Bohm-Aharonov experiment without an electron microscope
نویسندگان
چکیده
منابع مشابه
Quantum Transport in an Aharonov-Bohm Electron Interferometer
We report experiments on quantum electron interferometers fabricated from GaAs/AlGaAs heterojunctions. In this kind of devices, an electron island with two nearly open constrictions is defined by etched trenches. In the quantum Hall (QH) regime, two counterpropagating edge channels are coupled by tunneling in the constrictions, thus forming a closed interference path. We observe periodic Aharon...
متن کاملSingle-slit electron diffraction with Aharonov-Bohm phase: Feynman's thought experiment with quantum point contacts.
In a "thought experiment," now a classic in physics pedagogy, Feynman visualizes Young's double-slit interference experiment with electrons in magnetic field. He shows that the addition of an Aharonov-Bohm phase is equivalent to shifting the zero-field wave interference pattern by an angle expected from the Lorentz force calculation for classical particles. We have performed this experiment wit...
متن کاملThe Aharonov-Bohm Effect: Still a Thought-Provoking Experiment
Nearly 30 years have passed since Aharonov and Bohm suggested the beautiful effect that bears their name. ~1) Theoretically, their paper led to a substantial reassessment of the role of electromagnetic potentials in quantum physicsJ 2) Experimentally, it inspired a whole series of elegant, landmark experiments. (3) Over the years the Aharonov-Bohm (or AB) effect has continued to stimulate new i...
متن کاملChannel Interference in a Quasi Ballistic Aharonov-Bohm Experiment
New experiments are presented on the transmission of electron waves through a 2DEG (2 dimensional electron gas) ring with a gate on top of one of the branches. Magnetoconductance oscillations are observed, and the phase of the Aharanov-Bohm signal alternates between 0 and π as the gate voltage is scanned. A Fourier transform of the data reveals a dominant period in the voltage which corresponds...
متن کاملForce-free gravitational redshift: proposed gravitational Aharonov-Bohm experiment.
We propose a feasible laboratory interferometry experiment with matter waves in a gravitational potential caused by a pair of artificial field-generating masses. It will demonstrate that the presence of these masses (and, for moving atoms, time dilation) induces a phase shift, even if it does not cause any classical force. The phase shift is identical to that produced by the gravitational redsh...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 1978
ISSN: 0556-2791
DOI: 10.1103/physreva.18.773