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Article
Truncated nuclear norm matrix recover algorithm for direction-of-arrival estimation
The received signal may suffer from continuous missing data due to reasons such as antenna damage, which affects the performance of the direction-of-arrival (DOA) estimation. In order to achieve a better DOA e...
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Article
Open AccessIntegrated and DC-powered superconducting microcomb
Frequency combs, specialized laser sources emitting multiple equidistant frequency lines, have revolutionized science and technology with unprecedented precision and versatility. Recently, integrated frequency...
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Article
Intracranial penetrating injury by clothes fork in an infant: case report and review of the literature
Nonmissile intracranial penetrating injury (IPI) in pediatric population is rare. Here, we report the exceedingly rare case of a 5-month-old infant sustained by a metallic clothes fork penetrating into his lef...
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Article
Fabrication of Al/AlOx/Al Josephson junctions on silicon and sapphire substrates using a cold-development technique
In order to obtain high-quality superconducting qubits, we employed a cold-development technique, using temperatures down to −20°C, to fabricate Al/AlOx/Al Josephson junctions. Cold development greatly reduced th...
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Article
Open AccessSimulating the Kibble-Zurek mechanism of the Ising model with a superconducting qubit system
The Kibble-Zurek mechanism (KZM) predicts the density of topological defects produced in the dynamical processes of phase transitions in systems ranging from cosmology to condensed matter and quantum materials...
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Article
Open AccessObservation of coherent oscillation in single-passage Landau-Zener transitions
Landau-Zener transition (LZT) has been explored in a variety of physical systems for coherent population transfer between different quantum states. In recent years, there have been various proposals for applyi...
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Article
Spectrum of a superconducting phase qubit coupled to a microscopic two-level system
We measured experimentally the spectrum of a superconducting phase qubit. An avoided energy-level crossing is obviously observed, which is due to the coupling to a microscopic two-level system. With different ...
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Article
Dynamics of a qubit—TLS system under resonant microwave driving
We demonstrate the effect of different coupling strengths between a microscopic two-level system (TLS) and a microwave field on the dynamics of a qubit—TLS system when the bipartite system is subject to resona...
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Article
A multi-functional superconductor single-photon detector at telecommunication wavelength
A multi-functional single-photon detector was demonstrated to resolve photon states by multiple superconductor single photon detectors (SSPDs) system with improved readout settings. The photon number and space...
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Article
Open AccessCharacter and fabrication of Al/Al2O3/Al tunnel junctions for qubit application
The superconductive Josephson junction is the key device for superconducting quantum computation. We have fabricated Al/Al2O3/Al tunnel junctions using a double angle evaporation method based on a suspended shado...
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Article
Open AccessTunable quantum beam splitters for coherent manipulation of a solid-state tripartite qubit system
Coherent control of quantum states is at the heart of implementing solid-state quantum processors and testing quantum mechanics at the macroscopic level. Despite significant progress made in recent years in co...
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Article
Quasi-particle injection into YBa2Cu3O7-δ micro-bridge
Several types of quasi-particle injections into YBa2Cu3O7−δ (YBCO) micro-bridge have been studied, revealing the quasi-particle non-equilibrium effect, the current superposition effect and the heating effect. The...
