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16 papers · 2 filters
High-fidelity adiabatic inversion of a electron spin qubit in natural silicon
Arne Laucht, Rachpon Kalra, Juha T. Muhonen +7
The main limitation to the high-fidelity quantum control of spins in semiconductors is the presence of strongly fluctuating fields arising from the nuclear spin bath of the host ma…
Robust two-qubit gates for donors in silicon controlled by hyperfine interactions
Rachpon Kalra, Arne Laucht, Charles Hill +1
We present two strategies for performing two-qubit operations on the electron spins of an exchange-coupled pair of phosphorus donors in silicon, using the ability to set the donor…
Probing zero-modes of defect in Kitaev quantum wire
Sheng-Wen Li, Zeng-Zhao Li, C. Y. Cai +1
The Kitaev quantum wire (KQW) model with open boundary possesses two Majorana edge modes. When the local chemical potential on a defect site is much higher than that on other sites…
A generic map from non-Lindblad to Lindblad master equations
Michael R. Hush, Igor Lesanovsky, Juan P. Garrahan
Many current problems of interest in quantum non-equilibrium are described by time-local master equations (TLMEs) for the density matrix that are not of the Lindblad form, that is,…
Investigation of nonlinear effects in Josephson parametric oscillators used in circuit QED
Philip Krantz, Yarema Reshitnyk, Waltraut Wustmann +6
We experimentally study the behavior of a parametrically pumped nonlinear oscillator, which is based on a superconducting λ/4 resonator, and is terminated by a flux-tunable SQUID.…
NV-Center Based Digital Quantum Simulation of a Quantum Phase Transition in Topological Insulators
Chenyong Ju, Chao Lei, Xiangkun Xu +3
Nitrogen-vacancy centers in diamond are ideal platforms for quantum simulation, which allows one to handle problems that are intractable theoretically or experimentally. Here we pr…