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Robust quantum gates for singlet-triplet spin qubits using composite pulses
Xin Wang, Lev S. Bishop, Edwin Barnes +2
We present a comprehensive theoretical treatment of SUPCODE, a method for generating dynamically corrected quantum gate operations, which are immune to random noise in the environm…
Robust Two-Qubit Gates for Exchange-Coupled Qubits
F. Setiawan, Hoi-Yin Hui, J. P. Kestner +2
We present composite pulse sequences that perform fault-tolerant two-qubit gate operations on exchange-only quantum dot spin qubits in various experimentally relevant geometries. W…
Exact Classification of Landau-Majorana-Stückelberg-Zener Resonances By Floquet Determinants
Sriram Ganeshan, Edwin Barnes, S. Das Sarma
Recent experiments have shown that Landau-Majorana-Stuckelberg-Zener (LMSZ) interferometry is a powerful tool for demonstrating and exploiting quantum coherence not only in atomic…
Hyperfine interaction induced dephasing of coupled spin qubits in semiconductor double quantum dots
Jo-Tzu Hung, Łukasz Cywiński, Xuedong Hu +1
We investigate theoretically the hyperfine-induced dephasing of two-electron-spin states in a double quantum dot with a finite singlet-triplet splitting J. In particular, we derive…
Dynamically corrected gates for an exchange-only qubit
G. T. Hickman, Xin Wang, J. P. Kestner +1
We provide analytical composite pulse sequences that perform dynamical decoupling concurrently with arbitrary rotations for a qubit coded in the spin state of a triple quantum dot.…
Topological Zero-Energy Modes in Gapless Commensurate Aubry-André-Harper Models
Sriram Ganeshan, Kai Sun, S. Das Sarma
The Aubry-André or Harper (AAH) model has been the subject of extensive theoretical research in the context of quantum localization. Recently, it was shown that one-dimensional qua…