Generation of a Space-Time Pulse with a Controllable Group Velocity as a Function of Distance Utilizing Classical Entanglement by Combining Multiple Frequencies Each Containing Multiple Laguerre Gaussian Modes

2020 ◽  
Author(s):  
Kaiheng Zou ◽  
Zhe Zhao ◽  
Hao Song ◽  
Kai Pang ◽  
Amir Minoofar ◽  
...  
Keyword(s):  
Group Velocity ◽  
Space Time ◽  
Multiple Frequencies ◽  
Time Pulse

Generalized space-time pulse position modulation over Gamma-Gamma turbulence channel

2020 ◽  
Vol 28 (11) ◽  
pp. 2437-2445
Author(s):  
Yue ZHANG ◽  
◽  
Hui-qin WANG ◽  
Li-ping ZHANG ◽  
Zhong-xian BAO ◽  
...  
Keyword(s):  
Space Time ◽  
Pulse Position Modulation ◽  
Time Pulse

Group velocity in space-time periodic media

1971 ◽  
Vol 7 (14) ◽  
pp. 410 ◽  
Author(s):  
R.S. Chu ◽  
T. Tamir
Keyword(s):  
Group Velocity ◽  
Space Time ◽  
Periodic Media ◽  
Time Periodic

Simulation of near-diffraction- and near-dispersion-free OAM pulses with controllable group velocity by combining multiple frequencies, each carrying a Bessel mode

2021 ◽  
Vol 46 (18) ◽  
pp. 4678
Author(s):  
Kai Pang ◽  
Kaiheng Zou ◽  
Hao Song ◽  
Zhe Zhao ◽  
Amir Minoofar ◽  
...  
Keyword(s):  
Group Velocity ◽  
Multiple Frequencies

scholarly journals Properties of propagation of quantum spin systems

1976 ◽  
Vol 19 (4) ◽  
pp. 387-399 ◽  
Author(s):  
Derek W. Robinson
Keyword(s):  
Ising Model ◽  
Large Class ◽  
Group Velocity ◽  
Short Range ◽  
Space Time ◽  
Quantum Spin ◽  
Spin Systems ◽  
Quantum Spin Systems ◽  
Causal Propagation ◽  
Suitable Space

AbstractUsing an estimate on the group velocity we give an independent proof of the existence of time translations for a large class of short range interactions. We demonstrate that these systems satisfy a strong form of causal propagation and that space-time algebras in suitable space-like directions are disjoint. Finally we derive criteria for dispersion of the interaction in terms of the algebraic density of the orbit of local subalgebras under the evolution or under the associated group of shifts. In this sense the Heisenberg and X-Y models are dispersive but the Ising model is not.

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