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Supercompact Photonic Quantum Logic Gate on a Silicon Chip.
- Source :
-
Physical Review Letters . 4/2/2021, Vol. 126 Issue 13, p1-1. 1p. - Publication Year :
- 2021
-
Abstract
- To build universal quantum computers, an essential step is to realize the so-called controlled-NOT (CNOT) gate. Quantum photonic integrated circuits are well recognized as an attractive technology offering great promise for achieving large-scale quantum information processing, due to the potential for high fidelity, high efficiency, and compact footprints. Here, we demonstrate a supercompact integrated quantum CNOT gate on silicon by using the concept of symmetry breaking of a six-channel waveguide superlattice. The present path-encoded quantum CNOT gate is implemented with a footprint of 4.8×4.45 μm² (∼3λ×3λ) as well as a high-process fidelity of ∼0.925 and a low excess loss of <0.2 dB. The footprint is shrunk significantly by ∼10 000 times compared to those previous results based on dielectric waveguides. This offers the possibility of realizing practical large-scale quantum information processes and paving the way to the applications across fundamental science and quantum technologies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 126
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 149722561
- Full Text :
- https://doi.org/10.1103/PhysRevLett.126.130501