15 papers
Spin Kerr-cat qubits
Z. M. McIntyre, Daniel Loss
The use of noise-robust qubit encodings provides a way of extending the lifetime of quantum information at the hardware level. In this work, we introduce the spin Kerr-cat encoding…
Theory of spin qubits and the path to scalability
Z. M. McIntyre, Abhikbrata Sarkar, Daniel Loss
Spin qubits have emerged as a leading platform for quantum information processing due to their long coherence times, small footprint, and compatibility with the existing semiconduc…
Increasing valley splitting in Si/SiGe by practically achievable heterostructure profiles
Lukas Cvitkovich, Peter Stano, Dominique Bougeard +2
Silicon spin qubits are marred by the valley degeneracy of the conduction band. In a nanodevice, the degeneracy is lifted by interfaces and alloy disorder, but the arising valley s…
Hole-spin qubits in germanium beyond the single-particle regime
Andrea Secchi, Gaia Forghieri, Paolo Bordone +3
The intense simulation efforts on hole-spin qubits in germanium have so far focused primarily on singly occupied quantum dots. Here, we theoretically investigate three-hole qubits…
Inferring charge-noise source locations from correlations in spin qubits
Juan S. Rojas-Arias, Akito Noiri, Jun Yoneda +7
We investigate low-frequency noise in a spin-qubit device made in isotopically purified Si/Si-Ge. Observing sizable cross-correlations among energy fluctuations of different qubits…
Micromagnet-free operation of electron spin qubits in Si/SiGe vertical double quantum dots
Abhikbrata Sarkar, Daniel Loss
We study a vertical double quantum dot (DQD) in a Si/SiGe/Si double-well heterostructure for full electrical control of electron Loss-DiVincenzo (LD) spin qubits, using…