scholarly journals Magnetic field tuning of quantum spin excitations in a weakly coupled S=12 Heisenberg spin chain as seen from NMR

2019 ◽  
Vol 100 (12) ◽  
Author(s):  
Long Ma ◽  
Z. Wang ◽  
L. Hu ◽  
Z. Qu ◽  
N. Hao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Chain ◽  
Quantum Spin ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
Weakly Coupled ◽  
Spin Excitations

scholarly journals T − W relation and free energy of the Heisenberg chain at a finite temperature

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Pengcheng Lu ◽  
Yi Qiao ◽  
Junpeng Cao ◽  
Wen-Li Yang ◽  
Kang jie Shi ◽  
...  
Keyword(s):  
Free Energy ◽  
Spin Chain ◽  
Quantum Spin ◽  
Heisenberg Chain ◽  
Quantum Spin Chain ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
Lattice Quantum ◽  
Quantum Integrable Models ◽  
Invariant Quantum

Abstract A new nonlinear integral equation (NLIE) describing the thermodynamics of the Heisenberg spin chain is derived based on the t − W relation of the quantum transfer matrices. The free energy of the system in a magnetic field is thus obtained by solving the NLIE. This method can be generalized to other lattice quantum integrable models. Taking the SU(3)-invariant quantum spin chain as an example, we construct the corre- sponding NLIEs and compute the free energy. The present results coincide exactly with those obtained via other methods previously.

scholarly journals Analytical results on the Heisenberg spin chain in a magnetic field

2019 ◽  
Vol 52 (25) ◽  
pp. 255302 ◽  
Author(s):  
Etienne Granet ◽  
Jesper Lykke Jacobsen ◽  
Hubert Saleur
Keyword(s):  
Magnetic Field ◽  
Spin Chain ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
Analytical Results

scholarly journals Quantum spin transistor with a Heisenberg spin chain

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
O. V. Marchukov ◽  
A. G. Volosniev ◽  
M. Valiente ◽  
D. Petrosyan ◽  
N. T. Zinner
Keyword(s):  
Spin Chain ◽  
Quantum Spin ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
Spin Transistor

scholarly journals Multiple fermion scattering in the weakly coupled spin-chain compound YbAlO3

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
S. E. Nikitin ◽  
S. Nishimoto ◽  
Y. Fan ◽  
J. Wu ◽  
L. S. Wu ◽  
...  
Keyword(s):  
Spin Chain ◽  
Density Wave ◽  
Spin Density Wave ◽  
Coherent Scattering ◽  
Magnetic Systems ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
Weakly Coupled ◽  
Energy Physics ◽  
Chain Compound

AbstractThe Heisenberg antiferromagnetic spin-1/2 chain, originally introduced almost a century ago, is one of the best studied models in quantum mechanics due to its exact solution, but nevertheless it continues to present new discoveries. Its low-energy physics is described by the Tomonaga-Luttinger liquid of spinless fermions, similar to the conduction electrons in one-dimensional metals. In this work we investigate the Heisenberg spin-chain compound YbAlO3 and show that the weak interchain coupling causes Umklapp scattering between the left- and right-moving fermions and stabilizes an incommensurate spin-density wave order at q = 2kF under finite magnetic fields. These Umklapp processes open a route to multiple coherent scattering of fermions, which results in the formation of satellites at integer multiples of the incommensurate fundamental wavevector Q = nq. Our work provides surprising and profound insight into bandstructure control for emergent fermions in quantum materials, and shows how neutron diffraction can be applied to investigate the phenomenon of coherent multiple scattering in metals through the proxy of quantum magnetic systems.

Quantum discord and quantum phase transition in the XXZ spin chain with three-site interaction

2016 ◽  
Vol 30 (34) ◽  
pp. 1650393 ◽  
Author(s):  
Jing Yang ◽  
Mei-Yan Cong ◽  
Yan-Xia Huang
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Spin Chain ◽  
Quantum Discord ◽  
Anisotropy Parameter ◽  
Cooperative Effect ◽  
Heisenberg Spin ◽  
Heisenberg Spin Chain ◽  
Maximum Value ◽  
Quantum Critical Phenomena

Pairwise quantum discord (QD) and entanglement of the three-qubit XXZ Heisenberg spin chain with two types of three-site interactions and an external magnetic field are investigated. Our study found that both entanglement and quantum discord could detect the quantum critical phenomena of this model. We were able to obtain a nonzero value of quantum discord even at high temperature with the increase of XZX[Formula: see text]YZY or XZY[Formula: see text]YZX three-site interaction, however, the cooperative effect of XZX[Formula: see text]YZY and XZY[Formula: see text]YZX interactions is more ideal. Furthermore, in contrast to XZY[Formula: see text]YZX and XZX[Formula: see text]YZY interactions, the cooperative effect of XZX[Formula: see text]YZY and XZY[Formula: see text]YZX three-site interactions is more efficient to enhance the maximum value of quantum discord. Likewise, the cooperative effect of XZX[Formula: see text]YZY and XZY[Formula: see text]YZX interactions is the most optimal to increase the range of magnetic field or anisotropy parameter where quantum discord maintains the maximum value.

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