Effect in the Normal StateCorrelationEof a Dipolar Fermi GasLanYinSchool of Physics, Peking UniversityCollaborator:BoLiu
Correlation Effect in the Normal State of a Dipolar Fermi Gas Lan Yin School of Physics, Peking University Collaborator: Bo Liu
Outline(1) Introduction(2) Correlationenergy(3)Lifetimeofquasi-particles(4) Conclusion
Outline (1) Introduction (2) Correlation energy (3) Lifetime of quasi-particles (4) Conclusion
(1) IntroductionCreating 87Rb40K polar molecules (JILA)2Electric dipole:4S+5P232/0)=(V=10)100.052(2) Debye (Triplet groundstate)(,L) 0.566(17) Debye (Singlet)Q2(998nm)21(1023nm60.4Density~1012 cm-30.2[i)=FeshbachMolecules0.04S+5STemperature~2T,a'-0.2XI2lg) = (v =5151020InternuclearSeparation(a.)Stimulated Ramanadiabaticpassage
Creating 87Rb40K polar molecules (JILA) (1) Introduction Stimulated Raman adiabatic passage Electric dipole: 0.052(2) Debye (Triplet ground state) 0.566(17) Debye (Singlet) Density~1012 cm-3 Temperature~2TF
Dipole-Dipoleinteraction(Long-range and anisotropic)[DA -DB - 3(DAe,)(e DB))VadConsequences:1) Anisotropic self-energy and Fermi surfaceVariational result f(k) = (-=(2 +) -a2k21 md(3.cos(0) - 1)Low-density limit k(0)=kp+起9元(T. Miyakawa, T. sogo, H. Pu; S. Ronen, J. Bohn; J.-N. Zhang, S. Yi...)
Dipole-Dipole interaction ( Long-range and anisotropic ) Consequences: 1) Anisotropic self-energy and Fermi surface Variational result Low-density limit (T. Miyakawa, T. sogo, H. Pu; S. Ronen, J. Bohn; J.-N. Zhang, S. Yi.)
(2) Critical density of mechanical collapse3unstable10321uo10中stableonNPPo)unstable010-1stableunstable-210°10-11001011001010入N1/6cdPo入三W/W1EdCdd =d2/(ah.h) Bo = (wr/we)2/3a3hwCd=nd/(4元E0)(T. Miyakawa, T. sogo, H. Pu)(J.-N. Zhang, S. Yi)(3) P-wave superfluid and other novel states
(2) Critical density of mechanical collapse (3) P-wave superfluid and other novel states. (T. Miyakawa, T. sogo, H. Pu) (J.-N. Zhang, S. Yi)