Floquet engineering is emerging as a tool to control quantum materials. Here it is applied using non-resonant optical fields to coherently dress Hubbard excitons in Sr2CuO3, driving wavefunction rotations between bright and dark states.
Category: quantum physics
In search of a room-temperature superconductor, scientists present a research agenda
The search for materials that can conduct electricity at room temperature without losing energy is one of the greatest and most consequential challenges of modern physics: loss-free power transmission, more efficient motors and generators, more powerful quantum computers, cheaper MRI devices. Hardly any other material discovery has the potential to change so many areas of technology and everyday life at the same time.
An international research team, with the participation of Christoph Heil from the Institute of Theoretical and Computational Physics at Graz University of Technology (TU Graz) is now presenting a systematic approach to finding such materials. In a perspective article in the journal Proceedings of the National Academy of Sciences, a strategy paper that assesses the current state of research and sets out future directions, the 16 authors state that there are no fundamental physical laws that rule out superconductivity at ambient temperature.
Superconductivity controlled by a built-in light-confining cavity
For the first time, physicists have demonstrated that a material’s superconductivity can be altered by coupling it to an in-built, light-confining cavity. In experiments published in Nature, a team led by Itai Keren at Columbia University show how quantum properties can be deliberately engineered by bonding carefully chosen materials together—without applying any external light, pressure, or magnetic field.
As researchers have probed the quantum behavior of solids in ever greater detail, they have uncovered a wealth of so-called “emergent” properties, which arise from intricate interactions between electrons, quantum spins, and localized vibrations of a crystal lattice. Phenomena including superconductivity, magnetism, and charge ordering all emerge from these kinds of collective effects—all richer and more complex than the sum of their microscopic parts.
Building on this principle, physicists are increasingly exploring whether materials could be designed with specific emergent behaviors built directly into their structures. Rather than tuning a compound after it is made, the goal here is to engineer its quantum environment from the outset.
Quantum entanglement offers route to higher-resolution optical astronomy
Researchers in the US have demonstrated how quantum entanglement could be used to detect optical signals from astronomical sources at the single-photon level. Published in Nature, a team led by Pieter-Jan Stas at Harvard University showed how extremely weak light signals could be detected across a fiber link spanning more than 1.5 km—possibly paving the way for optical telescopes with unprecedented resolution.
Interferometry is often used in astronomy to produce high-resolution images of distant objects. By combining light collected across networks of spatially separated detectors, the technique can achieve resolutions comparable to those of a single telescope with a diameter equivalent to the distance between them. In continent-spanning networks like the Event Horizon Telescope, it was used to create the first direct image of a black hole (Messier 87) in 2019.
2D topological Kondo insulator observed in a moiré superlattice
When mobile charge carriers, also known as itinerant electrons, interact with the strong exchange magnetic fields associated with the intrinsic angular momentum of localized electrons, this can give rise to the so-called Kondo effect. A Kondo insulator is a state of matter with an energy gap opened by the Kondo effect that forbids electrical conduction at low temperatures.
Like Kondo insulators, topological Kondo insulators are materials that behave as insulators (i.e., not conducting electricity) in their interior, but, unlike their counterparts without topology, can conduct electricity at their surface or edges. This unique, quantum phase of matter is protected by a material’s internal symmetry and topology; thus, it is not easily disrupted.
So far, hints of this phase have been primarily observed in 3D quantum materials, such as samarium hexaboride (SmB₆) and ytterbium dodecaboride. Some physicists and material scientists have also been exploring the possible existence of this phase in 2D structures comprised of two materials stacked with a slight mismatch between them, producing a pattern known as a moiré superlattice.
Ultrafast light pulses make molecules rotate on quantum materials
Researchers from Germany, Japan and India, led by scientists from DESY and the Universities of Kiel and Hamburg, have found a way to collectively make molecules on a flat surface rotate by exposing them to light using ultrafast light pulses from DESY’s free-electron laser FLASH and a high-harmonic generation source. However, making those molecules dance is not the ultimate goal: this result could have an impact on next-generation quantum and energy materials for electronics, data storage and energy conversion.
Molecules sitting on a material surface usually do just that—they sit on the surface without changing. If you send energy their way, however—for example, in the form of light—they can become dynamic and move. If this movement could be controlled, it could have a massive influence on all sorts of nanomaterials that are being investigated for a variety of applications from health to data storage.
