dorsal/arxiv
View SchemaEntangling spins by measuring charge: a parity-gate toolbox
| Authors | Radu Ionicioiu |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609118 |
| URL | https://arxiv.org/abs/quant-ph/0609118 |
| DOI | 10.1103/PhysRevA.75.032339 |
| Journal | Phys. Rev. A 75, 032339 (2007) |
Abstract
The parity gate emerged recently as a promising resource for performing universal quantum computation with fermions using only linear interactions. Here we analyse the parity gate (P-gate) from a theoretical point of view in the context of quantum networks. We present several schemes for entanglement generation with P-gates and show that native networks simplify considerably the resources required for producing multi-qubit entanglement, like n-GHZ states. Other applications include a Bell-state analyser and teleportation. We also show that cluster state fusion can be performed deterministically with parity measurements. We then extend this analysis to hybrid quantum networks containing spin and mode qubits. Starting from an easy-to-prepare resource (spin-mode entanglement of single electrons) we show how to produce a spin n-GHZ state with linear elements (beam-splitters and local spin-flips) and charge-parity detectors; this state can be used as a resource in a spin quantum computer or as a precursor for constructing cluster states. Finally, we construct a novel spin CZ-gate by using the mode degrees of freedom as ancillae.
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"abstract": "The parity gate emerged recently as a promising resource for performing\nuniversal quantum computation with fermions using only linear interactions.\nHere we analyse the parity gate (P-gate) from a theoretical point of view in\nthe context of quantum networks. We present several schemes for entanglement\ngeneration with P-gates and show that native networks simplify considerably the\nresources required for producing multi-qubit entanglement, like n-GHZ states.\nOther applications include a Bell-state analyser and teleportation. We also\nshow that cluster state fusion can be performed deterministically with parity\nmeasurements. We then extend this analysis to hybrid quantum networks\ncontaining spin and mode qubits. Starting from an easy-to-prepare resource\n(spin-mode entanglement of single electrons) we show how to produce a spin\nn-GHZ state with linear elements (beam-splitters and local spin-flips) and\ncharge-parity detectors; this state can be used as a resource in a spin quantum\ncomputer or as a precursor for constructing cluster states. Finally, we\nconstruct a novel spin CZ-gate by using the mode degrees of freedom as\nancillae.",
"arxiv_id": "quant-ph/0609118",
"authors": [
"Radu Ionicioiu"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.75.032339",
"journal_ref": "Phys. Rev. A 75, 032339 (2007)",
"title": "Entangling spins by measuring charge: a parity-gate toolbox",
"url": "https://arxiv.org/abs/quant-ph/0609118"
},
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