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5 papers · 2 filters
Fast non-Abelian geometric gates via transitionless quantum driving
J. Zhang, Thi Ha Kyaw, D. M. Tong +2
A practical quantum computer must be capable of performing high fidelity quantum gates on a set of quantum bits (qubits). In the presence of noise, the realization of such gates po…
Effect of Local Channels on Quantum Steering Ellipsoids
Xueyuan Hu, Heng Fan
The effect of a local trace-preserving single-qubit channel on a two-qubit state is investigated in the picture of the quantum steering ellipsoids (QSE). The phenomenon of locally…
Theorem on the existence of a nonzero energy gap in adiabatic quantum computation
Da-Jian Zhang, Xiao-Dong Yu, D. M. Tong
Adiabatic quantum computation, based on the adiabatic theorem, is a promising alternative to conventional quantum computation. The validity of an adiabatic algorithm depends on the…
Completely positive maps within the framework of direct-sum decomposition of state space
Longjiang Liu, D. M. Tong
We investigate completely positive maps for an open system interacting with its environment. The families of the initial states for which the reduced dynamics can be described by a…
Coexistence of Kochen-Specker inequalities and noncontextuality inequalities
Xiao-Dong Yu, D. M. Tong
Two types of inequalities, Kochen-Specker inequalities and noncontextuality inequalities, are both used to demonstrate the incompatibility between the noncontextual hidden variable…