量子多體系統

 

我們利用微觀模型探討量子物質的基態、零點相變及動力學。研究量子糾纏 (quantum entanglement) 及量子干涉行為所形成的複雜現象有助於我們進一步瞭解物質世界及探究未來量子電腦的可行性。

Read More


Related Publications

  • Critical quench dynamics of random quantum spin chains: ultra-slow relaxation from initial order and delayed ordering from initial disorder
    New J. Phys 19, 023055 (2016).
  • Non-equilibrium quench dynamics in quantum quasicrystals
    New J. Phys 15, 023036 (2013).
  • Correlated valence-bond states
    Phys. Rev. B 86, 144405 (2012).
  • Entanglement entropy dynamics of disordered quantum spin chains
    Phys. Rev. B 85, 094417 (2012).
    Mentioned in ''The Guardian''
    Selected for the March 2012 issue of Virtual Journal of Quantum Information
  • Definitions of entanglement entropy of spin systems in the valence-bond basis
    Phys. Rev. B 82, 224414 (2010).
    Selected for the December 2010 issue of Virtual Journal of Quantum Information
  • Entanglement entropy with localized and extended interface defects
    Phys. Rev. B 80, 024405 (2009).
    Selected for the July 2009 issue of Virtual Journal of Quantum Information
    Selected for the July 20, 2009 issue of Virtual Journal of Nanoscale Science & Technology
  • Finite-size scaling of the entanglement entropy of the quantum Ising chain with homogeneous, periodically modulated and random couplings
    J. Stat. Mech. P06004 (2008).
  • Entanglement entropy at infinite-randomness fixed points in higher dimensions
    Phys. Rev. Lett. 99, 147202 (2007).
    Selected for the October 2007 issue of Virtual Journal of Quantum Information
    Selected for the October 15, 2007 issue of Virtual Journal of Nanoscale Science & Technology
  • Finite-size scaling of pseudocritical point distributions in the random transverse-field Ising chain
    Phys. Rev. B 76, 064421 (2007).
    Selected for the September 2007 issue of Virtual Journal of Quantum Information

↑Hide

無序系統

 

含雜質或缺陷的晶格物質常和完美的晶格系統有不同的物理性質, 於低溫時或於量子臨界點附近兩者相異性尤其顯著。量子系統中空間裡點狀缺陷對應的是古典(非量子)系統中的線狀缺陷, 這說明了為何無序現象在量子系統中格外明顯。我們探討無序系統的相變問題, 也將結果與其他統計物理的問體, 如極值分佈, 作必較。尋找挫折性無序系統的基態是計算物理中所謂最佳化的問題, 目前我們也進行這方向的研究。

Read More


Related Publications

↑Hide

計算物理

 

統計物理和凝態物理的模型多存在大量自由度, 故常需仰賴計算模擬的方法求解。計算物理的方法也提供跨其他科學領域的途徑。


Read More


Related Publications

↑Hide