The ground state phase diagrams and low-energy excitation of dimer XXZ spin ladder

2014 ◽  
Vol 64 ◽  
pp. 188-194 ◽  
Author(s):  
Qi-Hui Chen ◽  
Long-Fei Guo ◽  
Peng Li
Keyword(s):  
Phase Diagrams ◽  
Ground State ◽  
Low Energy ◽  
Spin Ladder ◽  
Energy Excitation

scholarly journals The excitation spectrum of the Bose gas in the Gross–Pitaevskii regime

2020 ◽  
pp. 2060006
Author(s):  
Chiara Boccato
Keyword(s):  
Excitation Spectrum ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Bose Gas ◽  
Low Energy ◽  
Side Length ◽  
Joint Work ◽  
Energy Excitation

We consider a gas of interacting bosons trapped in a box of side length one in the Gross–Pitaevskii limit. We review the proof of the validity of Bogoliubov’s prediction for the ground state energy and the low-energy excitation spectrum. This note is based on joint work with C. Brennecke, S. Cenatiempo and B. Schlein.

Low-energy excitation spectra of the system KY(MoO4)2-KEr(MoO4)2

1996 ◽  
Vol 46 (S5) ◽  
pp. 2687-2688
Author(s):  
Vladimir I. Kut'ko ◽  
Nina M. Nesterenko ◽  
Yuriy N. Kharchenko
Keyword(s):  
Low Energy ◽  
Excitation Spectra ◽  
Energy Excitation

Low-Energy Excitation in β-Cu2Se

1989 ◽  
Vol 58 (9) ◽  
pp. 3061-3064 ◽  
Author(s):  
Takashi Sakuma ◽  
Kaoru Shibata
Keyword(s):  
Low Energy ◽  
Energy Excitation

Quantum chemical studies in the design of organic metals. III. Odd-alternant hydrocarbons - The phenalenyl (ply) system

1975 ◽  
Vol 28 (11) ◽  
pp. 2343 ◽  
Author(s):  
RC Haddon
Keyword(s):  
Electronic Structure ◽  
Structural Change ◽  
Ground State ◽  
Quantum Chemical ◽  
Low Energy ◽  
Organic Metals ◽  
Chemical Studies ◽  
Quantum Chemical Studies ◽  
Alternant Hydrocarbons ◽  
Equilibrium Geometries

The MINDO/3 SCF MO method has been used to investigate the equilibrium geometries, electronic structure and ground state properties of ply and its univalent ions. The results indicate that ply has a low energy of disproportionation and that electron addition or removal leads to little structural change. From an analysis of the results it is concluded that odd-alternant hydrocarbons, and systems based on the ply nucleus in particular, have many of the characteristics which are considered to be important in the design of organic metals and superconductors.

THE GROUND-STATE PHASE DIAGRAMS OF THE SPIN-2 ISING MODEL

2007 ◽  
Vol 21 (31) ◽  
pp. 5265-5274 ◽  
Author(s):  
AHMET ERDİNÇ
Keyword(s):  
Magnetic Field ◽  
Ising Model ◽  
External Magnetic Field ◽  
Phase Diagrams ◽  
Crystal Field ◽  
Ground State ◽  
Exchange Interactions ◽  
Nearest Neighbors ◽  
Biquadratic Exchange ◽  
Model Hamiltonian

The ground-state phase diagrams are obtained for the spin-2 Ising model Hamiltonian with bilinear and biquadratic exchange interactions and a single-ion crystal field. The interactions are assumed to be only between nearest-neighbors. Obtained phase diagrams are presented in the (Δ,J), (K,J), (Δ/J,K/J), (Δ/|J|,K/|J|), (Δ/|K|,J/|K|), (H/J,Δ/J), (H/|J|,Δ/|J|), (H/J,K/J), and (H/|J|,K/|J|) planes where J, K, Δ, and H are the bilinear, biquadratic exchange interactions, the single-ion crystal field, and the external magnetic field, respectively. The influence of the external magnetic field on the spin configurations is investigated.

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