6 papers
Noise-Robust Spin-Orbit Qubit in Germanium Holes via p-Orbital Encoding
Yasuo Oda, Jason P. Kestner
Germanium hole spin qubits are a leading platform for semiconductor quantum computation due to their strong spin-orbit coupling, all-electrical operability, and absence of valley d…
Qubit encodings in the p-orbital-valley spectrum for enhanced coherence and tunable two-qubit interaction
John H. Caporaletti, J. P. Kestner
We propose encoding a qubit in a two-level subspace spanned by the lowest -orbital state in the excited valley of an anisotropic quantum dot and the excited -orbital in the g…
Proposed Five-Electron Charge Quadrupole Qubit
John H. Caporaletti, J. P. Kestner
A charge qubit couples to environmental electric field fluctuations through its dipole moment, resulting in fast decoherence. We propose the p orbital (pO) qubit, formed by the sin…
Fast charge noise sensing using a spectator valley state in a singlet-triplet qubit
David W. Kanaar, Yasuo Oda, Mark F. Gyure +1
Semiconductor spin qubits are a promising platform for quantum computing but remain vulnerable to charge noise. Accurate, in situ measurement of charge noise could enable closed-lo…
Optimizing EPR pulses for broadband excitation and refocusing
Eric R. Lowe, Stefan Stoll, J. P. Kestner
In this paper, we numerically optimize broadband pulse shapes that maximize Hahn echo amplitudes. Pulses are parameterized as neural networks (NN), nonlinear amplitude limited Four…
Suppressing Si Valley Excitation and Valley-Induced Spin Dephasing for Long-Distance Shuttling
Yasuo Oda, Merritt P. Losert, Jason P. Kestner
We present a scalable protocol for suppressing errors during electron spin shuttling in silicon quantum dots. The approach maps the valley Hamiltonian to a Landau-Zener problem to…