A Sympathetic Cooling Scheme with Dual-Isotope Yb+ Ions for Long-Chain Quantum Simulation
ORAL
Abstract
Coupling to hot axial modes can significantly degrade gate fidelity in long, individually addressed trapped-ion chains. To mitigate axial heating, we implement a sympathetic cooling scheme using 172Yb+ coolant ions co-trapped with 171Yb+ qubit ions, which provides favorable radial motional modes in long chains [1].
We benchmark our cooling protocol on a 23-ion dual-isotope Yb+ chain and characterize its performance on both axial and recoil-heated radial modes. We further benchmark digital entangling gates following the cooling sequence. We discuss the prospects of applying our scheme in cryogenic ion-trap systems with intrinsically low idle heating rates. Finally, we present recent progress toward exploiting radial sympathetic cooling and direct qubit-coolant entanglement for non-unitary quantum simulation.
[1] M. Cetina et.al., PRX QUANTUM 3, 010334 (2022).
We benchmark our cooling protocol on a 23-ion dual-isotope Yb+ chain and characterize its performance on both axial and recoil-heated radial modes. We further benchmark digital entangling gates following the cooling sequence. We discuss the prospects of applying our scheme in cryogenic ion-trap systems with intrinsically low idle heating rates. Finally, we present recent progress toward exploiting radial sympathetic cooling and direct qubit-coolant entanglement for non-unitary quantum simulation.
[1] M. Cetina et.al., PRX QUANTUM 3, 010334 (2022).
*This work is supported by the National Science Foundation's Quantum Leap Challenge Institute for Robust Quantum Simulation under Award OMA-2120757 and the NSF STAQ program (Phy-2325080).
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Presenters
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Tianyi Wang
- Duke University