منابع مشابه
Spin projection chromatography
We formulate the many-body spin dynamics at high temperature within the non-equilibrium Keldysh formalism. For the simplest XY interaction, analytical expressions in terms of the one particle solutions are obtained for linear and ring configurations. For small rings of even spin number, the group velocities of excitations depend on the parity of the total spin projection. This should enable a d...
متن کاملA projection method for lattice spin systems
Arizona Center for Mathematical Studies, University of Arizona Tucson, Arizona 85721 Institute of Physics, Slovak Academy of Sciences, 84228 Bratislava, Slovak Republic Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306-4130 Center for Materials Research and Technology, Department of Physics, Florida State University, Tallahassee, Florida 32306-4350
متن کاملQuantum projection in an Ising spin liquid.
A transverse magnetic field is used to scan the diagonal and off-diagonal susceptibility of the uniaxial quantum magnet, LiHo(0.045) Y(0.955)F(4). Clusters of strongly coupled spins act as the primary source for the response functions, which result from a field-induced quantum projection of the system into a classically forbidden (meaning non-Ising) regime. Calculations based on spin pairs repr...
متن کاملSuppression of spin projection noise in broadband atomic magnetometry.
We demonstrate that quantum nondemolition measurement, combined with a suitable parameter estimation procedure, can improve the sensitivity of a broadband atomic magnetometer by reducing uncertainty due to spin projection noise. Furthermore, we provide evidence that real-time quantum feedback control offers robustness to classical uncertainties, including shot-to-shot atom number fluctuations, ...
متن کاملSpin projection with double hybrid density functional theory.
A spin projected double-hybrid density functional theory is presented that accounts for different scaling of opposite and same spin terms in the second order correction. This method is applied to three dissociation reactions which in the unprojected formalism exhibit significant spin contamination with higher spin states. This gives rise to a distorted potential surface and can lead to poor geo...
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ژورنال
عنوان ژورنال: Chemical Physics Letters
سال: 2004
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2003.11.104