Connect with us

Published

5 hours ago

on

A groundbreaking discovery in graphene research has unveiled a new class of quantum states in a precisely engineered structure. Scientists from the University of British Columbia (UBC), the University of Washington, and Johns Hopkins University identified topological electronic crystals in a twisted bilayer–trilayer graphene system. The structure was created by stacking two-dimensional graphene layers with a slight rotational twist, leading to transformative changes in electronic properties.

Discovery and Methodology

According to a study published in Nature, the system utilises a moiré pattern formed when two graphene layers are misaligned with a small rotational angle. This pattern alters the way electrons move, slowing them down and introducing unique behaviours. Electrons in this twisted configuration exhibit vortex-like motion, revolutionising the understanding of graphene’s electrical properties.
Prof. Joshua Folk, associated with UBC’s Physics and Astronomy Department and the Blusson Quantum Matter Institute, explained to phys.org that the geometric interference effect enables the electrons to freeze into an ordered array while maintaining a synchronised rotational motion. This unique behaviour allows electric current to flow along the edges of the sample while the interior remains non-conductive.

Key Observations and Implications

As per reports, Ruiheng Su, an undergraduate researcher at UBC, observed this phenomenon during experiments on a twisted graphene sample prepared by Dr. Dacen Waters from the University of Washington. The locked yet rotating electron array displayed a paradoxical combination of immobility and conductivity, a property attributed to topology.

Prof. Matthew Yankowitz from the University of Washington highlighted to phs.org, that the edge currents are determined by fundamental constants, remaining unaffected by external disruptions. Such resilience stems from the topology of the system, likened to a Möbius strip where deformation does not alter the intrinsic properties.

Applications in Quantum Information

The discovery is expected to open pathways for advancements in quantum information systems. Coupling topological electronic crystals with superconductivity could enable the creation of robust qubits, paving the way for topological quantum computing. Researchers anticipate that this development will significantly enhance the field of quantum technologies.

Related Topics:
Continue Reading

Science

India’s Gaganyaan project takes a big step with Crew Module launch

Published

4 hours ago

on

January 24, 2025

By

India’s Gaganyaan project takes a big step with Crew Module launch

India’s journey toward human space exploration marked a critical step with the dispatch of the Crew Module for the first uncrewed mission under the Gaganyaan project. The module, integrated with a liquid propulsion system at the Liquid Propulsion Systems Centre (LPSC) in Bengaluru, has been sent to the Satish Dhawan Space Centre in Sriharikota. This development, achieved on 21 January 2025, is part of India’s efforts to attain human spaceflight capabilities.

Liquid Propulsion System Details

As reported by the Economic Times, according to ISRO, the Crew Module Propulsion System (CMPS) incorporates a bi-propellant Reaction Control System (RCS). This system is essential for precise three-axis control—pitch, yaw, and roll—during the descent and re-entry phases. Control operations will commence after the separation of the service module and continue until the parachute-based deceleration system is deployed. The propulsion system includes 12 thrusters, each delivering 100 Newtons of thrust, along with high-pressure gas bottles, a propellant feed mechanism, and associated fluid control components.

Assembly and Integration

The module’s development also involved the integration of the Crew Module Uprighting System (CMUS), designed by the Vikram Sarabhai Space Centre (VSSC). The module will now undergo further assembly processes, including avionics installation, electrical harnessing, and a series of checks at VSSC before its dispatch to the U R Rao Satellite Centre in Bengaluru. The final phase will focus on integrating the Crew Module with the Orbital Module.

ISRO has emphasised that the uncrewed G1 mission is a preparatory step for sending humans to space, enabling the validation of systems and technologies critical to the Gaganyaan project. With this milestone, India edges closer to joining the league of nations with human spaceflight capabilities.

Continue Reading

Science

1.95-Million-Year-Old Evidence of Hominin Activity Discovered in Romania

Published

5 hours ago

on

January 24, 2025

By

1.95-Million-Year-Old Evidence of Hominin Activity Discovered in Romania

Evidence of hominin activity has been discovered in Romania, dating back approximately 1.95 million years, significantly altering the timeline of human presence in Europe. Fossil remains, found at the Grăunceanu site in the Olteț River Valley, have provided the earliest known proof of hominin activity in the region. This discovery indicates that early humans reached Europe around half a million years earlier than previously believed. The findings suggest early hominins adapted to temperate and seasonal environments long before earlier evidence suggested.

