p-Wave superfluid and phase separation in atomic Bose-Fermi mixture

We consider a system of repulsively interacting Bose-Fermi mixtures of spin polarized uniform atomic gases at zero temperature. We examine possible realization of p-wave superfluidity of fermions due to an effective attractive interaction via density fluctuations of Bose-Einstein condensate within mean-field approximation. We find the ground state of the system by direct energy comparison of p-wave superfluid and phase-separated states, and suggest an occurrence of the p-wave superfluid for a strong boson-fermion interaction regime. We study some signatures in the p-wave superfluid phase, such as anisotropic energy gap and quasi-particle energy in the axial state, that have not been observed in spin unpolarized superfluid of atomic fermions. We also show that a Cooper pair is a tightly bound state like a diatomic molecule in the strong boson-fermion coupling regime and suggest an observable indication of the p-wave superfluid in the real experiment.Comment: 7 pages, 6 figur

Banking in Japan: Will "Too Big To Fail" Prevail?

This paper reviews the evolution of the Japanese banking sector and the development of the banking crisis in Japan in the context of "too big to fail." It describes the deterioration of the Japanese financial sector caused by the bad loan problems and the failure of policymakers to get a grip on the underlying problems. Even at the start of the new century, Japanese policymakers still continue to struggle to find the right policy response to tackle the banking problems and how to avoid moral hazard behavior intertwined with "too big to fail" concerns. The increasing concentration in the Japanese banking industry, which is now dominated by five huge financial conglomerates, should make it more difficult to definitely end "too big to fail" in Japanese prudential policy. In this respect, we believe that the "too big to fail" policy in Japan will prevail.Too big to fail, Banking crisis, Japan

Constraints on color dipole-nucleon cross section from diffractive heavy quarkonium production

We study the hard color dipole-nucleon cross section within perturbative QCD and discuss its relation to observables in diffractive leptoproduction of heavy quarkonium. The dipole cross section calculated with the unintegrated gluon density of the nucleon substantially differs from the well-known perturbative form $\sigma_{dip} \sim b^2$ for $b > 0.3$fm, where $b$ is the transverse separation of the dipole. We show the measured ratio of $\psi '$ to $J / \psi$ photoproduction cross sections constrains the dipole cross section at intermediate $b$, and in fact excludes the simple $\sigma_{dip} \sim b^2$ behavior. We also calculate the $t$-slopes of the diffractive $J / \psi, \psi '$ productions. We emphasize the difference of $t$-slopes, $B_{J/\psi} - B_{\psi '}$, is dominated by the dipole-nucleon dynamics. This difference is found to be about $0.3 {GeV}^{-2}$ with our dipole cross section.Comment: 4 pages, 5 figures, to be published in proceedings of International Workshop on Diffraction in High-Energy Physics (Diffraction2000

Diffusion of water in thermally fractured granite rock cores studied by PFG NMR and MRI: Diffusion of water in thermally fractured granite rock coresstudied by PFG NMR and MRI

Diffusion of water in thermally fractured granite was studied by using pulsed field gradient NMR (PFGNMR) and MRI methods. Two different approaches gave consistent results, indicating that these methods can be applied for materials of low porosity with fracture networks

First-principles method justifying the Dieke diagram and beyond

We present a method to determine the model Hamiltonians to treat rare-earth multiplets in solids from the results of the quasiparticle self-consistent \textit{GW} (QSGW) method. We apply the method to trivalent Eu compounds EuCl$_3$, EuN, and Eu-doped GaN after examining free rare-earth ions. We solve the model Hamiltonian by the exact diagonalization. Our results justify applying the Dieke diagram to ions in solid, while its limitation is clarified. In particular, we show that the crystal fields cause sizable breaking of the Russell-Saunders coupling.Comment: 7 pages, 3 figures, 2 table