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7 papers · 2 filters
Quantum interference induced by multiple Landau-Zener transitions in a strongly driven rf-SQUID qubit
Yiwen Wang, Shanhua Cong, Xueda Wen +7
We irradiated an rf-SQUID qubit with large-amplitude and high frequency electromagnetic field. Population transitions between macroscopic distinctive quantum states due to Landau-Z…
Hierarchical quantum information splitting
Xin-Wen Wang, Li-Xin Xia, Zhi-Yong Wang
We present a scheme for asymmetric quantum information splitting, where a sender distributes asymmetrically a qubit to distant agents in a network. The asymmetric distribution lead…
Quantum Jump Approach to Switching Process of a Josephson Junction Coupled to a Microscopic Two-Level System
Xueda Wen, Yiwen Wang, Ning Dong +6
With microwave irradiation, the switching current of a Josephson junction coupled to a microscopic two-level system jumps randomly between two discrete states. We modeled the switc…
Landau-Zener Interference in Multilevel Superconducting Flux Qubits Driven by Large Amplitude Fields
Xueda Wen, Yang Yu
We proposed an analytical model to analyze the Landau-Zener interference in a multilevel superconducting flux qubit driven by large amplitude external fields. Our analytical result…
Dark Periods in Rabi Oscillations of Superconducting Phase Qubit Coupled to a Microscopic Two-Level System
Xueda Wen, Shi-Liang Zhu, Yang Yu
We proposed a scheme to demonstrate macroscopic quantum jumps in a superconducting phase qubit coupled to a microscopic two-level system in the Josephson tunnel junction. Irradiate…
Quasi-Hamiltonian Method for Computation of Decoherence Rates
Robert Joynt, Dong Zhou, Qiang-Hua Wang
For many implementations of quantum computing, 1/f and other types of broad-spectrum noise are an important source of decoherence. An important step forward would be the ability to…