Quantum entanglement in molecular polariton dynamics: a new framework

Recent advances in quantum materials research have extended the Středa formula to non-equilibrium, periodically driven systems, revealing a universal, quantized magnetic response rooted in topology. By applying Cesàro summation, researchers demonstrated that what appears as a trivial sum of zeros actually encodes robust bulk magnetization and edge phenomena unique to Floquet systems. This approach resolves longstanding theoretical challenges and suggests new experimental strategies, such as particle-density measurements, to detect these effects even in disordered materials. The findings offer a framework for classifying nonequilibrium phases and investigating energy exchange in driven quantum systems.

𝐐𝐮𝐚𝐧𝐭𝐮𝐦 𝐦𝐞𝐜𝐡𝐚𝐧𝐢𝐜𝐚𝐥 𝐰𝐚𝐯𝐞-𝐥𝐢𝐤𝐞 𝐞𝐟𝐟𝐞𝐜𝐭𝐬 𝐟𝐨𝐮𝐧𝐝 𝐢𝐧 𝐛𝐚𝐜𝐭𝐞𝐫𝐢𝐚𝐥 "𝐧𝐚𝐧𝐨𝐰𝐢𝐫𝐞𝐬," 𝐰𝐡𝐢𝐜𝐡 𝐜𝐞𝐫𝐭𝐚𝐢𝐧 𝐛𝐚𝐜𝐭𝐞𝐫𝐢𝐚 𝐮𝐬𝐞 𝐭𝐨 𝐞𝐦𝐢𝐭 𝐞𝐱𝐜𝐞𝐬𝐬 𝐞𝐥𝐞𝐜𝐭𝐫𝐨𝐧𝐬.  These effects occurred at room temperature. The excess electrons result from the conversion of organic waste into energy. The publication was the cover story for the journal of the 𝘈𝘮𝘦𝘳𝘪𝘤𝘢𝘯 𝘊𝘩𝘦𝘮𝘪𝘤𝘢𝘭 𝘚𝘰𝘤𝘪𝘦𝘵𝘺. https://lnkd.in/eKnDcPFD “With the exception of processes like photosynthesis, where sunlight moves very rapidly but over a very short distance, the common wisdom is that the biological world is a very noisy and hostile environment that effectively destroys any quantum effect,” said Malvankar. Generally, we don’t think of quantum mechanics in biology, so this is a big surprise. There’s a lot of interest in quantum computers because they can store and process huge amounts of data. But this requires electrons to communicate with each other, and currently this can only happen at temperatures down to minus 500 degrees Fahrenheit, which is expensive. But nature often has very simple solutions to complex problems. In these bacteria, we are measuring quantum effects at room temperature. If we can learn lessons from nature itself, merging what we know about quantum mechanics and biology, we can start to apply the same principles to make the next leap for quantum computers.” https://lnkd.in/eZxJ9HHp

One of the big challenges for quantum chemistry is accurately describing molecules where electrons are strongly interacting while keeping the calculations affordable on today’s small, noisy #quantum computers. A method called LASSCF breaks a molecule into fragments, treating each piece carefully while handling the interactions between pieces in a simpler way, making it less costly than traditional approaches.   🔗 https://lnkd.in/gwQEKZ3S   In a new paper, scientists combine LASSCF with a modified version of the variational quantum eigensolver (VQE), called nuVQE, which adds special qubit operators. These operators capture electron correlations without making the quantum circuits deeper, which is important for current hardware. The combined method — LAS-nuVQE — achieves chemical accuracy for test molecules using fewer than 70 quantum gates, outperforming standard approaches.   The approach shows that accurate quantum chemistry simulations of complex systems are possible on today’s limited quantum devices by carefully combining classical approximations with efficient quantum algorithms.   Learn more: https://lnkd.in/gwQEKZ3S   The paper is authored by Qiaohong(Joanna) Wang, Ruhee D'cunha, Abhishek Mitra, Stephen Gray, Matt Otten and Laura Gagliardi, who conducted the work at the Pritzker School of Molecular Engineering at the University of Chicago, the University of Chicago Department of Chemistry, the Center for Nanoscale Materials at Argonne National Laboratory and the University of Wisconsin–Madison Department of Physics.   #QuantumComputing #QuantumScience  

