Equação para estimar biomassa da Palmeira Acuri (Attalea phalerata) no Pantanal.

bitstream/CPAP/56115/1/COT63.pdfFolheto Formato Eletrônico

Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform

The possibility to utilize different types of two-qubit gates on a single quantum computing platform adds flexibility in the decomposition of quantum algorithms. A larger hardware-native gate set may decrease the number of required gates, provided that all gates are realized with high fidelity. Here, we benchmark both controlled-Z (CZ) and exchange-type (iSWAP) gates using a parametrically driven tunable coupler that mediates the interaction between two superconducting qubits. Using randomized benchmarking protocols we estimate an error per gate of $0.9\pm0.03\%$ and $1.3\pm0.4\%$ fidelity for the CZ and the iSWAP gate, respectively. We argue that spurious $ZZ$-type couplings are the dominant error source for the iSWAP gate, and that phase stability of all microwave drives is of utmost importance. Such differences in the achievable fidelities for different two-qubit gates have to be taken into account when mapping quantum algorithms to real hardware.Comment: 24 pages, including supplementary informatio

Fitossociologia das espécies lenhosas em campo cerrado no Pantanal de Poconé e Paiaguás.

O presente estudo teve como objetivo avaliar e comparar a composição florística e fitossociológica das espécies lenhosas de campo cerrado, relacionando com características granulométricas do solo. Curatella americana e Byrsonima orbignyana foram as espécies que influenciaram nessa maior similaridade estrutural, pois foram predominantes em todas as áreas estudadas.bitstream/CPAP-2009-09/56803/1/BP81.pd

Fenologia e crescimento de almécega no Pantanal da Nhecolândia, Mato Grosso do Sul.

Os principais eventos fenológicos de Protium heptaphyllum estão relacionados à sazonalidade da precipitação pluviométrica. A espécie apresenta potencial para estudos dendrocronológicos devido à correlação observada do crescimento diamétrico com a precipitação pluviométrica.bitstream/item/79855/1/COT83.pd

Characterization and tomography of a hidden qubit

In circuit-based quantum computing, the available gate set typically consists of single-qubit gates acting on each individual qubit and at least one entangling gate between pairs of qubits. In certain physical architectures, however, some qubits may be 'hidden' and lacking direct addressability through dedicated control and readout lines, for instance because of limited on-chip routing capabilities, or because the number of control lines becomes a limiting factor for many-qubit systems. In this case, no single-qubit operations can be applied to the hidden qubits and their state cannot be measured directly. Instead, they may be controlled and read out only via single-qubit operations on connected 'control' qubits and a suitable set of two-qubit gates. We first discuss the impact of such restricted control capabilities on the quantum volume of specific qubit coupling networks. We then experimentally demonstrate full control and measurement capabilities in a superconducting two-qubit device with local single-qubit control and iSWAP and controlled-phase two-qubit interactions enabled by a tunable coupler. We further introduce an iterative tune-up process required to completely characterize the gate set used for quantum process tomography and evaluate the resulting gate fidelities