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6 papers · 1 filter
Geometric phase shift in quantum computation using superconducting nanocircuits: nonadiabatic effects
Shi-Liang Zhu, Z. D. Wang
The nonadiabatic geometric quantum computation may be achieved using coupled low-capacitance Josephson juctions. We show that the nonadiabtic effects as well as the adiabatic condi…
Universal quantum gates based on a pair of orthogonal cyclic states: Application to NMR systems
Shi-Liang Zhu, Z. D. Wang
We propose an experimentally feasible scheme to achieve quantum computation based on a pair of orthogonal cyclic states. In this scheme, quantum gates can be implemented based on t…
Conductance of a Quantum Point Contact in the presence of a Scanning Probe Microscope Tip
Guang-Ping He, Shi-Liang Zhu, Z. D. Wang
Using the recursive Green's function technique, we study the coherent electron conductance of a quantum point contact in the presence of a scanning probe microscope tip. Images of…
Charge pumping in a quantum wire driven by a series of local time-periodic potentials
Shi-Liang Zhu, Z. D. Wang
We develop a method to calculate electronic transport properties through a mesoscopic scattering region in the presence of a series of time-periodic potentials. Using the method, t…
Conductance of a quantum point contact in the presence of spin-orbit interaction
Shi-Liang Zhu, Z. D. Wang, Lian Hu
A recursive Green's function technique is developed to calculate the spin-dependent conductance in mesoscopic structures. Using this technique, we study the spin-dependent electron…
Implementation of universal quantum gates based on nonadiabatic geometric phases
Shi-Liang Zhu, Z. D. Wang
We propose an experimentally feasible scheme to achieve quantum computation based on nonadiabatic geometric phase shifts, in which a cyclic geometric phase is used to realize a set…