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Physicists find first possible 3D quantum spin liquid（图）
Physicists 3D quantum spin liquid
2019/10/23
There's no known way to prove a 3D "quantum spin liquid" exists, so Rice University physicists and their collaborators did the next best thing. They showed that single crystals of cerium zirconium pyr...
Effective Hamiltonian in the Problem of a "Central Spin" Coupled to a Spin Environment
Spin quantum interactive microcosmic spin micro rotation magnetic particles low-energy properties model
2014/12/23
We consider here the problem of a "giant spin", with spin quantum number S≫1, interacting with a set of microscopic spins. Interactions between the microscopic spins are ignored. This model desc...
Systematic 1/M expansion for spin 3/2 particles in baryon chiral perturbation theory
The theory of relativity pion - nucleon - delta system spin 3/2 resonance nuclear soft power the quality of meson
2014/12/22
Starting from a relativistic formulation of the pion-nucleon-delta system, the most general structure of 1/M corrections for a heavy baryon chiral lagrangian including spin 3/2 resonances is given. Th...
Compton scattering and the spin structure of the nucleon at low energies
Compton scattering nuclear scattering the photon energy electron volts baryon chiral perturbation theory
2014/12/22
We analyze polarized Compton scattering which provides information on the spin-structure of the nucleon. For scattering processes with photon energies up to 100 MeV the spin-structure dependence can b...
BPS force balances via spin-spin interactions
BPS soliton static force balance spin quantum mechanics micro sub zero gravity field model
2014/12/22
We study two systems of BPS solitons in which spin-spin interactions are important in establishing the force balances which allow static, multi-soliton solutions to exist. Solitons in the Israel-Wilso...
Spin of the M2-brane and spin-spin interactions via probe techniques
Solitary wave rotate super gravity quantitative fermionic zero mode
2014/12/22
The 256-dimensional M2-brane multiplet contains solitons of many different intrinsic spins. Using the broken supersymmetry transformations of the M2-brane, we find supergravity solutions which explici...
Theory of the spin bath
Mesoscopic and macroscopic system quantum dynamics coupling model the oscillator
2014/12/22
The quantum dynamics of mesoscopic or macroscopic systems is always complicated by their coupling to many `environmental' modes. At low T these environmental effects are dominated by localized modes, ...
Spin bath-mediated decoherence in superconductors
Squid tunnel paramagnetic nuclear spin electronic excited state isotope purification
2014/12/22
We consider a SQUID tunneling between 2 nearly degenerate flux states. Decoherence caused by paramagnetic and nuclear spins in the low-T limit is shown to be much stronger than that from electronic ex...
GDH2000 Convenor’s Report: Spin Polarizabilities
Low energy polarization protons Compton scattering
2014/12/22
The subject of low energy polarized Compton scattering from the proton, which is characterized by phenomenological spin-polarizabilities, is introduced and connection is made to new theoretical and ex...
Single-hole spectral function and spin-charge separation in the t-J model
Worm hole green's function monte carlo simulation spectral analysis spectral function thermodynamics
2014/12/22
Worm algorithm Monte Carlo simulations of the hole Green function with subsequent spectral analysis were performed for 0.1<~J/t<~0.4 on lattices with up to L×L=32×32 sites at a temperature as low as T...
Frustrated Spin Model as a Hard-Sphere Liquid
D topology antiferromagnetic ising model triangle lattice hard sphere fluid to the quantum spin dynamics
2014/12/20
We show that one-dimensional topological objects (kinks) are natural degrees of freedom for an antiferromagnetic Ising model on a triangular lattice. Its ground states and the coexistence of spin orde...
New evidence for zero-temperature relaxation in a spin-polarized Fermi liquid
The experiment report parameters and coefficients
2014/12/20
Spin-echo experiments are reported for 3He-4He solutions under extremely high B/T conditions, B=14.75 T and T≥1.73 mK. The 3He concentration x3 was adjusted close to the valu...
Landau damping of spin waves in trapped Boltzmann gases
Ultracold gas boltzmann spatial dependence
2014/12/20
A semiclassical method is used to study Landau damping of transverse pseudo-spin waves in harmonically trapped ultracold gases in the collisionless Boltzmann limit. In this approach, the time evolutio...
Anisotropic spin diffusion in trapped Boltzmann gases
Trapped bose gas mixture dynamics grain boltzmann constant
2014/12/20
Recent experiments in a mixture of two hyperfine states of trapped Bose gases show behavior analogous to a spin-1/2 system, including transverse spin waves and other familiar Leggett-Rice-type effects...
Spin diffusion in trapped gases: Anisotropy in dipole and quadrupole modes
Trapped bose gas mixture dynamics grain spin wave frequency
2014/12/20
Recent experiments in a mixture of two hyperfine states of trapped Bose gases show behavior analogous to a spin-1/2 system, including transverse spin waves and other familiar Leggett-Rice-type effects...