An electronic quantum eraser

The quantum eraser is a device that illustrates the quantum principle of complementarity and shows how a dephased system can regain its lost quantum behavior by erasing the "which-path" information already obtained about it. Thus far, quantum erasers were constructed predominantly in optic...

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Published inScience (American Association for the Advancement of Science) Vol. 344; no. 6190; pp. 1363 - 1366
Main Authors Weisz, E., Choi, H. K., Sivan, I., Heiblum, M., Gefen, Y., Mahalu, D., Umansky, V.
Format Journal Article
LanguageEnglish
Published United States American Association for the Advancement of Science 20.06.2014
The American Association for the Advancement of Science
Subjects
Autocorrelation
Electric current
Electronic Equipment
Electronics
Electrons
Erasers
Magnetic fields
Microscopes
Microscopy
Particle physics
Photons
Quantum complementarity
Quantum mechanics
Quantum physics
researchers
Solid state devices
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Summary:The quantum eraser is a device that illustrates the quantum principle of complementarity and shows how a dephased system can regain its lost quantum behavior by erasing the "which-path" information already obtained about it. Thus far, quantum erasers were constructed predominantly in optical systems. Here, we present a realization of a quantum eraser in a mesoscopic electronic device. The use of interacting electrons, instead of noninteracting photons, allows control over the extracted information and a smooth variation of the degree of quantum erasure. The demonstrated system can serve as a first step toward a variety of more complex setups.
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ISSN:0036-8075
1095-9203
1095-9203
DOI:10.1126/science.1248459