Great news from the lab of USC Dornsife College of Letters, Arts and Sciences Chemistry Professor Stephen Bradforth -- a major grant from the new US-UK #Quantum Initiative. Bradforth's team is developing powerful new tools to detect quantum entanglement in real time, capturing events that unfold in just quadrillionths of a second. The project also aims to train a new generation of scientists in #quantum #information #science, helping build a #workforce ready for the emerging quantum era.

Electrons that act like photons reveal a quantum secret: Quantum materials, defined by their photon-like electrons, are opening new frontiers in material science. Researchers have synthesized organic compounds that display a universal magnetic behavior tied to a distinctive feature in their band structures called linear band dispersion. This discovery not only deepens the theoretical understanding of quantum systems but also points toward revolutionary applications in next-generation information and communication technologies that conventional materials cannot achieve. #ScienceDaily #Technology

🚀Blog Altert: Graphene just broke another physics barrier! A new study in Nature Physics reveals that in ultraclean graphene, electrons don’t move like individual particles — they flow like a fluid. 🌊⚡ Key highlights: 🔹 Electrons in graphene behave like a perfect quantum fluid, similar to the exotic matter in the early universe. 🔹 The well-known Wiedemann–Franz law — which links heat and electrical flow — is violated by over 200 times. 🔹 Researchers discovered a universal conductivity value, tied to nature’s fundamental constants. Why it matters: 👉 Potential for super-efficient electronics with minimal energy loss. 👉 Opens doors to new cooling and thermoelectric technologies. 👉 Connects tabletop materials science with cosmic physics and black hole theories. Graphene continues to prove it’s not just a “wonder material” — it’s a window into quantum reality. Just look at my latest blog. 🔗 https://lnkd.in/evKZDDKE #Graphene #Thinkoutofthebox #discovery #innovation #quantum #Physics SR University School of Sciences and Humanities SR University SRU SOE SRU-School of Agriculture CS&AI -SRU Civil Engineering SRU SRU-Mechanical Engineering ECE SR University EEE SR University

