Encoding qubits into oscillators with atomic ensembles and squeezed light
| Autor: | Keith R. Motes, Ben Q. Baragiola, Nicolas C. Menicucci, Alexei Gilchrist |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics Photon Cluster state FOS: Physical sciences Quantum entanglement 01 natural sciences 010305 fluids & plasmas Computer Science::Emerging Technologies Quantum error correction Quantum mechanics Qubit 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Quantum Quantum computer Squeezed coherent state |
| Zdroj: | Physical Review A. 95 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.95.053819 |
| Popis: | The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator provides a number of advantages when used in a fault-tolerant architecture for quantum computing, most notably that Gaussian operations suffice to implement all single- and two-qubit Clifford gates. The main drawback of the encoding is that the logical states themselves are challenging to produce. Here we present a method for generating optical GKP-encoded qubits by coupling an atomic ensemble to a squeezed state of light. Particular outcomes of a subsequent spin measurement of the ensemble herald successful generation of the resource state in the optical mode. We analyze the method in terms of the resources required (total spin and amount of squeezing) and the probability of success. We propose a physical implementation using a Faraday-based quantum non-demolition interaction. (v2) consistent with published version; (v1) 16 pages, 5 figures |
| Databáze: | OpenAIRE |
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