Majorana Entanglement Bridge
arXiv:1503.06399 · doi:10.1103/PhysRevB.91.214507
Abstract
We study the concurrence of entanglement between two quantum dots in contact to Majorana bound states on a floating superconducting island. The distance between the Majorana states, the charging energy of the island, and the average island charge are shown to be decisive parameters for the efficiency of entanglement generation. We find that long-range entanglement with basically distance-independent concurrence is possible over wide parameter regions, where the proposed setup realizes a "Majorana entanglement bridge". We also study the time-dependent concurrence obtained after one of the tunnel couplings is suddenly switched on, which reveals the timescales for generating entanglement. Accurate analytical expressions for the concurrence are derived both for the static and the time-dependent case. Our results indicate that entanglement formation in interacting Majorana devices can be fully understood in terms of an interplay of elastic cotunneling (also referred to as "teleportation") and crossed Andreev reflection processes.
16 pages, 8 figures, version to appear in PRB
References in corpus (15)
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
- Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
- Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
- Introduction to topological superconductivity and Majorana fermions
- Observing Majorana Bound States in p-wave Superconductors Using Noise Measurements in Tunneling Experiments
- Topological Kondo effect with Majorana fermions
- Anyonic interferometry without anyons: How a flux qubit can read out a topological qubit
- Electron counting in quantum dots
- Universal quantum computation on a semiconductor quantum wire network
- Interface Between Topological and Superconducting Qubits
- Testable signatures of quantum non-locality in a two-dimensional chiral p-wave superconductor
- Entanglement Routers Using Macroscopic Singlets
- Using hybrid topological-spin qubit systems for two-qubit-spin gates
- Bell states and entanglement dynamics on two coupled quantum molecules