Journal
PHYSICAL REVIEW X
Volume 6, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.6.031016
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Funding
- Microsoft Research
- National Science Foundation [DMR-1341822, PHY-1066293]
- Alfred P. Sloan Foundation
- Caltech Institute for Quantum Information and Matter, an NSF Physics Frontiers Center
- Gordon and Betty Moore Foundation [GBMF1250]
- Walter Burke Institute for Theoretical Physics at Caltech
- NSERC PGSD program
- Crafoord Foundation
- Swedish Research Council
- Danish National Research Foundation
- Villum Foundation
- Danish Council for Independent Research/Natural Sciences
- Danmarks Nationalbank
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1341822] Funding Source: National Science Foundation
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We introduce a scheme for preparation, manipulation, and read out of Majorana zero modes in semiconducting wires with mesoscopic superconducting islands. Our approach synthesizes recent advances in materials growth with tools commonly used in quantum-dot experiments, including gate control of tunnel barriers and Coulomb effects, charge sensing, and charge pumping. We outline a sequence of milestones interpolating between zero-mode detection and quantum computing that includes (1) detection of fusion rules for non-Abelian anyons using either proximal charge sensors or pumped current, (2) validation of a prototype topological qubit, and (3) demonstration of non-Abelian statistics by braiding in a branched geometry. The first two milestones require only a single wire with two islands, and additionally enable sensitive measurements of the system's excitation gap, quasiparticle poisoning rates, residual Majorana zero-mode splittings, and topological-qubit coherence times. These pre-braiding experiments can be adapted to other manipulation and read out schemes as well.
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