dorsal/arxiv
View SchemaExperimental Quantum Teleportation of a Two-Qubit Composite System
| Authors | Qiang Zhang, Alexander Goebel, Claudia Wagenknecht, Yu-Ao Chen, Bo Zhao, Tao Yang, Alois Mair, Joerg Schmiedmayer, Jian-Wei Pan |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609129 |
| URL | https://arxiv.org/abs/quant-ph/0609129 |
| DOI | 10.1038/nphys417 |
| Journal | Nature Physics 2, 678 - 682 (2006) |
Abstract
Quantum teleportation, a way to transfer the state of a quantum system from one location to another, is central to quantum communication and plays an important role in a number of quantum computation protocols. Previous experimental demonstrations have been implemented with photonic or ionic qubits. Very recently long-distance teleportation and open-destination teleportation have also been realized. Until now, previous experiments have only been able to teleport single qubits. However, since teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation2-5, teleportation of a composite system containing two or more qubits has been seen as a long-standing goal in quantum information science. Here, we present the experimental realization of quantum teleportation of a two-qubit composite system. In the experiment, we develop and exploit a six-photon interferometer to teleport an arbitrary polarization state of two photons. The observed teleportation fidelities for different initial states are all well beyond the state estimation limit of 0.40 for a two-qubit system. Not only does our six-photon interferometer provide an important step towards teleportation of a complex system, it will also enable future experimental investigations on a number of fundamental quantum communication and computation protocols such as multi-stage realization of quantum-relay, fault-tolerant quantum computation, universal quantum error-correction and one-way quantum computation.
{
"annotation_id": "b1376a06-5964-4ea5-8c3e-2931fe557de3",
"date_created": "2026-03-02T18:02:30.150000Z",
"date_modified": "2026-03-02T18:02:30.150000Z",
"file_hash": "482d353809c5cc09d38eac2f229947f4a2c84d9630abd722a90b13fa7c744898",
"private": false,
"record": {
"abstract": "Quantum teleportation, a way to transfer the state of a quantum system from\none location to another, is central to quantum communication and plays an\nimportant role in a number of quantum computation protocols. Previous\nexperimental demonstrations have been implemented with photonic or ionic\nqubits. Very recently long-distance teleportation and open-destination\nteleportation have also been realized. Until now, previous experiments have\nonly been able to teleport single qubits. However, since teleportation of\nsingle qubits is insufficient for a large-scale realization of quantum\ncommunication and computation2-5, teleportation of a composite system\ncontaining two or more qubits has been seen as a long-standing goal in quantum\ninformation science. Here, we present the experimental realization of quantum\nteleportation of a two-qubit composite system. In the experiment, we develop\nand exploit a six-photon interferometer to teleport an arbitrary polarization\nstate of two photons. The observed teleportation fidelities for different\ninitial states are all well beyond the state estimation limit of 0.40 for a\ntwo-qubit system. Not only does our six-photon interferometer provide an\nimportant step towards teleportation of a complex system, it will also enable\nfuture experimental investigations on a number of fundamental quantum\ncommunication and computation protocols such as multi-stage realization of\nquantum-relay, fault-tolerant quantum computation, universal quantum\nerror-correction and one-way quantum computation.",
"arxiv_id": "quant-ph/0609129",
"authors": [
"Qiang Zhang",
"Alexander Goebel",
"Claudia Wagenknecht",
"Yu-Ao Chen",
"Bo Zhao",
"Tao Yang",
"Alois Mair",
"Joerg Schmiedmayer",
"Jian-Wei Pan"
],
"categories": [
"quant-ph"
],
"doi": "10.1038/nphys417",
"journal_ref": "Nature Physics 2, 678 - 682 (2006)",
"title": "Experimental Quantum Teleportation of a Two-Qubit Composite System",
"url": "https://arxiv.org/abs/quant-ph/0609129"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "a6a1ffac-d3aa-44e9-9f8d-39b45802a2e0",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}