A quantum-logic gate between distant quantum-network modules
| Autor: | Stefan Langenfeld, Olivier Morin, Emanuele Distante, Stephan Welte, Severin Daiss, Lukas Hartung, Philip Thomas, Gerhard Rempe |
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| Rok vydání: | 2021 |
| Předmět: |
Quantum Physics
Bell state Quantum network Multidisciplinary Computer science business.industry Electrical engineering FOS: Physical sciences Quantum entanglement 01 natural sciences Quantum logic 010309 optics Computer Science::Emerging Technologies Coupling (computer programming) Qubit Computer cluster 0103 physical sciences Hardware_ARITHMETICANDLOGICSTRUCTURES Quantum Physics (quant-ph) 010306 general physics business Quantum computer |
| Zdroj: | Science |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.abe3150 |
| Popis: | The big challenge in quantum computing is to realize scalable multi-qubit systems with cross-talk free addressability and efficient coupling of arbitrarily selected qubits. Quantum networks promise a solution by integrating smaller qubit modules to a larger computing cluster. Such a distributed architecture, however, requires the capability to execute quantum-logic gates between distant qubits. Here we experimentally realize such a gate over a distance of 60m. We employ an ancillary photon that we successively reflect from two remote qubit modules, followed by a heralding photon detection which triggers a final qubit rotation. We use the gate for remote entanglement creation of all four Bell states. Our non-local quantum-logic gate could be extended both to multiple qubits and many modules for a tailor-made multi-qubit computing register. Comment: 9 pages, 4 figures, 3 tables (including Supplemental Material) |
| Databáze: | OpenAIRE |
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