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Category: quantum physics

Scientists at the Energy Department’s National Renewable Energy Laboratory (NREL) discovered a use for perovskites that runs counter to the intended usage of the hybrid organic-inorganic material.

Considerable research at NREL and elsewhere has been conducted into the use of organic-inorganic hybrid perovskites as a solar cell. Perovskite systems have been shown to be highly efficient at converting sunlight to electricity. Experimenting on a lead-halide perovskite, NREL researchers found evidence the material could have great potential for optoelectronic applications beyond photovoltaics, including in the field of quantum computers.

Today, Nature Communications published the research, Large Polarization-Dependent Exciton Optical Stark Effect in Lead Iodide Perovskites. Authors of the paper are Ye Yang, Mengjin Yang, Kai Zhu, Justin Johnson, Joseph Berry, Jao van de Lagemaat, and Matthew Beard.

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Additional insights on QSS planned efforts; and (as with any government program) there is more to this program than these insights.

While China’s quantum science satellite (QSS) project is part of the Strategic Priority Programme on Space Science, the country’s first space exploration programme intended purely for scientific research, its experiments have significant military implications.

By Michael Raska

On August 16, 2016 China launched the world’s first quantum communications experiment satellite into orbit from the Jiuquan Satellite Launch Centre in the Gobi Desert. The small satellite, recently named Micius after an ancient Chinese philosopher, is tasked to establish a hack-proof communication line – a quantum key distribution network, while performing a series of quantum entanglement experiments in space for the first time.

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Computadores qu nticos estão chegando. O mundo pode não estar pronto.
A mec nica qu ntica, Carl Sagan observou certa vez, é tão estranho que o “senso comum é quase inútil em se aproximar dela.” Os cientistas ainda não entendem exatamente por que a matéria se comporta como faz no nível qu ntico. No entanto, eles estão ficando melhor a exploração dos seus din mica peculiar — de maneiras que podem em breve revolucionando o negócio tecnoloco.

Não é surpresa, então, o investimento no campo está crescendo. IBM, Microsoft e Google são todos construção de laboratórios de pesquisa qu ntica. Startups estão se preparando. Os bancos estão muito interessados na verdade. Governos ver aplicações para a exploração espacial, a investigação médica e de coleta de inteligência. Agência de Segurança Nacional dos Estados Unidos, na verdade, foi discretamente tentando construir um computador qu ntico, durante anos, na esperança de que ele iria fazer um código-breaker imparável.

Via Bloomberg.

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https://youtube.com/watch?v=6VIAL8gQRTI

Rose’s Law for Quantum Computing highlights the new platforms sheer power to solve humanity’s and society’s most complex problems on, and off, Earth

When Steve Jurvetson, Managing Director of the investment firm Draper Fisher Jurvetson (DJF) first met Geordie Rose, now CTO and former CEO of D-Wave back in 2002 he was struck by his ability to explain complex quantum physics and the “spooky” underpinnings of a new class of computing platform – Quantum Computing.

DFJ first invested in D-Wave in 2003, and Rose predicted that he would be able to demonstrate a two-bit quantum computer within 6 months – years, if not decades ahead of the competition and there was a certain precision to his predictions. With one bit under his belt, and a second coming, Rose went on to suggest that the number of qubits in a scalable quantum computing architecture should double every year. Sound familiar?

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String theory arrived in the public field in 1988 when a BBC radio series Desperately Seeking Superstrings was aired. Thanks to good marketing and its naturally curious name and characteristics, it is now part of popular discourse, mentioned in TV’s Big Bang Theory, Woody Allen stories, and countless science documentaries.

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Another approach to QC; the title of the article is misleading because you still are using quantum properties in the approach.

Researchers at Aalto University have demonstrated the suitability of microwave signals in the coding of information for quantum computing. Previous development of the field has been focusing on optical systems. Researchers used a microwave resonator based on extremely sensitive measurement devices known as superconductive quantum interference devices (SQUIDs). In their studies, the resonator was cooled down and kept near absolute zero, where any thermal motion freezes. This state corresponds to perfect darkness where no photon — a real particle of electromagnetic radiation such as visible light or microwaves — is present.

However, in this state (called quantum vacuum) there exist fluctuations that bring photons in and out of existence for a very short time. The researchers have now managed to convert these fluctuations into real photons of microwave radiation with different frequencies, showing that, in a sense, darkness is more than just absence of light.

They also found out that these photons are correlated with each other, as if a magic connection exists between them.

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Making a more ultrafast optical switch and can be used to control or address individual spin states, which is needed for spin-based quantum computing.

August 31, 2016.

NREL scientists Ye Yang and Matt Beard stand in front of a transient absorption spectrometer in their laser lab.

Scientists at the Energy Department’s National Renewable Energy Laboratory (NREL) discovered a use for perovskites that runs counter to the intended usage of the hybrid organic-inorganic material.

Read more