V
Vladimir Umansky
Researcher at Weizmann Institute of Science
Publications - 279
Citations - 12819
Vladimir Umansky is an academic researcher from Weizmann Institute of Science. The author has contributed to research in topics: Quantum Hall effect & Electron. The author has an hindex of 55, co-authored 266 publications receiving 11469 citations. Previous affiliations of Vladimir Umansky include Harvard University & University of Regensburg.
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Direct observation of a fractional charge
TL;DR: In this paper, it was shown that current in a two-dimensional electron gas in the FQH regime is carried by fractional charges (e/3 in the present case) in agreement with Laughlin's prediction.
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Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits
TL;DR: A controlled two-qubit operation between singlet-triplet qubits is performed using a dynamically decoupled sequence that maintains the two- qubit coupling while decoupling each qubit from its fluctuating environment, providing proof of entanglement.
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Dephasing time of GaAs electron-spin qubits coupled to a nuclear bath exceeding 200 μs
Hendrik Bluhm,Sandra Foletti,Izhar Neder,Mark S. Rudner,Diana Mahalu,Vladimir Umansky,Amir Yacoby +6 more
TL;DR: In this article, a study of GaAs quantum dots was conducted to provide a fuller understanding of the memory loss and how it can be suppressed, and two orders of magnitude longer than previously reported for this system.
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Zero-resistance states induced by electromagnetic-wave excitation in GaAs/AlGaAs heterostructures
Ramesh G. Mani,Ramesh G. Mani,Jurgen H. Smet,Klaus von Klitzing,Venkatesh Narayanamurti,William B. Johnson,Vladimir Umansky +6 more
TL;DR: The results suggest an unexpected radiation-induced, electronic-state-transition in the GaAs/AlGaAs 2DES, which exhibits vanishing diagonal resistance without Hall resistance quantization at low temperatures and low magnetic fields when the specimen is subjected to electromagnetic wave excitation.
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Phase measurement in a quantum dot via a double-slit interference experiment
TL;DR: In this article, the phase evolution within a resonance of a quantum dot can be explained by a model that ignores the interactions between the electrons within the dot, and the phase behaviour is identical for all resonances, and there is a sharp jump of the phase between successive resonance peaks.