DESY scientist Markus Scholz, leader of a study now published in Nature Communications, points out that this is particularly interesting in hybrid systems where organic molecules are placed on atomically thin, two-dimensional quantum materials. Examples of these hybrid systems are molecular electronics or energy-driven functional surfaces.
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Special thanks to our beloved YouTube members this month: Powlin Manuel, Saïd Kadi, Chenxi, Lord, Sudhir Paranjape, Nate Lachae, Alison Rewell, Thomas Lapins, Ahmad Salahudin, Antonio Ferriol Colombram, Anton Nicolas Burger 🚀🚀🚀
Experts featured in this video include Demis Hassabis, Tristan Harris, Aza Raskin, Elon Musk, David Deutsch, Michio Kaku, Brian Greene and Nick Bostrom.
Chapter:
0:00 A dangerous truth?
1:29 AI advancement.
3:46 AI pretending not to know.
7:29 Interactive tutoring.
9:37 That’s it from our sponsor!
10:21 The merging of QC and AI
12:03 IBM 100,000 qubits.
14:34 AI wipes out humanity?
16:05 Google Willow.
17:06 The misuse of AI and QC
18:22 Singularity and Turing test.
22:51 Reverse Turing test.
29:39 Quantum-AI consequences.
32:25 The double slit experiment.
36:15 Quantum multiverse.
41:05 Computing history.
46:49 AGI timeline.
51:45 Philosophical consequence.
#AI #quantumcomputing #singularity
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What Happens When Quantum-AI Knows TOO MUCH?
Let’s unravel what happens when AI merges with quantum, and starts knowing EVERYTHING ♾️ Go to https://piavpn.com/beeyondideas to get 83% off from our sponsor Private Internet Access with 4 months free!
Want to support our production? Feel free to join our membership at https://youtu.be/_Z4W6sWDo_4?si=Q8eRZoNFUv7sAd9y Special thanks to our beloved YouTube members this month: Powlin Manuel, Saïd Kadi, Chenxi, Lord, Sudhir Paranjape, Nate Lachae, Alison Rewell, Thomas Lapins, Ahmad Salahudin, Antonio Ferriol Colombram, Anton Nicolas Burger 🚀🚀🚀 Experts featured in this video include Demis Hassabis, Tristan Harris, Aza Raskin, Elon Musk, David Deutsch, Michio Kaku, Brian Greene and Nick Bostrom. Chapter: 0:00 A dangerous truth? 1:29 AI advancement 3:46 AI pretending not to know 7:29 Interactive tutoring 9:37 That’s it from our sponsor! 10:21 The merging of QC and AI 12:03 IBM 100,000 qubits 14:34 AI wipes out humanity? 16:05 Google Willow 17:06 The misuse of AI and QC 18:22 Singularity and Turing test 22:51 Reverse Turing test 29:39 Quantum-AI consequences 32:25 The double slit experiment 36:15 Quantum multiverse 41:05 Computing history 46:49 AGI timeline 51:45 Philosophical consequence #AI #quantumcomputing #singularity.
Special thanks to our beloved YouTube members this month: Powlin Manuel, Saïd Kadi, Chenxi, Lord, Sudhir Paranjape, Nate Lachae, Alison Rewell, Thomas Lapins, Ahmad Salahudin, Antonio Ferriol Colombram, Anton Nicolas Burger 🚀🚀🚀
Experts featured in this video include Demis Hassabis, Tristan Harris, Aza Raskin, Elon Musk, David Deutsch, Michio Kaku, Brian Greene and Nick Bostrom.
Chapter:
0:00 A dangerous truth?
1:29 AI advancement.
3:46 AI pretending not to know.
7:29 Interactive tutoring.
9:37 That’s it from our sponsor!
10:21 The merging of QC and AI
12:03 IBM 100,000 qubits.
14:34 AI wipes out humanity?
16:05 Google Willow.
17:06 The misuse of AI and QC
18:22 Singularity and Turing test.
22:51 Reverse Turing test.
29:39 Quantum-AI consequences.
32:25 The double slit experiment.
36:15 Quantum multiverse.
41:05 Computing history.
46:49 AGI timeline.
51:45 Philosophical consequence.
#AI #quantumcomputing #singularity
