scholarly journals Sum rules, dipole oscillation and spin polarizability of a spin-orbit coupled quantum gas

2012 ◽  
Vol 99 (5) ◽  
pp. 56008 ◽  
Author(s):  
Yun Li ◽  
Giovanni Italo Martone ◽  
Sandro Stringari
Keyword(s):  
Sum Rules ◽  
Spin Orbit ◽  
Quantum Gas ◽  
Spin Polarizability ◽  
Dipole Oscillation

scholarly journals Novel Plasmonic Modes of Monolayer MoS$_2$ in the Presence of Spin-Orbit Interactions

2018 ◽  
Author(s):  
Z.H. Tao ◽  
H.M. Dong ◽  
Y.F. Duan ◽  
F. Huang
Keyword(s):  
Random Phase Approximation ◽  
Theoretical Study ◽  
Random Phase ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Monolayer Mos2 ◽  
Spin Polarizability ◽  
Terahertz Devices ◽  
Spin Orbit Interactions ◽  
Plasmon Modes

We investigate on the plasmons of monolayer MoS2 in the presence of spin-orbit interactions (SOIs) under the random phase approximation. The theoretical study shows that two new and novel plasmonic modes can be achieved via inter spin sub-band transitions around the Fermi level duo to the SOIs. The plasmon modes are optic-like, which are very different from the plasmon modes reported recently in monolayer MoS2, and the other two-dimensional systems. The frequency of such plasmons increases with the increasing of the electron density or the spin polarizability, and decreases with the increasing of the wave vectors q. Our results exhibit some interesting features which can be utilized to the plasmonic and terahertz devices based on monolayer MoS2.

scholarly journals Raman-dressed spin-1 spin-orbit-coupled quantum gas

2014 ◽  
Vol 89 (2) ◽  
Author(s):  
Zhihao Lan ◽  
Patrik Öhberg
Keyword(s):  
Spin Orbit ◽  
Quantum Gas

Incompatibility of multipole predictions for the nucleon spin-polarizability and Drell-Hearn-Gerasimov sum rules

1994 ◽  
Vol 50 (11) ◽  
pp. R6681-R6685 ◽  
Author(s):  
A. M. Sandorfi ◽  
C. S. Whisnant ◽  
M. Khandaker
Keyword(s):  
Sum Rules ◽  
Nucleon Spin ◽  
Spin Polarizability

Anomalous plasmon modes of single-layer MoS2

2019 ◽  
Vol 33 (18) ◽  
pp. 1950200
Author(s):  
Z. H. Tao ◽  
H. M. Dong ◽  
Y. F. Duan
Keyword(s):  
Fermi Level ◽  
Electron Density ◽  
Wave Vector ◽  
Single Layer ◽  
The Other ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Spin Polarizability ◽  
Terahertz Devices ◽  
Plasmon Modes

The electronic plasmons of single layer MoS2 induced by different spin subbands owing to spin-orbit couplings (SOCs) are theoretically investigated. The study shows that two new and anomalous plasmonic modes can be achieved via inter-spin subband transitions around the Fermi level due to the SOCs. The plasmon modes are optic-like, which are very different from the plasmons reported recently in single-layer (SL) MoS2, and the other two-dimensional systems. The frequency of such plasmons ascends with the increasing of electron density or spin polarizability, and decreases with the increasing of wave vector. The promising plasmonic properties of SL MoS2 make it interesting for future applications in plasmonic and terahertz devices.

scholarly journals Dynamical Spin-Orbit Coupling of a Quantum Gas

2019 ◽  
Vol 123 (16) ◽  
Author(s):  
Ronen M. Kroeze ◽  
Yudan Guo ◽  
Benjamin L. Lev
Keyword(s):  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Quantum Gas ◽  
Dynamical Spin

scholarly journals Ideal Weyl semimetal with 3D spin-orbit coupled ultracold quantum gas

2020 ◽  
Vol 65 (24) ◽  
pp. 2080-2085
Author(s):  
Yue-Hui Lu ◽  
Bao-Zong Wang ◽  
Xiong-Jun Liu
Keyword(s):  
Spin Orbit ◽  
Quantum Gas ◽  
Weyl Semimetal

scholarly journals Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling

Science ◽  
2021 ◽  
Vol 372 (6539) ◽  
pp. 271-276 ◽  
Author(s):  
Zong-Yao Wang ◽  
Xiang-Can Cheng ◽  
Bao-Zong Wang ◽  
Jin-Yi Zhang ◽  
Yue-Hui Lu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Quantum Gas ◽  
Experimental Realization ◽  
Weyl Semimetal ◽  
Minimum Number ◽  
Quench Dynamics ◽  
Bulk Band

Weyl semimetals are three-dimensional (3D) gapless topological phases with Weyl cones in the bulk band. According to lattice theory, Weyl cones must come in pairs, with the minimum number of cones being two. A semimetal with only two Weyl cones is an ideal Weyl semimetal (IWSM). Here we report the experimental realization of an IWSM band by engineering 3D spin-orbit coupling for ultracold atoms. The topological Weyl points are clearly measured via the virtual slicing imaging technique in equilibrium and are further resolved in the quench dynamics. The realization of an IWSM band opens an avenue to investigate various exotic phenomena that are difficult to access in solids.

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

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