Stephan Roche
@StephanSroche
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Physicist - ICREA Research Prof. @icreacommunity @icn2nano @_BIST @ls_quant #quantumtechnologies #quantumcomputing #TopologicalMatter #spintronics #graphene
Barcelona
Joined March 2015
With @foatorres, we present a non-Hermitian framework for modeling state-vector collapse under unified dynamics described by Schrödinger's eq. Chiral state conversion could stand as a mechanism for eliminating superpositions and solve the measurement pb https://t.co/oQn9QpJ8h5
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The theoretical physicists Juan Maldacena and Ying Zhao helped create the “island formula,” a theoretical approach for exploring the interiors of black holes. When this method is applied to a whole universe, a puzzle emerges. https://t.co/HerizwJRbD
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The standard band structure picture cannot be applied to amorphous materials as they lack crystal symmetry. Now a first-principles approach captures the possibility of band-like electron transport in amorphous solids, with In₂O₃ as an example. https://t.co/iFkBK57YcU
nature.com
Nature Physics - The standard band structure picture cannot be applied to amorphous materials as they lack crystal symmetry. Now a first-principles approach that captures the possibility of...
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A foundation model for atomistic materials chemistry Atomistic simulations are the “engines” behind much of modern materials science. They tell us how atoms move, how bonds break, how defects migrate. But there’s a catch: accurate ab initio methods like density functional theory
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Reinforcement learning of quantum circuit architectures for molecular potential energy curves: We aim at using #machinelearning methods for designing quantum variational principles in quantum chemistry. https://t.co/vLWexqJxAK Quantum chemistry and optimization are two of the
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Lacking translational symmetry, the momentum-space description of quasicrystals is distinct from that of fully crystalline materials. Now, a quasicrystal with two 2D layers links different momenta from the individual layers, allowing new excitons to form. https://t.co/ynyH8kIs5r
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Two regions of superconductivity are observed in the phase diagram of magic-angle twisted trilayer graphene. This may yield insight into the superconducting mechanism in moiré materials. https://t.co/WIji2rxocq
nature.com
Nature Physics - Two regions of superconductivity are observed in the phase diagram of magic-angle twisted trilayer graphene. This may yield insight into the superconducting mechanism in moiré...
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Advancing the performance of integrated circuits for next-generation electronic devices cannot be achieved solely through downscaling of transistors but requires the development of new interconnect materials, argue the authors of a new #SciencePerspective. https://t.co/zEoSQJIpTb
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Recently published in @Nature, Decoded Quantum Interferometry (DQI), a new quantum algorithm achieving exponential speedup on select optimization problems. Learn more → https://t.co/U7VPMI1TKS
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.@IBM reveals latest quantum processors—IBM Quantum Loon and IBM Quantum Nighthawk—and all future chips on our quantum development roadmap are being fabricated at the Albany NanoTech Complex (@CNSE) using 300mm semiconductor wafer technology: https://t.co/45p1ZwcMib
#QDC25
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#A new method enables detection of the elusive Unruh effect by converting its faint quantum signal into a distinct, early flash of light using superradiant atoms between high-quality mirrors. @physrevlett
https://t.co/QGuYrYBred
phys.org
Researchers from Stockholm University and the Indian Institute of Science Education and Research (IISER) Mohali have reported a practical way to spot one of physics' strangest predictions: the Unruh...
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Orbital effects of the magnetic field trigger metal-insulator transitions in correlated systems https://t.co/ExCNYDp8tb
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Gyromorphs are a new class of functional correlated disordered materials with high rotational order that exhibit deeper isotropic bandgaps https://t.co/UNvRluP9mm
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In @Nature, a Princeton team of researchers reported that their new qubit design lasts 3x longer than the best ever reported in a lab setting, bringing quantum computing “out of the realm of merely possible and into the realm of practical.” https://t.co/eD5N8iZb3l
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PsiQuantum’s founding thesis is that utility-scale quantum computers can be built like conventional supercomputers — leveraging the same mature fabs and semiconductor supply chains that are now scaling AI infrastructure at breakneck speed.
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Today, we launched Helios, a technological marvel redefining the possible. Helios is the most accurate quantum computer in the world, with 98 of the highest fidelity physical qubits ever released, and 48 error-corrected logical qubits. Learn more: https://t.co/pkvTsS9poF
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A research team at TU Wien has uncovered something astonishing: quantum entanglement the mysterious bond connecting particles across space doesn’t form instantly. Instead, it takes about 232 attoseconds (a quintillionth of a second) to fully emerge. Using advanced computer
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##Electrons in Kagome crystals exhibit geometry-driven #QuantumCoherence, forming collective states that depend on the crystal’s shape—suggesting new ways to control quantum behavior through material design. @nature
https://t.co/aGLciG9xaO
phys.org
Physicists at the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg have discovered a striking new form of quantum behavior. In star-shaped Kagome crystals—named after...
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A team led by @MIT_NSE Professor Mingda Li developed a technique that lets popular generative materials models create promising quantum materials by following specific design rules. https://t.co/HyrwiFC92N
news.mit.edu
A new tool called SCIGEN allows researchers to implement design rules that AI models must follow when generating new materials. The advance could speed the development of materials that enable...
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$IONQ Steve Brierly, chief executive of Riverlane, believes that the first error-corrected quantum computer, with around 10 000 physical qubits supporting 100 logical qubits and capable of a million QuOps (a megaQuOp), could come as soon as 2027.
physicsworld.com
Philip Ball dives into the challenges in developing quantum computing, and building up investments and users for the tech
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#Quantum computers face fundamental limits: identifying phases of #Matter in unknown quantum states can require computation times that grow exponentially, making some problems effectively unsolvable. @arxiv
https://t.co/E6a19t5lkK
phys.org
It's a well-known fact that quantum calculations are difficult, but one would think that quantum computers would facilitate the process. In most cases, this is true.
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