𝗖𝗮𝗻 𝘁𝗵𝗲 𝗲𝘅𝗽𝗲𝗿𝗶𝗺𝗲𝗻𝘁𝘀 𝘄𝗲 𝗯𝗲𝗻𝗰𝗵𝗺𝗮𝗿𝗸 𝗼𝘂𝗿 𝗾𝘂𝗮𝗻𝘁𝘂𝗺 𝗮𝗹𝗴𝗼𝗿𝗶𝘁𝗵𝗺𝘀 𝗳𝗼𝗿 𝗰𝗵𝗲𝗺𝗶𝘀𝘁𝗿𝘆 𝗮𝗿𝗲 𝘄𝗿𝗼𝗻𝗴? As a chemist I have been taught that they can’t: experiment is the measure of all things. As a theoretician I know they can (even in #spectroscopy), and I praise each such case. Here is my favorite one. But beware: experiments can be repeated by theory-aware scientists such as 𝗚𝗲𝗿𝗵𝗮𝗿𝗱 𝗛𝗲𝗿𝘇𝗯𝗲𝗿𝗴. Here is a humbly looking abstract of his seminal paper “Dissociation Energy and Ionization Potential of Molecular Hydrogen” published in 1969: "𝘛𝘩𝘦 𝘴𝘮𝘢𝘭𝘭 𝘥𝘪𝘴𝘤𝘳𝘦𝘱𝘢𝘯𝘤𝘺 𝘣𝘦𝘵𝘸𝘦𝘦𝘯 𝘦𝘹𝘱𝘦𝘳𝘪𝘮𝘦𝘯𝘵𝘢𝘭 𝘢𝘯𝘥 𝘵𝘩𝘦𝘰𝘳𝘦𝘵𝘪𝘤𝘢𝘭 𝘷𝘢𝘭𝘶𝘦𝘴 𝘧𝘰𝘳 𝘵𝘩𝘦 𝘥𝘪𝘴𝘴𝘰𝘤𝘪𝘢𝘵𝘪𝘰𝘯 𝘦𝘯𝘦𝘳𝘨𝘪𝘦𝘴 𝘰𝘧 𝘏2, 𝘏𝘋, 𝘢𝘯𝘥 𝘋2 𝘩𝘢𝘴 𝘣𝘦𝘦𝘯 𝘳𝘦𝘴𝘰𝘭𝘷𝘦𝘥 𝘣𝘺 𝘯𝘦𝘸 𝘮𝘦𝘢𝘴𝘶𝘳𝘦𝘮𝘦𝘯𝘵𝘴 𝘰𝘧 𝘵𝘩𝘦 𝘶𝘭𝘵𝘳𝘢𝘷𝘪𝘰𝘭𝘦𝘵 𝘢𝘣𝘴𝘰𝘳𝘱𝘵𝘪𝘰𝘯 𝘭𝘪𝘮𝘪𝘵𝘴 𝘰𝘧 𝘵𝘩𝘦𝘴𝘦 𝘮𝘰𝘭𝘦𝘤𝘶𝘭𝘦𝘴. 𝘐𝘯 𝘢𝘥𝘥𝘪𝘵𝘪𝘰𝘯, 𝘵𝘩𝘦 𝘪𝘰𝘯𝘪𝘻𝘢𝘵𝘪𝘰𝘯 𝘱𝘰𝘵𝘦𝘯𝘵𝘪𝘢𝘭 𝘰𝘧 𝘏2 𝘩𝘢𝘴 𝘣𝘦𝘦𝘯 𝘮𝘰𝘳𝘦 𝘢𝘤𝘤𝘶𝘳𝘢𝘵𝘦𝘭𝘺 𝘥𝘦𝘵𝘦𝘳𝘮𝘪𝘯𝘦𝘥 𝘧𝘳𝘰𝘮 𝘙𝘺𝘥𝘣𝘦𝘳𝘨 𝘴𝘦𝘳𝘪𝘦𝘴. 𝘛𝘩𝘦 𝘢𝘨𝘳𝘦𝘦𝘮𝘦𝘯𝘵 𝘣𝘦𝘵𝘸𝘦𝘦𝘯 𝘵𝘩𝘦𝘰𝘳𝘺 𝘢𝘯𝘥 𝘦𝘹𝘱𝘦𝘳𝘪𝘮𝘦𝘯𝘵 𝘮𝘶𝘴𝘵 𝘣𝘦 𝘤𝘰𝘯𝘴𝘪𝘥𝘦𝘳𝘦𝘥 𝘷𝘦𝘳𝘺 𝘴𝘢𝘵𝘪𝘴𝘧𝘢𝘤𝘵𝘰𝘳𝘺." Nothing like now that every paper is sold as "groundbreaking". Yet this was a groundbreaking work! From the dawn of quantum mechanics in 1920s to 1969 no one was able to achieve “very satisfactory” agreement between measurements and theory. By the time two Nobel Prizes had already been awarded for quantum chemistry, but hydrogen, H2, the simplest molecule still remained a riddle! The issue was so severe that many seriously doubted the very adequacy of quantum mechanics to describe molecular systems. Fortunately, Herzberg repeated the measurements and by reassigning the lines put the things at place, or better, put the bands at place, showing the agreement with theory and “saving” quantum mechanics’ future in molecular science. Previous experiments and interpretations were “wrong”, not the theory. Two years later he was awarded a Nobel Prize for chemistry. 𝗟𝗼𝗻𝗴 𝘀𝘁𝗼𝗿𝘆 𝘀𝗵𝗼𝗿𝘁: 𝗲𝘃𝗲𝗻 𝗺𝗼𝗹𝗲𝗰𝘂𝗹𝗮𝗿 #𝘀𝗽𝗲𝗰𝘁𝗿𝗼𝘀𝗰𝗼𝗽𝘆 𝗺𝗲𝗮𝘀𝘂𝗿𝗲𝗺𝗲𝗻𝘁𝘀 𝗰𝗮𝗻 𝗯𝗲 𝘄𝗿𝗼𝗻𝗴 𝗯𝘂𝘁 𝘄𝗶𝘁𝗵 𝗮 𝗹𝗶𝘁𝘁𝗹𝗲 𝗵𝗲𝗹𝗽 𝗳𝗿𝗼𝗺 𝘁𝗵𝗲𝗼𝗿𝗲𝘁𝗶𝗰𝗶𝗮𝗻-𝗳𝗿𝗶𝗲𝗻𝗱𝘀 𝘁𝗵𝗲𝘆 𝘀𝗵𝗶𝗻𝗲 𝗮𝗻𝗱 𝗺𝗮𝗸𝗲 𝘁𝗵𝗲𝗼𝗿𝘆 𝘀𝗵𝗶𝗻𝗲, 𝘁𝗼𝗼. This post is inspired by the discussion between Guglielmo Mazzola and Michael Marthaler.

