Arte Rupestre de México Oriental y de Centro América

Este texto tiene carácter bibliográfico. Su propósito es ser una guía para la búsqueda de fuentes de información y ofrecer una introducción al estudio sistemático del arte rupestre en el oriente de México y en Centroamérica. Se dirige tanto a especialistas, estudiantes y aficionados, como a propietarios de arte rupestre o para los indígenas que asuman el rol de "custodios naturales" de sitios con representaciones rupestres. Se presenta el arte rupestre según la distribución política de los estados en el oriente de México y América Central. Los textos se basan en investigaciones propias de los autores e introducen al lector al estado actual de la investigación del arte rupestre en las regiones respectivas. Los autores presentan diferentes estrategias de investigación que dan una visión preliminar y diversa de las imágenes estudiadas.Centroamérica bara México Oriental ra blasi pyua wina wan almuka nani lilka satka nani paskanba. Naha ulbanka na taura wauhtaya wala kum wina wahbi sakan sa, diara kumra luki dauki bangwan ba sika naha nakku upla nani kaiki bangbia bara mahrikaia nahki Centroamerica bara Oriente de México ra blasi pyua wina lilka satka nani paski swinba stadika muni bangbia dukiara. Naha ulbanka na auya naha sat dukia kulka tadi muni uplika nanira, nahamuna sat dukia laik kaiki bangwi uplika nanira, nahamuna sat dukia dawan ka nanira, bara indian nani witing nani kan wina naha sat dukia nani ai tasbaia bilara brih main kaiki uplika nanira sin. Naha blasi wina paski swin dukia nani ba pliki saki bangwisa Centroamerica bara oriente de México ra witing nani nahki ai tasbaia baiki saki bri ba bilara. Naha wauhkataya nani na ulbansa upla kum yakan diara laki kaiki wahbi sakan dawanka bui bara ai kakaira nanira mahrikisa blasi pyua wina lilka satka nani paskan ba stadika ba nahki auya sa sapa naiwa yua kat tasba banira. Diara dawanka nani ba bui witing nanira mahrikisa satka ailal mapara naha lilkika nani kumi bani ba stadi munaia dukiara wiria wan marikisa

Arte Rupestre de México Oriental y de Centro América

This article possesses bibliographical focus. Its purpose is to serve as a guide for the searching of information sources, as well as to offer an introduction to the systematic study of Rupestrian art in Eastern Mexico and Central America. It addresses not only to experts, but also students, amateurs, Rupestrian art owners or the indigenous people who take the responsibility of being "natural guards" of the places with Rupestrian representations. The Rupestrian art is presented according to the political distribution of the Eastern states of Mexico and Central America. The texts, which are based on the author's own researches, introduce the reader to the present form of the Rupestrian art research in the respective regions. The authors expose different research strategies, which provide a preliminary diverse sight of the studied images.   DOI: 10.5377/wani.v57i0.219Wani No.57 2008 pp.60-78Este texto tiene carácter bibliográfico. Su propósito es ser una guía para la búsqueda de fuentes de información y ofrecer una introducción al estudio sistemático del arte rupestre en el oriente de México y en Centroamérica. Se dirige tanto a especialistas, estudiantes y aficionados, como a propietarios de arte rupestre o para los indígenas que asuman el rol de "custodios naturales" de sitios con representaciones rupestres. Se presenta el arte rupestre según la distribución política de los estados en el oriente de México y América Central. Los textos se basan en investigaciones propias de los autores e introducen al lector al estado actual de la investigación del arte rupestre en las regiones respectivas. Los autores presentan diferentes estrategias de investigación que dan una visión preliminar y diversa de las imágenes estudiadas. DOI: 10.5377/wani.v57i0.219Wani No.57 2008 pp.60-78Centroamérica bara México Oriental ra blasi pyua wina wan almuka nani lilka satka nani paskanba. Naha ulbanka na taura wauhtaya wala kum wina wahbi sakan sa, diara kumra luki dauki bangwan ba sika naha nakku upla nani kaiki bangbia bara mahrikaia nahki Centroamerica bara Oriente de México ra blasi pyua wina lilka satka nani paski swinba stadika muni bangbia dukiara. Naha ulbanka na auya naha sat dukia kulka tadi muni uplika nanira, nahamuna sat dukia laik kaiki bangwi uplika nanira, nahamuna sat dukia dawan ka nanira, bara indian nani witing nani kan wina naha sat dukia nani ai tasbaia bilara brih main kaiki uplika nanira sin. Naha blasi wina paski swin dukia nani ba pliki saki bangwisa Centroamerica bara oriente de México ra witing nani nahki ai tasbaia baiki saki bri ba bilara. Naha wauhkataya nani na ulbansa upla kum yakan diara laki kaiki wahbi sakan dawanka bui bara ai kakaira nanira mahrikisa blasi pyua wina lilka satka nani paskan ba stadika ba nahki auya sa sapa naiwa yua kat tasba banira. Diara dawanka nani ba bui witing nanira mahrikisa satka ailal mapara naha lilkika nani kumi bani ba stadi munaia dukiara wiria wan marikisa

