scholarly journals Magnetic properties and quench dynamics of two interacting ultracold molecules in a trap

2020 ◽  
Vol 22 (48) ◽  
pp. 28140-28153
Author(s):  
Anna Dawid ◽  
Michał Tomza
Keyword(s):  
Magnetic Properties ◽  
Internal Structure ◽  
Nonequilibrium Dynamics ◽  
External Fields ◽  
Ultracold Molecules ◽  
Quench Dynamics

The interplay of external fields and internal structure of two interacting ultracold trapped molecules produces rich magnetization diagrams and nonequilibrium dynamics.

scholarly journals Topological holographic quench dynamics in a synthetic frequency dimension

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Danying Yu ◽  
Bo Peng ◽  
Xianfeng Chen ◽  
Xiong-Jun Liu ◽  
Luqi Yuan
Keyword(s):  
Quantum Dynamics ◽  
Dimensional Space ◽  
Dynamical Evolution ◽  
Spin Model ◽  
Ring Resonators ◽  
Nonequilibrium Dynamics ◽  
Topological Phases ◽  
Time Dimension ◽  
Efficient Scheme ◽  
Quench Dynamics

AbstractThe notion of topological phases extended to dynamical systems stimulates extensive studies, of which the characterization of nonequilibrium topological invariants is a central issue and usually necessitates the information of quantum dynamics in both the time and momentum dimensions. Here, we propose the topological holographic quench dynamics in synthetic dimension, and also show it provides a highly efficient scheme to characterize photonic topological phases. A pseudospin model is constructed with ring resonators in a synthetic lattice formed by frequencies of light, and the quench dynamics is induced by initializing a trivial state, which evolves under a topological Hamiltonian. Our key prediction is that the complete topological information of the Hamiltonian is encoded in quench dynamics solely in the time dimension, and is further mapped to lower-dimensional space, manifesting the holographic features of the dynamics. In particular, two fundamental time scales emerge in the dynamical evolution, with one mimicking the topological band on the momentum dimension and the other characterizing the residue time evolution of the state after the quench. For this, a universal duality between the quench dynamics and the equilibrium topological phase of the spin model is obtained in the time dimension by extracting information from the field evolution dynamics in modulated ring systems in simulations. This work also shows that the photonic synthetic frequency dimension provides an efficient and powerful way to explore the topological nonequilibrium dynamics.

THE MAGNETIC BEHAVIOR OF (Y1-xTbx)3Co11B4 INTERMETALLIC COMPOUNDS

1999 ◽  
Vol 13 (25) ◽  
pp. 905-910
Author(s):  
R. TETEAN ◽  
V. POP ◽  
E. BURZO ◽  
I. GR. DEAC
Keyword(s):  
Magnetic Properties ◽  
Intermetallic Compounds ◽  
Exchange Interactions ◽  
Magnetic Behavior ◽  
Hexagonal Structure ◽  
External Fields ◽  
Space Group ◽  
Temperature Range ◽  
Ferrimagnetic Ordering ◽  
Curie Temperatures

The R 3 Co 11 B 4 compounds belong to the R n+1 Co 3n+5 B 2n intermetallic systems. The R 3 Co 11 B 4 borides crystallize in a hexagonal structure of Ce 3 Co 11 B 4 type having the space group P6/mmm. The composition dependencies of the lattice parameters in ( Y 1-x Tb x)3 Co 11 B 4 compounds are linear and different for a and c parameters. The magnetic properties of ( Y 1-x Tb x)3 Co 11 B 4 compounds were investigated in the temperature range 4.2–950 K and external fields up to 10 T. The Y 3 Co 11 B 4 compound is ferromagnetically ordered. For the compounds with x>0, a ferrimagnetic ordering is evidenced. The Curie temperatures increase when yttrium is substituted by terbium, as a consequence of the increase of the exchange interactions in the system. The magnetic behavior of cobalt in the above system is analyzed.

scholarly journals Tuning the electronic and magnetic properties of antimonene nanosheets via point defects and external fields: first-principles calculations

2019 ◽  
Vol 21 (20) ◽  
pp. 10552-10566 ◽  
Author(s):  
Asadollah Bafekry ◽  
Mitra Ghergherehchi ◽  
Saber Farjami Shayesteh
Keyword(s):  
Magnetic Properties ◽  
Physical Properties ◽  
Point Defects ◽  
First Principles ◽  
External Fields ◽  
First Principles Calculations ◽  
Electronic And Magnetic Properties ◽  
Fundamental Physical

Defects are inevitably present in materials, and their existence in a material strongly affects its fundamental physical properties.

scholarly journals How shape and internal structure affect the magnetic properties of anisometric magnetite nanoparticles

2017 ◽  
Vol 125 ◽  
pp. 416-424 ◽  
Author(s):  
Helena Gavilán ◽  
Oliver Posth ◽  
Lara K. Bogart ◽  
Uwe Steinhoff ◽  
Lucía Gutiérrez ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Internal Structure ◽  
Magnetite Nanoparticles

Internal Structure and Magnetic Properties in Cobalt Ferrite Nanoparticles: Influence of the Synthesis Method

2019 ◽  
Vol 36 (4) ◽  
pp. 1900061 ◽  
Author(s):  
Gabriel Lavorato ◽  
Mariella Alzamora ◽  
Cynthia Contreras ◽  
Gabriel Burlandy ◽  
F. Jochen Litterst ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Internal Structure ◽  
Cobalt Ferrite ◽  
Synthesis Method ◽  
Ferrite Nanoparticles ◽  
Cobalt Ferrite Nanoparticles

Relativistic point particles in external fields

2019 ◽  
Vol 34 (08) ◽  
pp. 1950043 ◽  
Author(s):  
Mohammad Khorrami
Keyword(s):  
Special Relativity ◽  
Internal Structure ◽  
Proper Time ◽  
Point Particle ◽  
Action Principle ◽  
External Fields ◽  
Tensor Fields ◽  
Point Particles ◽  
Evolution Parameter

Motion of a point particle (a particle without any internal structure) in the context of special relativity is investigated. The study is based on the action principle with either time or the proper time regarded as the evolution parameter. Actions corresponding to the motion of particle in general external tensor fields are obtained.

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