My independent research has been published in Journal of Computational Electronics. Link: https://lnkd.in/gAXWzmbn Full-text (view only): https://rdcu.be/eGzbZ Expressing quantum mechanics in phase space through the Wigner–Moyal equation yields a remarkably intuitive form: the classical Boltzmann transport equation with an infinite series of nonlinear quantum corrections. This attractive formulation has long been known (1949~) and widely used, particularly for deriving quantum correction models in nanoscale devices. Yet, ironically, directly solving the Wigner–Moyal equation for arbitrary potentials has also been regarded as numerically unstable and essentially unusable. I showed that the long-standing instability of the Wigner–Moyal equation arises from unbounded quantum nonlocality at microscopic scales, and that this can be bounded by the uncertainty limit through a numerical observer effect—proposing, for the first time, a stable method to solve it for arbitrary potential profiles. This opens a new path for stable quantum transport simulations bridging classical and quantum dynamics, while the ability of the observer effect to tune nonlocality points to phenomena beyond intrinsic quantum mechanics.

UBC researchers outline the theory and the mathematics behind the "matter-out-of-nowhere" theory: "It’s exciting to understand how and why the mass varies, and how this affects our understanding of quantum tunnelling processes, which are ubiquitous in physics, chemistry and biology."

Exploring the Physics and Chemistry of Rare Earths Handbook 1) Rare earth elements (REEs) are crucial for modern technology, playing a key role in devices like smartphones and wind turbines. 2) There are 17 rare earth elements, including 15 lanthanides, scandium, and yttrium, known for their unique magnetic and optical properties. 3) Yttrium, discovered in 1787, was the first rare earth element, and these elements gained practical importance in the mid-20th century. 4) Neodymium magnets, vital for electric vehicles and wind turbines, exemplify the strong magnetic properties of rare earth elements. 5) Europium and terbium's optical properties enable them to emit specific light wavelengths, crucial for LED displays and lighting. 6) Gadolinium's paramagnetic properties make it a valuable contrast agent in MRI procedures, highlighting the medical applications of REEs. 7) REEs primarily exist in a +3 oxidation state but can form other states, such as cerium, which is key in catalytic converters. 8) The separation and purification of REEs are challenging due to similar chemical properties, driving innovation in extraction methods. 9) REEs form complex compounds used in industrial processes, such as petroleum refining, underscoring their diverse applications. 10) Understanding the chemistry and physics of REEs provides a competitive advantage in the natural resources sector. https://lnkd.in/ePveAHYc