Gravitational Influence on Atomic Interference

Quantum and Optical Dynamics of Matter for Nanotechnology - Advances in Chemical and Materials Engineering ◽

10.4018/978-1-4666-4687-2.ch009 ◽

2014 ◽

pp. 348-360

Keyword(s):

Atomic Systems ◽

Matter Waves ◽

Gravitational Influence ◽

Atomic Interference

Two-level atomic systems are studied under gravitation influence and then employed in sequential pulse towards modeling the Kasevich-Chu interferometer with matter waves.

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Moiré pattern of interference dislocations in condensate of indirect excitons

Nature Communications ◽

10.1038/s41467-021-21353-7 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

J. R. Leonard ◽

Lunhui Hu ◽

A. A. High ◽

A. T. Hammack ◽

Congjun Wu ◽

...

Keyword(s):

Long Range ◽

Direct Measurement ◽

Quantum Systems ◽

Matter Waves ◽

Moire Pattern ◽

Indirect Excitons ◽

Moiré Pattern ◽

Moiré Effect ◽

Phase Singularities ◽

Bose Einstein

AbstractInterference patterns provide direct measurement of coherent propagation of matter waves in quantum systems. Superfluidity in Bose–Einstein condensates of excitons can enable long-range ballistic exciton propagation and can lead to emerging long-scale interference patterns. Indirect excitons (IXs) are formed by electrons and holes in separated layers. The theory predicts that the reduced IX recombination enables IX superfluid propagation over macroscopic distances. Here, we present dislocation-like phase singularities in interference patterns produced by condensate of IXs. We analyze how exciton vortices and skyrmions should appear in the interference experiments and show that the observed interference dislocations are not associated with these phase defects. We show that the observed interference dislocations originate from the moiré effect in combined interference patterns of propagating condensate matter waves. The interference dislocations are formed by the IX matter waves ballistically propagating over macroscopic distances. The long-range ballistic IX propagation is the evidence for IX condensate superfluidity.

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Lorentz and CPT tests in atomic systems

10.1063/1.1330909 ◽

2000 ◽

Cited By ~ 4

Author(s):

Robert Bluhm

Keyword(s):

Atomic Systems

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Theoretical progress in the H2+ molecular ion: towards electron to proton mass ratio determinationThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.

Canadian Journal of Physics ◽

10.1139/p10-065 ◽

2011 ◽

Vol 89 (1) ◽

pp. 103-107 ◽

Cited By ~ 10

Author(s):

J.-Ph. Karr ◽

L. Hilico ◽

V. I. Korobov

Keyword(s):

High Resolution ◽

Mass Ratio ◽

Theoretical Determination ◽

Atomic Systems ◽

The Road ◽

Theoretical Progress ◽

Proton Mass ◽

Accuracy Level ◽

Ratio Determination

High resolution ro-vibrational spectroscopy of H 2+ or HD+ can lead to a significantly improved determination of the electron to proton mass ratio me/mp if the theoretical determination of transition frequencies becomes sufficiently accurate. We report on recent theoretical progress in the description of the hyperfine structure of H 2+ , as well as first steps in the evaluation of radiative corrections at order mα7. Completion of the latter calculation should allow us to reach the projected 10−10 accuracy level and open the road to mass ratio determination.

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Semiclassical calculations of the quadruple excited four-electron systems

Serbian Astronomical Journal ◽

10.2298/saj0775033s ◽

2007 ◽

pp. 33-44

Author(s):

N. Simonovic ◽

M. Predojevic ◽

V. Pankovic ◽

P. Grujic

Keyword(s):

Energy Levels ◽

Point Of View ◽

Interstellar Space ◽

Vibrational Modes ◽

Electron Systems ◽

Atomic Systems ◽

Excited Atoms ◽

Relative Contribution ◽

Quantum Numbers ◽

Semiclassical States

Highly excited atoms acquire very large dimensions and can be present only in a very rarified gas medium, such as the interstellar space. Multiply excited beryllium-like systems, when excited to large principal quantum numbers, have a radius of r ? 10 ?. We examine the semiclassical spectrum of quadruple highly excited four-electron atomic systems for the plane model of equivalent electrons. The energy of the system consists of rotational and vibrational modes within the almost circular orbit approximation, as used in a previous calculation for the triply excited three-electron systems. Here we present numerical results for the beryllium atom. The lifetimes of the semiclassical states are estimated via the corresponding Lyapunov exponents. The vibrational modes relative contribution to the energy levels rises with the degree of the Coulombic excitation. The relevance of the results is discussed both from the observational and heuristic point of view.

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