Sensing dot with high output swing for scalable baseband readout of spin qubits

A key requirement for quantum computing, in particular for a scalable quantum computing architecture, is a fast and high-fidelity qubit readout. For semiconductor based qubits, one limiting factor is the output swing of the charge sensor. We demonstrate GaAs and Si/SiGe asymmetric sensing dots (ASDs), which exceed the response of a conventional charge sensing dot by more than ten times, resulting in a boosted output swing of $3\,\text{mV}$. This substantially improved output signal is due to a device design with a strongly decoupled drain reservoir from the sensor dot, mitigating negative feedback effects of conventional sensors. The large output signal eases the use of very low-power readout amplifiers in close proximity to the qubit and will thus render true scalable qubit architectures with semiconductor based qubits possible in the future.Comment: 8 pages, 7 figure

Tailoring potentials by simulation-aided design of gate layouts for spin qubit applications

Gate-layouts of spin qubit devices are commonly adapted from previous successful devices. As qubit numbers and the device complexity increase, modelling new device layouts and optimizing for yield and performance becomes necessary. Simulation tools from advanced semiconductor industry need to be adapted for smaller structure sizes and electron numbers. Here, we present a general approach for electrostatically modelling new spin qubit device layouts, considering gate voltages, heterostructures, reservoirs and an applied source-drain bias. Exemplified by a specific potential, we study the influence of each parameter. We verify our model by indirectly probing the potential landscape of two design implementations through transport measurements. We use the simulations to identify critical design areas and optimize for robustness with regard to influence and resolution limits of the fabrication process.Comment: 10 pages, 6 figure

The SpinBus Architecture: Scaling Spin Qubits with Electron Shuttling

Quantum processor architectures must enable scaling to large qubit numbers while providing two-dimensional qubit connectivity and exquisite operation fidelities. For microwave-controlled semiconductor spin qubits, dense arrays have made considerable progress, but are still limited in size by wiring fan-out and exhibit significant crosstalk between qubits. To overcome these limitations, we introduce the SpinBus architecture, which uses electron shuttling to connect qubits and features low operating frequencies and enhanced qubit coherence. Device simulations for all relevant operations in the Si/SiGe platform validate the feasibility with established semiconductor patterning technology and operation fidelities exceeding 99.9 %. Control using room temperature instruments can plausibly support at least 144 qubits, but much larger numbers are conceivable with cryogenic control circuits. Building on the theoretical feasibility of high-fidelity spin-coherent electron shuttling as key enabling factor, the SpinBus architecture may be the basis for a spin-based quantum processor that meets the scalability requirements for practical quantum computing.Comment: 15 pages, 9 figure

El Arte Rupestre de Quintana Roo

This handbook is the first general and detailed work about the largely unknown rock art of East Mexico and Central America. It includes nine regional studies as well as an annotated bibliography which are illustrated by 100 drawings, photographs and maps

Arte rupestre de Yucatán y Campeche

This handbook is the first general and detailed work about the largely unknown rock art of East Mexico and Central America. It includes nine regional studies as well as an annotated bibliography which are illustrated by 100 drawings, photographs and maps