Observation of a gravitational Aharonov-Bohm effect

Science ◽  
2022 ◽  
Vol 375 (6577) ◽  
pp. 226-229 ◽  
Author(s):  
Chris Overstreet ◽  
Peter Asenbaum ◽  
Joseph Curti ◽  
Minjeong Kim ◽  
Mark A. Kasevich
Keyword(s):  
Wave Packets ◽  
Gravitational Interaction ◽  
Large Mass ◽  
Mechanical Effect ◽  
Quantum Mechanical ◽  
Electron Wave ◽  
Rubidium Atoms ◽  
Quantum Mechanical Effect ◽  
Bohm Effect ◽  
Aharonov Bohm

Gravitational interference The Aharonov-Bohm effect is a quantum mechanical effect in which a magnetic field affects the phase of an electron wave as it propagates along a wire. Atom interferometry exploits the wave characteristic of atoms to measure tiny differences in phase as they take different paths through the arms of an interferometer. Overstreet et al . split a cloud of cold rubidium atoms into two atomic wave packets about 25 centimeters apart and subjected one of the wave packets to gravitational interaction with a large mass (see the Perspective by Roura). The authors state that the observed phase shift is consistent with a gravitational Aharonov-Bohm effect. —ISO

Phase Shift of an Electron Wave through a Quantum Dot and Aharonov-Bohm Effect

1999 ◽  
Vol 38 (Part 1, No. 1B) ◽  
pp. 392-395
Author(s):  
Yasuhiro Asano ◽  
Masafumi Ohi
Keyword(s):  
Phase Shift ◽  
Quantum Dot ◽  
Electron Wave ◽  
Bohm Effect ◽  
Aharonov Bohm

TOPOLOGICAL EFFECTS IN QUANTUM MECHANICS AND HIGH VELOCITY ESTIMATES

2011 ◽  
Vol 20 (05) ◽  
pp. 951-961 ◽  
Author(s):  
RICARDO WEDER
Keyword(s):  
Exact Solution ◽  
Quantum Mechanics ◽  
Error Bounds ◽  
High Velocity ◽  
Wave Packets ◽  
Finite Energy ◽  
Time Dependent ◽  
Rigorous Proof ◽  
Bohm Effect ◽  
Aharonov Bohm

We consider the problem of obtaining high-velocity estimates for finite energy solutions (wave packets) to Schrödinger equations for N-body systems. We discuss a time-dependent method that allows us to obtain precise estimates with error bounds that decay as a power of the velocity. We apply this method to the electric Aharonov–Bohm effect. We give the first rigorous proof that quantum mechanics predicts the existence of this effect. Our result follows from an estimate in norm, uniform in time, that proves that the Aharonov–Bohm Ansatz is a good approximation to the exact solution to the Schrödinger equation for high velocity.

scholarly journals Gravity induced quantum interference on gravitational wave background

2020 ◽  
Vol 35 (35) ◽  
pp. 2050290
Author(s):  
Mohammad A. Ganjali ◽  
Zainab Sedaghatmanesh
Keyword(s):  
Quantum Mechanics ◽  
Gravitational Wave ◽  
Quantum Interference ◽  
Gravitational Effect ◽  
Mechanical Effect ◽  
Quantum Mechanical ◽  
Quantum Mechanical Effect ◽  
Gravitational Wave Background

Gravity-induced quantum interference is an experiment that exhibits how a gravitational effect appears in quantum mechanics.1 In this famous experiment, gravity was added to the system just classically. In our study, we will do the related calculations on a gravitational wave background. We will argue that the effect of gravitational wave would be detectable in this quantum mechanical effect.

scholarly journals Modeling of 2DEG characteristics of InxAl1−xN/AlN/GaN-Based HEMT Considering Polarization and Quantum Mechanical Effect

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 410 ◽  
Author(s):  
Jian Qin ◽  
Quanbin Zhou ◽  
Biyan Liao ◽  
Hong Wang
Keyword(s):  
Mechanical Effect ◽  
Design Tool ◽  
Quantum Mechanical ◽  
Quantum Mechanical Effect ◽  
Poisson Equations ◽  
2Deg Density ◽  
Proposed Model ◽  
Gan Heterostructure ◽  
Lattice Matched ◽  
Subband Structure

A comprehensive model for 2DEG characteristics of InxAl1−xN/AlN/GaN heterostructure has been presented, taking both polarization and bulk ionized charge into account. Investigations on the 2DEG density and electron distribution across the heterostructure have been carried out using solutions of coupled 1-D Schrödinger-Poisson equations solved by an improved iterative scheme. The proposed model extends a previous approach allowing for estimating the quantum mechanical effect for a generic InAlN/GaN-based HEMT within the range of the Hartree approximation. A critical AlN thickness (~2.28 nm) is predicted when considering the 2DEG density in dependence on a lattice matched In0.17Al0.83N thickness. The obtained results present in this work provide a guideline for the experimental observation of the subband structure of InAlN/GaN heterostructure and may be used as a design tool for the optimization of that epilayer structure.

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