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Category: computing – Page 422

A fter schools shifted to an online teaching mode, 17-year-old Nisha Pathak was worried about her increase in screen time. To avoid spending too much time looking at computers and to keep herself active, the Class 12 student of Neeraja Modi school, Jaipur, Rajasthan, took up farming.

“I wanted to keep myself engaged in activities that did not require looking at a screen. Apart from that, I wanted to grow the veggies and distribute them to underprivileged families living near my home,” says Nisha, adding that she learnt how to prepare seeds and plant them from a gardener in her community premises.

Initially, she grew vegetables like potatoes, onions and tomatoes. The harvest was distributed among underprivileged families who were living in neighbouring areas and were unable to procure fresh vegetables regularly.

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City College of New York physicist Pouyan Ghaemi and his research team are claiming significant progress in using quantum computers to study and predict how the state of a large number of interacting quantum particles evolves over time. This was done by developing a quantum algorithm that they run on an IBM quantum computer. “To the best of our knowledge, such particular quantum algorithm which can simulate how interacting quantum particles evolve over time has not been implemented before,” said Ghaemi, associate professor in CCNY’s Division of Science.

Entitled “Probing geometric excitations of fractional quantum Hall states on quantum computers,” the study appears in the journal of Physical Review Letters.

“Quantum mechanics is known to be the underlying mechanism governing the properties of elementary particles such as electrons,” said Ghaemi. “But unfortunately there is no easy way to use equations of quantum mechanics when we want to study the properties of large number of electrons that are also exerting force on each other due to their .”

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“It is very exciting to see this unusual phase of matter realized in an actual experiment, especially because the mathematical description is based on a theoretical ‘extra’ time dimension,” Philipp Dumitrescu, study co-author and research fellow at the Flatiron Institute’s Center for Computational Quantum Physics, told the magazine.

In order to successfully create the topological phase, and thus the “extra” dimension, the scientists targeted a quantum computer’s quantum bits — or qubits — with a quasi-periodic laser pulse based on the Fibonacci sequence. Think quasicrystal.

“The Fibonacci sequence is a non-repeating but also not totally random sequence,” study co-author Andrew Potter, a quantum physicist at the University of British Columbia, told Vice. “Which effectively lets us realize two independent time-dimensions in the system.”

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Samsung has started shipping the world’s first 3-nanometer (nm) chips from its chip-making complex in Hwaseong, South Korea’s Gyeonggi Province, the tech giant revealed on Monday at a ceremony to celebrate the shipment.

The company said its first-generation 3nm process has reduced power consumption by 45 percent and improved performance by 23 percent using gate-all-around (GAA) process, compared to the current 5nm chips using fin field-effect transistor technology (FinFET).

According to Samsung, its engineers started researching on GAA transistors in the early 2000s and went on to experiment with the design from 2017. Last month, the company became the first chipmaker to begin mass production of the 3nm chips.

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