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Physics Letters A

Electromagnetic potentials in quantum mechanics: A proposed test of the Aharonov-Bohm effect

C.G. Kuper

Published Oct 1, 1980• 36 citations
Publisher
DOI
10.1016/0375-9601(80)90279-0

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The Aharonov-Bohm (AB) effect highlights the fundamental role of electromagnetic potentials in quantum mechanics. While extensively studied in the static case, the impact of a time-varying magnetic flux on the electron's phase shift remains an open and debated question. In this paper, we derive the AB phase shift for a time-dependent magnetic vector potential and show that it is proportional to the time average of enclosed magnetic flux. Our analysis reveals that the AB phase is continuously accumulated as the electron traverses its path, challenging the conventional view that it emerges instantaneously at the point of interference. This generalized AB effect may provide deeper insight into the role of gauge-dependent potentials in quantum mechanics and also suggest novel experimental tests using alternating or pulsed magnetic flux.

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The Aharonov-Bohm (AB) effect underscores the fundamental role of electromagnetic and gravitational potentials in quantum mechanics, even in regions where classical fields vanish.In this article, we summarize and expand on our recent work on the AB effect.We explore the gravitational AB effect as a generalization of gravitational redshift, considering a quantum system in orbit around a massive body.In this scenario, time-dependent gravitational potentials give rise to sidebands in the energy spectrum, which could be detected using precision atomic clocks aboard satellites.In parallel, we extend recent investigations of the electric-scalar AB effect.By using a balanced interferometric excitation scheme in a microwave cavity, on resonance, we achieve 25 dB suppression of the electromagnetic fieldwhile enhancing the time-varying scalar electric potential.This offers a promising platform to directly probe the electricscalar AB effect under conditions of a null electric field and a finite scalar potential.Also, it enables the realization of a resonant system exhibiting extreme dispersion.These complementary approaches provide new experimental pathways to test fundamental quantum effects in electromagnetic and gravitational potentials.

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The Aharonov-Bohm (AB) effect highlights the fundamental role of electromagnetic potentials in quantum mechanics. While extensively studied in the static case, the impact of a time-varying magnetic flux on the electron's phase shift remains an open and debated question. In this paper, we derive the AB phase shift for a time-dependent magnetic vector potential and show that it is proportional to the time average of enclosed magnetic flux. Our analysis reveals that the AB phase is continuously accumulated as the electron traverses its path, challenging the conventional view that it emerges instantaneously at the point of interference. This generalized AB effect may provide deeper insight into the role of gauge-dependent potentials in quantum mechanics and also suggest novel experimental tests using alternating or pulsed magnetic flux.
The Aharonov-Bohm (AB) effect underscores the fundamental role of electromagnetic and gravitational potentials in quantum mechanics, even in regions where classical fields vanish.In this article, we summarize and expand on our recent work on the AB effect.We explore the gravitational AB effect as a generalization of gravitational redshift, considering a quantum system in orbit around a massive body.In this scenario, time-dependent gravitational potentials give rise to sidebands in the energy spectrum, which could be detected using precision atomic clocks aboard satellites.In parallel, we extend recent investigations of the electric-scalar AB effect.By using a balanced interferometric excitation scheme in a microwave cavity, on resonance, we achieve 25 dB suppression of the electromagnetic fieldwhile enhancing the time-varying scalar electric potential.This offers a promising platform to directly probe the electricscalar AB effect under conditions of a null electric field and a finite scalar potential.Also, it enables the realization of a resonant system exhibiting extreme dispersion.These complementary approaches provide new experimental pathways to test fundamental quantum effects in electromagnetic and gravitational potentials.