Top Mathematics discussions
NishMath - #quantamagazine
|
Charlie Wood@Quanta Magazine
//
Recent data from the Dark Energy Spectroscopic Instrument (DESI) suggests that dark energy, the mysterious force driving the accelerating expansion of the universe, may be weakening over time. This challenges the standard model of cosmology, which assumes dark energy has a constant density and pressure. Researchers, including Seshadri Nadathur from the DESI collaboration, have analyzed significantly more data than in previous studies, strengthening the conclusion that the engine driving cosmic expansion might be sputtering.
The findings are also supported by evidence from the Dark Energy Survey (DES), which also observed a vast expanse of the cosmos and reported indications of varying dark energy. Miguel Zumalacárregui notes that Euclid's capabilities could better determine the universe's expansion rate through gravitational-wave observations. If confirmed, this would rewrite our understanding of the universe's fate, potentially leading to alternative scenarios beyond the current model of endless expansion and eventual cosmic emptiness.
Share:
References :
Classification:
Webb Wright@Quanta Magazine
//
Researchers are making significant strides in reducing the costs associated with quantum randomness, a crucial element for cryptography and simulations. Traditionally, obtaining true quantum randomness has been complex and expensive. However, the exploration of "pseudorandomness" offers a practical alternative, allowing researchers to utilize computational algorithms that mimic randomness, thus sidestepping the high costs of pure quantum randomness. This development broadens the accessibility of randomness, enabling researchers to pursue new scientific investigations.
The team from JPMorganChase, Quantinuum, multiple national labs, and UT Austin demonstrated a certified quantum randomness protocol. They showcased the first successful demonstration of a quantum computing method to generate certified randomness. Using a 56-qubit quantum machine, they output more randomness than they initially put in. What makes this truly remarkable is that this feat is considered impossible for even the most powerful classical supercomputers. This groundbreaking achievement could open new doors for quantum computing and cryptography research.
Share:
References :
Classification:
Stephen Ornes@Quanta Magazine
//
A novel quantum algorithm has demonstrated a speedup over classical computers for a significant class of optimization problems, according to a recent report. This breakthrough could represent a major advancement in harnessing the potential of quantum computers, which have long promised faster solutions to complex computational challenges. The new algorithm, known as decoded quantum interferometry (DQI), outperforms all known classical algorithms in finding good solutions to a wide range of optimization problems, which involve searching for the best possible solution from a vast number of choices.
Classical researchers have been struggling to keep up with this quantum advancement. Reports of quantum algorithms often spark excitement, partly because they can offer new perspectives on difficult problems. The DQI algorithm is considered a "breakthrough in quantum algorithms" by Gil Kalai, a mathematician at Reichman University. While quantum computers have generated considerable buzz, it has been challenging to identify specific problems where they can significantly outperform classical machines. This new algorithm demonstrates the potential for quantum computers to excel in optimization tasks, a development that could have broad implications across various fields.
Share:
References :
Classification:
|
Blogs
|