Speaker
Description
Pulse-level control of variational algorithms can be used to design hardware-efficient ansatzes capable of implementing Quantum Approximate Optimization Algorithms (QAOA) [1]. We study the framework in the context of qudits which are defined as controllable modes on superconducting radio frequency (SRF) 3D cavity-qubit systems. The SRF cavities have long coherence time and can support manipulations of thousands of photons in interaction with qubits [2]. Starting from the universal control of single qudit operations, which has already been proven and experimentally demonstrated [3, 4, 5], we study the case of how to implement multiqudit gates via numerical pulse engineering [6, 7, 8], and we discuss the indicative expectations of fidelity and algorithmic performance for a 3D SRF-cavity-transmon quantum computer.
References
[1] PRX Quantum 2, 010101 (2021).
[2] Phys. Rev. Applied 13, 034032 (2020).
[3] Physical Review A 92, 040303 (2015).
[4] Physical review letters 115, 137002 (2015).
[5] arXiv:2004.14256
[6] Science Bulletin 66, 1789-1805 (2021).
[7] arXiv:2001.01013
[8] arXiv:2106.14310