Errors in quantum computers are an obstacle for their widespread use. But a team of scientists say that, by using an antimony atom and the Schrödinger’s Cat thought experiment, they could have found a way to stop them.
Category: computing – Page 88
Anomalous Hall torque: ‘Brand new physics’ for next-generation spintronics
Our data-driven world demands more—more capacity, more efficiency, more computing power. To meet society’s insatiable need for electronic speed, physicists have been pushing the burgeoning field of spintronics.
Traditional electronics use the charge of electrons to encode, store and transmit information. Spintronic devices utilize both the charge and spin-orientation of electrons. By assigning a value to electron spin (up=0 and down=1), spintronic devices offer ultra-fast, energy-efficient platforms.
To develop viable spintronics, physicists must understand the quantum properties within materials. One property, known as spin-torque, is crucial for the electrical manipulation of magnetization that’s required for the next generation of storage and processing technologies.
Revolutionizing Quantum Science: The Secret of Long-Lasting Molecular Entanglement
Researchers have revolutionized quantum technology by achieving long-lasting entanglement between molecules using ‘magic-wavelength optical tweezers.’
This breakthrough enhances the potential for quantum computing.
Performing computation using quantum-mechanical phenomena such as superposition and entanglement.
The Year Ahead: Promise For Quantum Growth
IonQ fired the first shot in the M&A opportunities for quantum startups back in 2021, becoming the first publicly traded pure-play quantum computing company. In late 2024, IonQ filed to acquire Qubitekk as part of its strategy to apply distributed computer development as a means to progress toward a CRQC computer in data centers.
I predict that IonQ, among others in the space, has just begun its M&A program.
Expect to see acquisitions, mergers and joint ventures across geographies in the coming year, with several interesting possibilities in Europe.
‘Magic-wavelength optical tweezers’ achieve quantum entanglement of molecules
Harnessing molecular connections: unlocking long-lasting quantum entanglement.
Quantum entanglement—the mysterious connection that links particles no matter the distance between them—is a cornerstone for developing advanced technologies like quantum computing and precision measurement tools. While significant strides have been made in controlling simpler particles such as atoms, extending this control to more complex systems like molecules has remained challenging due to their intricate structures and sensitivity to their surroundings.
In a groundbreaking study, researchers have achieved long-lived quantum entanglement between pairs of ultracold polar molecules using a highly controlled environment known as “magic-wavelength optical tweezers.” These tweezers manipulate molecules with extraordinary precision, stabilizing their complex internal states, such as vibrations and rotations, while enabling detectable, fine-scale interactions.
The team successfully created a “Bell state,” a hallmark of quantum entanglement, with pairs of molecules. While some minor errors reduced the initial fidelity of the entangled state, correcting for these issues revealed that the entanglement could persist for remarkably long times—measured in seconds. This is a significant achievement, as second-scale lifetimes are exceptional in the quantum realm.
This breakthrough has far-reaching implications. Long-lived molecular entanglement could enhance quantum sensing technologies, provide new avenues for exploring chemical reactions at ultracold temperatures, and expand the potential of molecules as quantum bits (qubits) in simulations and memory storage for quantum computing. By unlocking the ability to precisely control and entangle molecules, scientists are paving the way for novel applications across quantum science, leveraging the rich internal dynamics of molecular systems.
Researchers at Durham University have successfully demonstrated long-lasting quantum entanglement between molecules, opening new doors for future advancements in quantum computing, sensing, and fundamental physics. The paper is published in the journal Nature.
Silicon Photonics Breakthrough: The “Last Missing Piece” Now a Reality
International research team unveils the first electrically pumped continuous-wave semiconductor laser designed for seamless integration with silicon.
Scientists from Forschungszentrum Jülich (FZJ), the University of Stuttgart, the Leibniz Institute for High Performance Microelectronics (IHP), and their French partner CEA-Leti have successfully developed the first electrically pumped continuous-wave semiconductor laser made entirely from group IV elements, commonly referred to as the “silicon group” in the periodic table.
This innovative laser is constructed from stacked ultrathin layers of silicon-germanium-tin and germanium-tin. Remarkably, it is the first laser of its type to be directly grown on a silicon wafer, paving the way for advancements in on-chip integrated photonics. The research findings have been published in the prestigious journal Nature Communications.
UK hits world-first quantum entanglement of molecules at 92% fidelity
UK researchers used special optical tweezers to attain quantum entanglement of molecules that could unlock multiple applications in quantum computing.
