منابع مشابه
Ground State EntanglementEnergetics
We consider the ground state of simple quantum systems coupled to an environment. In general the system is entangled with its environment. As a consequence, even at zero temperature, the energy of the system is not sharp: a projective measurement can find the system in an excited state. We show that energy fluctuation measurements at zero temperature provide entanglement information. For two-st...
متن کاملGround State Electroluminescence.
Electroluminescence, the emission of light in the presence of an electric current, provides information on the allowed electronic transitions of a given system. It is commonly used to investigate the physics of strongly coupled light-matter systems, whose eigenfrequencies are split by the strong coupling with the photonic field of a cavity. Here we show that, together with the usual electrolumi...
متن کاملGround - state spins and moments
E. Mané,1 B. Cheal,1,* J. Billowes,1 M. L. Bissell,2 K. Blaum,3 F. C. Charlwood,1 K. T. Flanagan,4 D. H. Forest,5 Ch. Geppert,6,7 M. Kowalska,8,3 A. Krieger,7 J. Krämer,7 I. D. Moore,9,10 R. Neugart,7 G. Neyens,2 W. Nörtershäuser,6,7 M. M. Rajabali,2 R. Sánchez,6 M. Schug,3 H. H. Stroke,11 P. Vingerhoets,2 D. T. Yordanov,3 and M. Žáková7 1School of Physics and Astronomy, The University of Manch...
متن کاملTHE GROUND STATE OF NaV2O5
Neutron and X-ray diffraction experiments have shown that NaV2O5 consists of zig-zag V chains of average valence 4.5 rather than a charge ordered state at room temperature. Both these experiments revealed superlattice reflections below the phase transition temperature TSP < 34 K. The modulation below TSP is due to displacements predominantly of V atoms for which we propose a model. q 1998 Elsev...
متن کاملMagnetic ground state of FeSe
Elucidating the nature of the magnetism of a high-temperature superconductor is crucial for establishing its pairing mechanism. The parent compounds of the cuprate and iron-pnictide superconductors exhibit Néel and stripe magnetic order, respectively. However, FeSe, the structurally simplest iron-based superconductor, shows nematic order (Ts=90 K), but not magnetic order in the parent phase, an...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1971
ISSN: 0033-068X
DOI: 10.1143/ptp.45.1786