Effects of charge noise on a pulse-gated singlet-triplet S−T− qubit

We study the dynamics of a pulse-gated semiconductor double-quantum-dot qubit. In our experiments, the qubit coherence times are relatively long, but the visibility of the quantum oscillations is low. We show that these observations are consistent with a theory that incorporates decoherence arising from charge noise that gives rise to detuning fluctuations of the double dot. Because effects from charge noise are largest near the singlet-triplet avoided level crossing, the visibility of the oscillations is low when the singlet-triplet avoided level crossing occurs in the vicinity of the charge degeneracy point crossed during the manipulation, but there is only modest dephasing at the large detuning value at which the quantum phase accumulates. This theory agrees well with experimental data and predicts that the visibility can be increased greatly by appropriate tuning of the interdot tunneling rate

Synthesis and photovoltaic effect study for fullerene complexe C60Pd(Ph2PCH2PPh2)

Fulerene complexe C-60 Pd (Ph2PCH2PPh2) was perpared by the method of ligand substitution via the reaction of C-60 with Pd(Ph2PCH2PPh2)(2) under condition of a nitrogen atmosphere and refluxing, and the title compound was appraised and characterized by methods of elemental analysis, FT-IR, UV-vis, XPS and XRD. The results showed that the structure of purposeful product was that the Ph2PCH2PPh2 took up two coordination sites of the central metal, and C-60 took up another two sites in sigma-pi feeback pattern. The porperties on photoelectricity, redox and thermostability of the tide complexe were studied. The results of studying on photoclectricity showed that the photovoltaic effect of (n + n) heterojunction electrode formed by C60Pd(Ph2PCH2PPh2)/GaAs was supper, especially in the BQ/H(2)Q redox couple, and the greatest value of photovoltaic potential was up to 174 mV. The photovoltaic performance of C60Pd (Ph2PCH2PPh2)/GaAs electrode at 1 mum for thickness of C60Pd(Ph2PCH2PPh2) film was the best

A Hierarchical Vision-Based UAV Localization for an Open Landing

The localization of unmanned aerial vehicles (UAVs) for autonomous landing is challenging because the relative positions of the landing objects are almost inaccessible and the objects have nearly no transmission with UAVs. In this paper, a hierarchical vision-based localization framework for rotor UAVs is proposed for an open landing. In such a hierarchical framework, the landing is defined into three phases: “Approaching”, “Adjustment”, and “Touchdown”. Object features at different scales can be extracted from a designed Robust and Quick Response Landing Pattern (RQRLP) and the corresponding detection and localization methods are introduced for the three phases. Then a federated Extended Kalman Filter (EKF) structure is costumed and utilizes the solutions of the three phases as independent measurements to estimate the pose of the vehicle. The framework can be used to integrate the vision solutions and enables the estimation to be smooth and robust. In the end, several typical field experiments have been carried out to verify the proposed hierarchical vision framework. It can be seen that a wider localization range can be extended by the proposed framework while the precision is ensured

Synthesis and photoelectric property for the fullerene complex C60Pd(Ph2PCH2CH2CH2CH2PPh2)

Fullerene complexe C60Pd(Ph2PCH2CH2CH2CH2PPh2) was prepared by replacement reaction in inert atmosphere and characterized by elemental analysis, IR, electronic spectroscopy, XPS and XRD. At the same time, the properties on redox and thermostability of the product were studied. The photoltaic effect of C60Pd (Ph2PCH2CH2CH2CH2PPh2) complex on GaAs electrode formation n+n heterojunction in photoelectrochemical cell H H I was investigated. The results show that the photoelectric property of CPd(Ph2PCH2C2CH2C2PPh2) is excellent, especially in the BQ/H(2)Q redox couple mediator. The photovoltaic property of C60Pd(Ph2PCH2CH2CH2PPh2)GaAs electrode at 1 mu m for thickness of C60Pd(Ph2PCH2CH2CH2CH2PPh2) is the best, the photopotential value is up to 212 mV

Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)

In 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Thus, it is important to formulate on a regular basis updated guidelines for monitoring autophagy in different organisms. Despite numerous reviews, there continues to be confusion regarding acceptable methods to evaluate autophagy, especially in multicellular eukaryotes. Here, we present a set of guidelines for investigators to select and interpret methods to examine autophagy and related processes, and for reviewers to provide realistic and reasonable critiques of reports that are focused on these processes. These guidelines are not meant to be a dogmatic set of rules, because the appropriateness of any assay largely depends on the question being asked and the system being used. Moreover, no individual assay is perfect for every situation, calling for the use of multiple techniques to properly monitor autophagy in each experimental setting. Finally, several core components of the autophagy machinery have been implicated in distinct autophagic processes (canonical and noncanonical autophagy), implying that genetic approaches to block autophagy should rely on targeting two or more autophagy-related genes that ideally participate in distinct steps of the pathway. Along similar lines, because multiple proteins involved in autophagy also regulate other cellular pathways including apoptosis, not all of them can be used as a specific marker for bona fide autophagic responses. Here, we critically discuss current methods of assessing autophagy and the information they can, or cannot, provide. Our ultimate goal is to encourage intellectual and technical innovation in the field