Entangling Two Individual Atoms of Different Isotopes via Rydberg Blockade - Archive ouverte HAL Access content directly
Journal Articles Physical Review Letters Year : 2017

Entangling Two Individual Atoms of Different Isotopes via Rydberg Blockade

Abstract

Quantum entanglement is crucial for simulating and understanding exotic physics of strongly correlated many-body systems, such as high--temperature superconductors, or fractional quantum Hall states. The entanglement of non-identical particles exhibits richer physics of strong many-body correlations and offers more opportunities for quantum computation, especially with neutral atoms where in contrast to ions the interparticle interaction is widely tunable by Feshbach resonances. Moreover, the inter-species entanglement forms a basis for the properties of various compound systems, ranging from Bose-Bose mixtures to photosynthetic light-harvesting complexes. So far, the inter-species entanglement has only been obtained for trapped ions. Here we report on the experimental realization of entanglement of two neutral atoms of different isotopes. A ${}^{87}\mathrm{Rb}$ atom and a ${}^{85}\mathrm{Rb}$ atom are confined in two single--atom optical traps separated by 3.8 $\mu$m. Creating a strong Rydberg blockade, we demonstrate a heteronuclear controlled--NOT (C--NOT) quantum gate and generate a heteronuclear entangled state, with raw fidelities $0.73 \pm 0.01$ and $0.59 \pm 0.03$, respectively. Our work, together with the technologies of single--qubit gate and C--NOT gate developed for identical atoms, can be used for simulating any many--body system with multi-species interactions. It also has applications in quantum computing and quantum metrology, since heteronuclear systems exhibit advantages in low crosstalk and in memory protection.

Dates and versions

hal-01644839 , version 1 (22-11-2017)

Identifiers

Cite

Yong Zeng, Peng Xu, Xiaodong He, Yangyang Liu, Min Liu, et al.. Entangling Two Individual Atoms of Different Isotopes via Rydberg Blockade. Physical Review Letters, 2017, 119 (16), ⟨10.1103/PhysRevLett.119.160502⟩. ⟨hal-01644839⟩
56 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More