dorsal/arxiv
View SchemaLong-Distance Quantum Communication with Neutral Atoms
| Authors | Mohsen Razavi, Jeffrey H. Shapiro |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0512128 |
| URL | https://arxiv.org/abs/quant-ph/0512128 |
| DOI | 10.1103/PhysRevA.73.042303 |
Abstract
The architecture proposed by Duan, Lukin, Cirac, and Zoller (DLCZ) for long-distance quantum communication with atomic ensembles is analyzed. Its fidelity and throughput in entanglement distribution, entanglement swapping, and quantum teleportation is derived within a framework that accounts for multiple excitations in the ensembles as well as loss and asymmetries in the channel. The DLCZ performance metrics that are obtained are compared to the corresponding results for the trapped-atom quantum communication architecture that has been proposed by a team from the Massachusetts Institute of Technology and Northwestern University (MIT/NU). Both systems are found to be capable of high-fidelity entanglement distribution. However, the DLCZ scheme only provides conditional teleportation and repeater operation, whereas the MIT/NU architecture affords full Bell-state measurements on its trapped atoms. Moreover, it is shown that achieving unity conditional fidelity in DLCZ teleportation and repeater operation requires ideal photon-number resolving detectors. The maximum conditional fidelities for DLCZ teleportation and repeater operation that can be realized with non-resolving detectors are 1/2 and 2/3, respectively.
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"abstract": "The architecture proposed by Duan, Lukin, Cirac, and Zoller (DLCZ) for\nlong-distance quantum communication with atomic ensembles is analyzed. Its\nfidelity and throughput in entanglement distribution, entanglement swapping,\nand quantum teleportation is derived within a framework that accounts for\nmultiple excitations in the ensembles as well as loss and asymmetries in the\nchannel. The DLCZ performance metrics that are obtained are compared to the\ncorresponding results for the trapped-atom quantum communication architecture\nthat has been proposed by a team from the Massachusetts Institute of Technology\nand Northwestern University (MIT/NU). Both systems are found to be capable of\nhigh-fidelity entanglement distribution. However, the DLCZ scheme only provides\nconditional teleportation and repeater operation, whereas the MIT/NU\narchitecture affords full Bell-state measurements on its trapped atoms.\nMoreover, it is shown that achieving unity conditional fidelity in DLCZ\nteleportation and repeater operation requires ideal photon-number resolving\ndetectors. The maximum conditional fidelities for DLCZ teleportation and\nrepeater operation that can be realized with non-resolving detectors are 1/2\nand 2/3, respectively.",
"arxiv_id": "quant-ph/0512128",
"authors": [
"Mohsen Razavi",
"Jeffrey H. Shapiro"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.042303",
"title": "Long-Distance Quantum Communication with Neutral Atoms",
"url": "https://arxiv.org/abs/quant-ph/0512128"
},
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