素粒子論研究

Spin dynamics on S=1/2 spin chains in a magnetic field(Fundamental Problems and Applications of Quantum Field Theory)

Mitsuhiro Arikawa

Published Apr 20, 2006• 0 citations

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素粒子論研究

Spin dynamics on S=1/2 spin chains in a magnetic field(Fundamental Problems and Applications of Quantum Field Theory)

Mitsuhiro Arikawa

Published Apr 20, 2006• 0 citations

OpenAlex

Related papers

Spin dynamics on S=1/2 spin chains in a magnetic field

Mitsuhiro Arikawa

素粒子論研究Jan 1, 20060 citations

Application of Modified Spin Wave Theory to Ferromagnetic Spin Chain with Arbitrary Range Interactions (Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

Makoto Kaburagi, Takashi Hashimoto, Min Gu Kang +1 more

Progress of Theoretical PhysicsJan 1, 20050 citations

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Dynamical correlations of the spin- 12 Heisenberg XXZ chain in a staggered field

Igor Kuzmenko, Fabian H. L. Eßler

We consider the easy-plane anisotropic spin- $\frac{1}{2}$ Heisenberg chain in combined uniform longitudinal and transverse staggered magnetic fields. The low-energy limit of his model is described by the sine-Gordon quantum field theory. Using methods of integrable quantum field theory we determine the various components of the dynamical structure factor. To do so, we derive explicit expressions for all matrix elements of the low-energy projections of the spin operators involving at most two particles. We discuss applications of our results to experiments on one-dimensional quantum magnets.We consider the easy-plane anisotropic spin-$\frac{1}{2}$ Heisenberg chain in combined uniform longitudinal and transverse staggered magnetic fields. The low-energy limit of his model is described by the sine-Gordon quantum field theory. Using methods of integrable quantum field theory we determine the various components of the dynamical structure factor. To do so, we derive explicit expressions for all matrix elements of the low-energy projections of the spin operators involving at most two particles. We discuss applications of our results to experiments on one-dimensional quantum magnets.

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Bruce Normand, Christian Rüegg

The discovery of the almost ideal, two-chain spin-ladder material (C ${}_{5}$ H ${}_{12}$ N) ${}_{2}$ CuBr ${}_{4}$ has once again focused attention on this most fundamental problem in low-dimensional quantum magnetism. With experimental data now available at all temperatures and magnetic fields, a correspondingly systematic theoretical description is required. This is obtained for the gapped regime within the bond-operator framework, by implementing three qualitative advances that account for triplet correlation effects, their evolution in a field, and the magnetization induced when both field and temperature are finite. Quantitative and parameter-free results are presented as experimental comparisons with the measured specific heat and as predictions for thermal renormalization of the triplet magnon excitations.The discovery of the almost ideal, two-chain spin-ladder material (C${}_{5}$H${}_{12}$N)${}_{2}$CuBr${}_{4}$ has once again focused attention on this most fundamental problem in low-dimensional quantum magnetism. With experimental data now available at all temperatures and magnetic fields, a correspondingly systematic theoretical description is required. This is obtained for the gapped regime within the bond-operator framework, by implementing three qualitative advances that account for triplet correlation effects, their evolution in a field, and the magnetization induced when both field and temperature are finite. Quantitative and parameter-free results are presented as experimental comparisons with the measured specific heat and as predictions for thermal renormalization of the triplet magnon excitations.

arXiv:1006.4196Physical Review BFeb 14, 201155 citations

We consider the easy-plane anisotropic spin-

\frac{1}{2}

Heisenberg chain in combined uniform longitudinal and transverse staggered magnetic fields. The low-energy limit of his model is described by the sine-Gordon quantum field theory. Using methods of integrable quantum field theory we determine the various components of the dynamical structure factor. To do so, we derive explicit expressions for all matrix elements of the low-energy projections of the spin operators involving at most two particles. We discuss applications of our results to experiments on one-dimensional quantum magnets.

The discovery of the almost ideal, two-chain spin-ladder material (C

{}_{5}

{}_{12}

{}_{2}

CuBr

{}_{4}

has once again focused attention on this most fundamental problem in low-dimensional quantum magnetism. With experimental data now available at all temperatures and magnetic fields, a correspondingly systematic theoretical description is required. This is obtained for the gapped regime within the bond-operator framework, by implementing three qualitative advances that account for triplet correlation effects, their evolution in a field, and the magnetization induced when both field and temperature are finite. Quantitative and parameter-free results are presented as experimental comparisons with the measured specific heat and as predictions for thermal renormalization of the triplet magnon excitations.