Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 012340 |
| Fachzeitschrift | Physical Review A |
| Jahrgang | 94 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - 25 Juli 2016 |
Abstract
Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge because they cannot be interfaced to light, the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediate such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to the generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
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in: Physical Review A, Jahrgang 94, Nr. 1, 012340, 25.07.2016.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Measurement-induced long-distance entanglement of superconducting qubits using optomechanical transducers
AU - Černotík, Ondřej
AU - Hammerer, Klemens
N1 - Funding information: We thank Pertti Hakonen for useful discussions and Emil Zeuthen for critical reading of the manuscript. This work was funded by the European Commission (FP7-Programme) through iQUOEMS (Grant Agreement No. 323924). We acknowledge support by DFG through QUEST and by the cluster system team at the Leibniz University Hannover.
PY - 2016/7/25
Y1 - 2016/7/25
N2 - Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge because they cannot be interfaced to light, the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediate such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to the generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.
AB - Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge because they cannot be interfaced to light, the medium used to send quantum signals through channels at room temperature. We show that mechanical oscillators can mediate such coupling and light can be used to measure the joint state of two distant qubits. The measurement provides information on the total spin of the two qubits such that entangled qubit states can be postselected. Entanglement generation is possible without ground-state cooling of the mechanical oscillators for systems with optomechanical cooperativity moderately larger than unity; in addition, our setup tolerates a substantial transmission loss. The approach is scalable to the generation of multipartite entanglement and represents a crucial step towards quantum networks with superconducting circuits.
UR - http://www.scopus.com/inward/record.url?scp=84979937606&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.94.012340
DO - 10.1103/PhysRevA.94.012340
M3 - Article
AN - SCOPUS:84979937606
VL - 94
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 1
M1 - 012340
ER -