Transmitting the quantum state of electrons across a metallic island with Coulomb interaction

The Coulomb interaction generally limits the quantum propagation of electrons. However, it can also provide a mechanism to transfer their quantum state over larger distances. Here, we demonstrate such a form of electron teleportation across a metallic island. This effect originates from the low-temp...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2019-12, Vol.366 (6470), p.1243-1247
Main Authors: Duprez, H, Sivre, E, Anthore, A, Aassime, A, Cavanna, A, Gennser, U, Pierre, F
Format: Article
Language:English
Subjects:
Condensed Matter
Electrons
Freezing
Low temperature
Mesoscopic Systems and Quantum Hall Effect
Physics
Quantum entanglement
Qubits (quantum computing)
Transmission
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Summary:The Coulomb interaction generally limits the quantum propagation of electrons. However, it can also provide a mechanism to transfer their quantum state over larger distances. Here, we demonstrate such a form of electron teleportation across a metallic island. This effect originates from the low-temperature freezing of the island's charge Q which, in the presence of a single connected electronic channel, enforces a one-to-one correspondence between incoming and outgoing electrons. Such faithful quantum state imprinting is established between well-separated injection and emission locations and evidenced through two-path interferences in the integer quantum Hall regime. The additional quantum phase of 2π / , where is the electron charge, may allow for decoherence-free entanglement of propagating electrons, and notably of flying qubits.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aaw7856