scholarly journals A single-shot measurement of time-dependent diffusion over sub-millisecond timescales using static field gradient NMR

2021 ◽  
Vol 154 (11) ◽  
pp. 111105
Author(s):  
Teddy X. Cai ◽  
Nathan H. Williamson ◽  
Velencia J. Witherspoon ◽  
Rea Ravin ◽  
Peter J. Basser
Keyword(s):  
Field Gradient ◽  
Static Field ◽  
Time Dependent ◽  
Single Shot

Static field gradient NMR studies of water diffusion in mesoporous silica

2020 ◽  
Vol 22 (25) ◽  
pp. 13989-13998 ◽  
Author(s):  
Max Weigler ◽  
Edda Winter ◽  
Benjamin Kresse ◽  
Martin Brodrecht ◽  
Gerd Buntkowsky ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Field Gradient ◽  
Pore Diameter ◽  
Static Field ◽  
Water Diffusion ◽  
Arrhenius Behavior ◽  
Nmr Studies

Water diffusion inside silica pores shows Arrhenius behavior and slows down when the pore diameter decreases or internal ice forms.

Spatially resolved characterization of Xe ion irradiated LiF crystals using static field gradient NMR

2008 ◽  
Vol 20 (46) ◽  
pp. 465215 ◽  
Author(s):  
H Stork ◽  
K-P Dinse ◽  
F Fujara ◽  
A Hamburger ◽  
P Jakes ◽  
...  
Keyword(s):  
Field Gradient ◽  
Static Field ◽  
Spatially Resolved

scholarly journals Dynamics of Ultracold Bosons in Artificial Gauge Fields—Angular Momentum, Fragmentation, and the Variance of Entropy

Entropy ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 392
Author(s):  
Axel U. J. Lode ◽  
Sunayana Dutta ◽  
Camille Lévêque
Keyword(s):  
Angular Momentum ◽  
Gauge Field ◽  
Time Dependent ◽  
Gauge Fields ◽  
Single Shot ◽  
Body Density ◽  
Many Body ◽  
Atomic Systems ◽  
Body State ◽  
The Many

We consider the dynamics of two-dimensional interacting ultracold bosons triggered by suddenly switching on an artificial gauge field. The system is initialized in the ground state of a harmonic trapping potential. As a function of the strength of the applied artificial gauge field, we analyze the emergent dynamics by monitoring the angular momentum, the fragmentation as well as the entropy and variance of the entropy of absorption or single-shot images. We solve the underlying time-dependent many-boson Schrödinger equation using the multiconfigurational time-dependent Hartree method for indistinguishable particles (MCTDH-X). We find that the artificial gauge field implants angular momentum in the system. Fragmentation—multiple macroscopic eigenvalues of the reduced one-body density matrix—emerges in sync with the dynamics of angular momentum: the bosons in the many-body state develop non-trivial correlations. Fragmentation and angular momentum are experimentally difficult to assess; here, we demonstrate that they can be probed by statistically analyzing the variance of the image entropy of single-shot images that are the standard projective measurement of the state of ultracold atomic systems.

Fundamental Study on the NMR Spectroscopy in a Time Dependent Longitudinal Field

2012 ◽  
Vol 629 ◽  
pp. 906-910
Author(s):  
Yi Fan Hu ◽  
Hong Ma ◽  
Jin Bo Li ◽  
Bin Xu
Keyword(s):  
Nmr Spectroscopy ◽  
Simple Formula ◽  
Spin Transition ◽  
Static Field ◽  
Time Dependent ◽  
Longitudinal Field ◽  
Fundamental Study ◽  
Experimental Scheme ◽  
Time Map ◽  
Theoretical Side

The paper mainly focuses on the possibility of realizing the NMR spectroscopy in a non-static external field and discusses the experimental scheme for developing the probes with the abilities to provide a precise real-time map of the time dependent magnetic field. From theoretical side, the paper analyzes the effect on the spin transition by a time dependent longitudinal field. For a 1/2 spin system, we have derived a simple formula for the prediction of the probabilities of occupation of the 1/2 and -1/2 states in a non-static field.

Flat RF coils in static field gradient nuclear magnetic resonance

2009 ◽  
Vol 200 (2) ◽  
pp. 321-327 ◽  
Author(s):  
H. Stork ◽  
A. Gädke ◽  
N. Nestle ◽  
F. Fujara
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Field Gradient ◽  
Static Field ◽  
Rf Coils ◽  
Nuclear Magnetic

MAGNETIC DECELERATOR FOR PARTICLE BEAMS

2007 ◽  
Vol 21 (28) ◽  
pp. 1879-1883 ◽  
Author(s):  
IGOR F. LYUKSYUTOV
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Atomic Beam ◽  
Magnetic Field Gradient ◽  
Inhomogeneous Magnetic Field ◽  
Time Dependent ◽  
Particle Beams ◽  
Traveling Magnetic Field

We discuss possibility of using time-dependent inhomogeneous magnetic field to decrease the speed of particles in a molecular/atomic beam. This includes deceleration via traveling magnetic field gradient. We also discuss possible implementations of the magnetic decelerator.

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