The microscopic theory of the blue phases of chiral liquid crystal is proposed. Beginning with the potential between two molecules, by using the cell model of liquid, applying statistical physical method, the distribu...The microscopic theory of the blue phases of chiral liquid crystal is proposed. Beginning with the potential between two molecules, by using the cell model of liquid, applying statistical physical method, the distribution function and the free energy of the system are obtained. By using variational approach and zero-order approximation, the differential equation that the order parameter tensor of the blue phase can satisfy is obtained. Then we change the differential equation to the eigenequation problem in quantum mechanics. Considering the symmetry of the blue phases,the order parameter tensors of blue phases Ⅰ and Ⅱ can be made up of the eigenvectors. Our results are the same as the results of Ginzberg-Landau's phenomenological theory. The parameters in the order parameter tensors that we calculate in the located system are close to the predecessors' results.展开更多
Prof.SUN Changpu from the CAS Institute of Theoretical Physics and co- workers from University of Basel in Switzerland have worked out a way—at least in theory—to split a beam of molecules according to their chirali...Prof.SUN Changpu from the CAS Institute of Theoretical Physics and co- workers from University of Basel in Switzerland have worked out a way—at least in theory—to split a beam of molecules according to their chirality.The technique involves passing the molecules through three different laser beams and is similar to the famous Stern- Gerlach effect,whereby a beam of atoms passing through a展开更多
Integrated two particle correlation functions have been extracted from charge particle multiplicity density fluctuations in pseudorapidity space by analyzing Au+Au collision events at S_(NN)^(1/2)=200GeV taken by RHIC...Integrated two particle correlation functions have been extracted from charge particle multiplicity density fluctuations in pseudorapidity space by analyzing Au+Au collision events at S_(NN)^(1/2)=200GeV taken by RHIC-PHENIX.The correlation lengths as a function of the number of participants N_p indicate a non monotonic increase at around N_p=100 and the corresponding energy density based on the Bjorken picture isε_(Bj)τ～2.SGeV·fm^(-2).This could be a symptom of a critical behavior.展开更多
文摘The microscopic theory of the blue phases of chiral liquid crystal is proposed. Beginning with the potential between two molecules, by using the cell model of liquid, applying statistical physical method, the distribution function and the free energy of the system are obtained. By using variational approach and zero-order approximation, the differential equation that the order parameter tensor of the blue phase can satisfy is obtained. Then we change the differential equation to the eigenequation problem in quantum mechanics. Considering the symmetry of the blue phases,the order parameter tensors of blue phases Ⅰ and Ⅱ can be made up of the eigenvectors. Our results are the same as the results of Ginzberg-Landau's phenomenological theory. The parameters in the order parameter tensors that we calculate in the located system are close to the predecessors' results.
文摘Prof.SUN Changpu from the CAS Institute of Theoretical Physics and co- workers from University of Basel in Switzerland have worked out a way—at least in theory—to split a beam of molecules according to their chirality.The technique involves passing the molecules through three different laser beams and is similar to the famous Stern- Gerlach effect,whereby a beam of atoms passing through a
文摘Integrated two particle correlation functions have been extracted from charge particle multiplicity density fluctuations in pseudorapidity space by analyzing Au+Au collision events at S_(NN)^(1/2)=200GeV taken by RHIC-PHENIX.The correlation lengths as a function of the number of participants N_p indicate a non monotonic increase at around N_p=100 and the corresponding energy density based on the Bjorken picture isε_(Bj)τ～2.SGeV·fm^(-2).This could be a symptom of a critical behavior.
