Speaker
Description
For scalable quantum computing based on surface ion-traps high fidelity shuttling is vital for cross register entanglement. A prerequisite for this is qubits with coherence times greater than the shuttling protocol time.
In our architecture we use as computational qubits a microwave driven hyperfine ground state magnetic field sensitive transition of 𝑌𝑏171+, in a linear Paul trap, placed within a magnetic field gradient. This architecture allows low cross talk single qubit gate operation and magnetic gradient induces coupling (MAGIC) for two qubit gates but have comparably low bare coherence times due to its sensitivity to magnetic field fluctuations which may result in insufficient shuttling fidelities. To overcome this challenge recoding the qubit state from the computational qubit to the hyperfine ground state clock transition (storage qubit) with high fidelity single qubit pulses is more promising for coherent shuttling.
In this work we benchmark our single qubit gate performance on the clock and magnetic sensitive transition inside a magnetic field gradient. Prior to that we assess the contribution of the microwave chain to the infidelity at magnetic-field-insensitive conditions.
| Academic level | PhD student |
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