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Crosstalk error correction through dynamical decoupling of single-qubit gates in capacitively coupled singlet-triplet semiconductor spin qubits
Donovan Buterakos, Robert E. Throckmorton, S. Das Sarma
In addition to magnetic field and electric charge noise adversely affecting spin qubit operations, performing single-qubit gates on one of multiple coupled singlet-triplet qubits p…
Building topological quantum circuits: Majorana nanowire junctions
Tudor D. Stanescu, Sankar Das Sarma
Topological quantum computation using non-Abelian Majorana zero modes localized in proximitized semiconductor nanowires requires careful electrostatic control of wire-junctions so…
Fast pulse sequences for dynamically corrected gates in single-triplet qubits
Robert E. Throckmorton, Chengxian Zhang, Xu-Chen Yang +3
We present a set of experimentally feasible pulse sequences that implement any single-qubit gate on a singlet-triplet spin qubit and demonstrate that these new sequences are up to…
Conductance interference in a superconducting Coulomb blockaded Majorana ring
Ching-Kai Chiu, Jay D. Sau, S. Das Sarma
By tuning the magnetic flux, the two ends of a 1D topological superconductor weakly coupled to a normal metal as a ring-shaped junction can host split Majorana zero modes (MZMs). W…
Electron temperature and tunnel coupling dependence of zero-bias and almost-zero-bias conductance peaks in Majorana nanowires
F. Setiawan, Chun-Xiao Liu, Jay D. Sau +1
A one-dimensional semiconductor nanowire proximitized by a nearby superconductor may become a topological superconductor hosting localized Majorana zero modes at the two wire ends…
Decoherence of two coupled singlet-triplet spin qubits
Yang-Le Wu, S. Das Sarma
We study a pair of capacitively coupled singlet-triplet spin qubits. We characterize the two-qubit decoherence through two complementary measures, the decay time of coupled-qubit o…