Harvard Semeghini Group Demonstrates Rubidium-87 and Ytterbium-171 Quantum Platform
A dual-species quantum computing platform utilizing Rubidium-87 and Ytterbium-171 has been successfully unveiled by Harvard University scientists, who recorded a coherence time of 14.6(8) seconds for the Ytterbium-171 qubits while concurrently trapping and cooling Rubidium-87 atoms. Optical tweezers of varying wavelengths alongside optical lattice transport are employed by the Semeghini group’s setup to maintain a continuous reload of both elements.
Hardware Innovation in Dual-Species Trapping
The hardware architecture differentiates the setup from approaches focused solely on increasing qubit count. Rubidium’s hydrogen-like atomic structure simplifies initial cooling and trapping procedures. Meanwhile, Ytterbium-171’s long-lived nuclear spin provides a stable storage medium for quantum information.
The platform’s architecture begins with a dual-species Magneto Optical Trap. Both Rubidium and Ytterbium atoms are initially cooled and trapped here before being transported to a glass cell containing the qubit register.
Optical Tweezers Position Atoms Within Trapping Sites
Optical tweezers selectively extract atoms from the transport lattice and position them within element-specific trapping sites. By carefully adjusting specific wavelengths, the team simultaneously cools the atoms and establishes the quantum states utilized for encoding data within the Ytterbium-171 qubits.
Through an averaged fluorescence image, the simultaneous capture of purple Rubidium alongside green Ytterbium atoms is graphically verified, demonstrating that the two species occupy the same location. This hardware combination anticipates a use case where Rubidium atoms serve as rapidly replaced ancilla qubits alongside Ytterbium data qubits. A pre-print detailing the findings is forthcoming on ArXiv.
Frequently Asked Questions About the Harvard Dual-Species Qubits
What are the coherence times achieved by the Ytterbium-171 qubits?
The Ytterbium-171 qubits reached a coherence time of 14.6(8) seconds while researchers simultaneously cooled and trapped Rubidium-87 atoms in the same system.
How does the platform handle the two different atomic species?
The system uses optical lattice transport and multiple wavelengths of optical tweezers to continuously reload both Rubidium-87 and Ytterbium-171 into element-specific trapping sites within a glass cell.
Where will the complete research findings be published?
A pre-print detailing the findings from the Semeghini group at Harvard University is forthcoming on ArXiv.
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