Topological Josephson effect in gate-tunable qubit devices
ORAL
Abstract
Gate-tunable superconducting qubits that host Majorana zero modes realize an intermediate step to topologically protected qubits by storing the quantum state in topological degrees of freedom. In this talk I will present numerical simulations of such devices that combine superconducting proximity effect, orbital effects, electrostatic environment and realistic geometry. I will show the phase diagram and the key properties of these topological Josephson junctions, in particular the Josephson energy and Majorana coupling energy. Based on these I identify regimes of the surrounding electrostatic environment most favorable for realizing qubits and relate this to observable experimental features.
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Presenters
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Andrey Antipov
Microsoft Corp
Authors
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Andrey Antipov
Microsoft Corp
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Cameron King
Microsoft Corp
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Kewei Li
Microsoft Corp
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John Gamble
Microsoft Corp
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Bela Bauer
Station Q, Microsoft Quantum, Microsoft Corp, Microsoft
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Georg Winkler
Microsoft Corp, Microsoft Quantum, Microsoft Station Q, University of California Santa Barbara, Santa Barbara, CA 93106, USA
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Roman Lutchyn
Microsoft Quantum, Santa Barbara, CA, USA, Microsoft Corp, University of California, Santa Barbara, Microsoft Quantum, Microsoft Station Q, University of California Santa Barbara, Santa Barbara, CA 93106, USA, Station Q, Microsoft Research, Santa Barbara, California 93106-6105, USA