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Improving the gate fidelity of capacitively coupled spin qubits
Xin Wang, Edwin Barnes, S. Das Sarma
Capacitively coupled semiconductor spin qubits hold promise as the building blocks of a scalable quantum computing architecture with long-range coupling between distant qubits. How…
Analytical approach to swift nonleaky entangling gates in superconducting qubits
Sophia E. Economou, Edwin Barnes
We develop schemes for designing pulses that implement fast and precise entangling quantum gates in superconducting qubit systems despite the presence of nearby harmful transitions…
Interacting Dirac liquid in three-dimensional semimetals
Johannes Hofmann, Edwin Barnes, S. Das Sarma
We study theoretically the properties of the interacting Dirac liquid, a novel three-dimensional many-body system which was recently experimentally realized and in which the electr…
Robust quantum control using smooth pulses and topological winding
Edwin Barnes, Xin Wang, S. Das Sarma
The greatest challenge in achieving the high level of control needed for future technologies based on coherent quantum systems is the decoherence induced by the environment. Here,…
Noise-compensating pulses for electrostatically controlled silicon spin qubits
Xin Wang, Fernando A. Calderon-Vargas, Muhed S. Rana +3
We study the performance of SUPCODE---a family of dynamically correcting pulses designed to cancel simultaneously both Overhauser and charge noise for singlet-triplet spin qubits--…
Why does graphene behave as a weakly interacting system?
Johannes Hofmann, Edwin Barnes, S. Das Sarma
We address the puzzling weak-coupling perturbative behavior of graphene interaction effects as manifested experimentally, in spite of the effective fine structure constant being la…