Findings from Grăunceanu Fossil Site

According to a study published in Nature Communications, faunal remains from Grăunceanu, part of the Tetoiu Formation, were analysed, showing cut marks consistent with hominin butchery techniques. The research team, led by the Department of Sociology & Anthropology at Ohio University, examined over 4,500 specimens for modifications, including anthropogenic marks. Of these, 20 bones displayed surface marks, with seven being identified as cut-marked with high confidence. These marks were found on animal tibiae and mandibles, demonstrating defleshing practices.

Dating Techniques and Environmental Insights

As reported by phys.org, high-precision laser ablation U-Pb dating was used on dentine samples from the site, providing minimum fossil ages ranging from 2.01 to 1.87 million years, with an average age of 1.95 million years. These findings align with biochronological estimates, establishing Grăunceanu as Europe’s oldest evidence of hominin activity. Isotope analysis of a horse molar suggested a temperate woodland-grassland environment with heavy seasonal rainfall, and faunal remains indicated mild winters, which would have supported hominin habitation during interglacial periods.

Implications for Hominin Migration

The evidence from Grăunceanu challenges previous theories that hominins first established themselves in Georgia, as seen at the Dmanisi site. This discovery implies that early humans dispersed across a broader range of environments earlier than previously understood, demonstrating significant ecological adaptability. The presence of warm-adapted species, such as pangolins and ostriches, further highlights the favourable conditions that may have facilitated this migration.

For the latest tech news and reviews, follow Gadgets 360 on X, Facebook, WhatsApp, Threads and Google News. For the latest videos on gadgets and tech, subscribe to our YouTube channel. If you want to know everything about top influencers, follow our in-house Who’sThat360 on Instagram and YouTube.

Further reading:
Hominin Activity, Romania, Grăunceanu, Early Humans, Fossil Discoveries, Human Migration, Prehistoric Europe, Anthropology, Nature Communications, Ohio University, Dmanisi, Human Evolution

Intelligence Analysis Firm i2 Group Partners Chainalysis to Upgrade Software With Blockchain Technology



Tecno Camon 40 Series Phones Reportedly Spotted on FCC, NBTC Certification Sites

Continue Reading

Science

SpaceX Achieves 400 Orbital Rocket Landings with Falcon 9 and Falcon Heavy

Published

5 hours ago

on

January 24, 2025

By

SpaceX Achieves 400 Orbital Rocket Landings with Falcon 9 and Falcon Heavy

SpaceX marked a significant achievement during the launch of 27 Starlink satellites from California on January 21, 2025. The mission, conducted from Vandenberg Space Force Base, witnessed the Falcon 9 rocket completing a successful return of its first stage to a drone ship positioned at sea. This marked the 400th orbital-class rocket landing for the company, a milestone that underscores the advancements made in reusable spaceflight technology.

Falcon 9 Leads SpaceX’s Reusability Milestones

According, the majority of these 400 landings have been achieved through the Falcon 9 rocket. This workhorse has been central to the company’s missions, with several boosters performing multiple flights. One of the Falcon 9’s first stages holds the record for 25 launches and landings. The focus on reusability has been a cornerstone of SpaceX’s approach to reducing costs and increasing the frequency of space missions.

Falcon Heavy’s Contribution to the Milestone

SpaceX’s powerful Falcon Heavy has also contributed to this achievement. The Falcon Heavy’s design integrates three Falcon 9 boosters, enabling it to execute up to three landings in a single mission. Although the rocket has flown only 11 times to date, it has played a crucial role in advancing the company’s capabilities in heavy-lift missions.

Starship’s Development and Next Steps

As per the reports by space.com, while the milestone did not include landings by SpaceX’s next-generation Starship rocket, progress on the fully reusable vehicle has been noteworthy. The Starship system aims to support human missions to the moon, Mars, and beyond. Recent test flights have showcased the potential of the vehicle, though challenges remain. On January 16, 2025, the Super Heavy booster was successfully caught by the launch tower’s “chopstick” arms, but issues during the upper stage’s flight highlighted areas for improvement.

This achievement reflects SpaceX’s focus on reusable technology, which continues to redefine possibilities in space exploration.

Continue Reading

Trending