Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.030505
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Funding
- U.S. National Science Foundation [PHY-0855632, PHY-0960047]
- MEXT of Japan
- Grants-in-Aid for Scientific Research [23244080] Funding Source: KAKEN
- Division Of Physics
- Direct For Mathematical & Physical Scien [0855632] Funding Source: National Science Foundation
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Scalability and coherence are two essential requirements for the experimental implementation of quantum information and quantum computing. Here, we report a breakthrough toward scalability: the simultaneous generation of a record 15 quadripartite entangled cluster states over 60 consecutive cavity modes (Q modes), in the optical frequency comb of a single optical parametric oscillator. The amount of observed entanglement was constant over the 60 Q modes, thereby proving the intrinsic scalability of this system. The number of observable Q modes was restricted by technical limitations, and we conservatively estimate the actual number of similar clusters to be at least 3 times larger. This result paves the way to the realization of large entangled states for scalable quantum information and quantum computing.
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