Physics, Vol 126(Kluwer Academic, 2002), ed by R. L. Amoroso, G. Hunter, M. Mafatos and J. P. Vigier,arXiv:gr-qc/001001. 5. J. M. Nester, C.-M. Chen and Y.-H. Wu, 2002\Gravitational energy-momentum in MAG"in Proceedings of the 9th Marcel Grossman Meeting on General Relativityed V. G. Gurzadyan, R. T. Jantzen and R. Ru±ni (World Scienti‾c, Singapore), pp 1045{6,arXiv/gr-qc/0011101,NSC89-2112-M-008-020. 6. R. S. Tung and J. M. Nester, 2002\The Quadratic Spinor Lagrangian, GRjj and the Localization of Energy-Momentum and An-gular Momemtum" in Proceedings of the 9th Marcel Grossman Meeting on General Relativityed V. G. Gurzadyan, R. T. Jantzen and R. Ru±ni (World Scienti‾c, Singapore), pp 1049-50,arXiv:gr-qc0011101. 7. C.-C. Chang, J. M. Nester and C.-M. Chen, 2000\Energy-Momentum (Quasi-) Localization for Gravitating Systems"in Gravitation and Astrophysicsed Liao Liu, Jun Luo, X.-Z. Li, J. P. Hsu (World Scienti‾c, Singapore), pp 163{173,arXiv:gr-qc/9912058,NSC89-2112-M-008-020 & NSC89-2112-M-008-016.J. M. Nester Recent Publication List 2005-12-15
(C) OTHER PUBLICATIONS: 2000{2005 1. C.-M. Chen and J.M. Nester, 2005\Gravitational Interaction and Energy" (article in Chinese)Chinese Physics Bimonthly 27 No. 61. J.M. Nester, L.L. So and C.M. Chen, 2005 [abstract]\A preferred quasilocal expression for gravitational energy-momentum"Chinese Physics Society Bimonthly 27, 139. 2. L.L. So, H. Chen, J.M. Nester and C.M. Chen, 2005 [abstract]\Small region values for classical pseudotensors and our quasilocal expressions"Chinese Physics Society Bimonthly 27, 147. 3. J.M. Nester, 2005 [abstract]\Well Adapted frames" (poster)Chinese Physics Society Bimonthly 27, 253. 4. J.M. Nester, 2005 [abstract]\One spinor ‾eld zeros and the existence of special orthonormal frames" (poster)Chinese Physics Society Bimonthly 27, 253. 5. J.M. Nester, 2005 [abstract]\Riemann normal coordinates: a complete accounting" (poster)Chinese Physics Society Bimonthly 27, 253. 6. G. Sun, J.M. Nester, C.M. Chen, X.J. Li, H. Chen, F.H. Ho, J.L. Liu, M.F. Wu, K.F. Shie,and L.L. So, 2005 [abstract]\Small region angular momentum for pseudotensors and our quasilocal expressions" (poster)Chinese Physics Society Bimonthly 27, 252. 7. J.M. Nester, C.M. Chen and R.S. Tung, 2004 [abstract]\Quasilocal energy °ux"(poster)GR17 book of abstracts, 64. 8. C.M. Chen, J.M. Nester, L.L. So and T. Vrgas, 2004 [abstract]\Quasilocal energy of Bianchi space" (poster)GR17 book of abstracts, 59 9. L.L. So and James M. Nester, 2004 [abstract]\Quasilocal quantities for small regions"GR17 book of abstracts, 52. 10. J.M. Nester, C.M. Chen and R.S. Tung (2004) [abstract]\Quasilocal energy °ux", Chinese Physics Society Bimonthly 26, 169. 11. L.L. So, C.M. Chen, J.M. Nester and T. Vargas Auccalla (2004) [abstract]\Quasilocal Energy of Teleparallel Bianchi Spaces",Chinese Physics Society Bimonthly 26, 169 . 12. K. Sun, Hsin Chen, L.L. So, X.J. Li , C.M. Chen andJ.M. Nester (2004) [abstract]\Quasilocal quantities for small regions", (poster)Chinese Physics Society Bimonthly 26, 282. 13. J.M. Nester, C.M. Chen and R.S. Tung (2003) [abstract]\Spinor formulations for quasilocal angular momentum"Chinese Physics Society Bimonthly 25 99. 14. J.M. Nester (2003) [abstract]\On spinor connections with non-metricity", (poster)Chinese Physics Society Bimonthly 25, 232.J. M. Nester Recent Publication List 2005-12-15 15. Y.K. Lin, T.L. Chong, S.N. Liang and J.M. Nester (2003) [abstract]\Geometric algebra, di®erential forms, tensor algebra and Cli®orms; translation and physicalapplications", (poster)Chinese Physics Society Bimonthly 25, 231. 16. R.S. Tung and J.M. Nester (2003) [abstract]\Some formal relations between quadratic spinor Lagrangians and Supergravity", (poster)Chinese Physics Society Bimonthly 25, 233. 17. J.M. Nester (2003) [abstract]\On spinor ‾eld zeros and special triads"(poster)Chinese Physics Society Bimonthly 25, 233. 18. J.M. Nester, C.M. Chen and R.S. Tung (2002) [abstract]\Quasilocal energy-momentum: spinor formulations",Chinese Physics Society Bimonthly 24, 67. 19. L.L. So, C.M. Chen and J. M. Nester (2002) [abstract]\Teleparallel gravity source coupling",Chinese Physics Society Bimonthly 24, 67 20. T.L. Chong, S.N. Liang, Y.K. Lin and J.M. Nester (2002) [abstract]\Geometric algebra and calculus (I): a promising tool", (poster)Chinese Physics Society Bimonthly 24, 238. 21. Y.K. Lin, T.L. Chong, S.N. Liang and J.M. Nester (2002) [abstract]\Geometric algebra and calculus (II): some challanging applications", (poster)Chinese Physics Society Bimonthly 24, 238. 22. F.H. Ho, C.M. Chen and J.M. Nester (2002) [abstract]\Quasilocal center of mass for teleparallel gravity", (poster)Chinese Physics Society Bimonthly 24, 244. 23. F.F. Meng, C.M. Chen and J.M. Nester (2002) [abstract]\Quasilocal center of mass for GR", (poster)Chinese Physics Society Bimonthly 24, 241. 24. J.M. Nester, K.H. Vu, C.C. Chang and C.M. Chen (2001) [abstract]\Quasilocal energy-momentum & angular momentum for teleparallel gravity" (poster)Chinese Physics Society Bimonthly 23, 25. Y.K. Lin, C.Y. Hing and J.M. Nester (2001) [abstract]\Numerical calculation of special orthonormal frames and quasilocal energy for Brill wave plusblack hole initial data" (poster)Chinese Physics Society Bimonthly 23, 26. Y.H. Wu, C. M. Chen and J.M. Nester (2001) [abstract]\Quasilocal energy-momentum in Metric A±ne Gravity" (poster)Chinese Physics Society Bimonthly 23, 27. J.M. Nester and C.-M. Chen, 2000 [abstract]\Some new observations re Hamiltonian boundary terms, quasilocal energy-momentum andpseudotensors"Chinese Physical Society Bimonthly 22, 109.
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