dorsal/arxiv
View SchemaLocal environment can enhance fidelity of quantum teleportation
| Authors | Piotr Badziag, Michal Horodecki, Pawel Horodecki, Ryszard Horodecki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9912098 |
| URL | https://arxiv.org/abs/quant-ph/9912098 |
| DOI | 10.1103/PhysRevA.62.012311 |
Abstract
We show how an interaction with the environment can enhance fidelity of quantum teleportation. To this end, we present examples of states which cannot be made useful for teleportation by any local unitary transformations; nevertheless, after being subjected to a dissipative interaction with the local environment, the states allow for teleportation with genuinely quantum fidelity. The surprising fact here is that the necessary interaction does not require any intelligent action from the parties sharing the states. In passing, we produce some general results regarding optimization of teleportation fidelity by local action. We show that bistochastic processes cannot improve fidelity of two-qubit states. We also show that in order to have their fidelity improvable by a local process, the bipartite states must violate the so-called reduction criterion of separability.
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"abstract": "We show how an interaction with the environment can enhance fidelity of\nquantum teleportation. To this end, we present examples of states which cannot\nbe made useful for teleportation by any local unitary transformations;\nnevertheless, after being subjected to a dissipative interaction with the local\nenvironment, the states allow for teleportation with genuinely quantum\nfidelity. The surprising fact here is that the necessary interaction does not\nrequire any intelligent action from the parties sharing the states. In passing,\nwe produce some general results regarding optimization of teleportation\nfidelity by local action. We show that bistochastic processes cannot improve\nfidelity of two-qubit states. We also show that in order to have their fidelity\nimprovable by a local process, the bipartite states must violate the so-called\nreduction criterion of separability.",
"arxiv_id": "quant-ph/9912098",
"authors": [
"Piotr Badziag",
"Michal Horodecki",
"Pawel Horodecki",
"Ryszard Horodecki"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.012311",
"title": "Local environment can enhance fidelity of quantum teleportation",
"url": "https://arxiv.org/abs/quant-ph/9912098"
},
"schema_id": "dorsal/arxiv",
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"execution_id": "827a1457-ac89-4157-82ea-5fc8eda5c92a",
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