The wave-particle duality of quantum objects like photons, electrons and atoms through double-slit experiments. Now it’s time’s turn.
Category: quantum physics – Page 399
An international team, headed by the University of Geneva (UNIGE), has created a quantum material that allows the fabric of the space inhabited by electrons to be curved on demand.
The advent of cutting-edge information and communication technologies presents scientists and industry with new hurdles to overcome. To address these challenges, designing new quantum materials, which derive their remarkable characteristics from the principles of quantum physics, is the most promising approach.
A global collaboration headed by the University of Geneva (UNIGE) and featuring researchers from the universities of Salerno, Utrecht, and Delft, has developed a material that allows for the control of electron dynamics by curving the fabric of space in which they evolve. This advancement holds promise for future electronic devices, particularly in the field of optoelectronics. The findings were published in the journal Nature Materials.
Imperial physicists have performed the double-slit experiment in time, using materials that can change optical properties in femtoseconds, providing insights into the nature of light and paving the way for advanced materials that can control light in both space and time.
Imperial physicists have recreated the famous double-slit experiment, which showed light behaving as particles and a wave, in time rather than space.
In a groundbreaking development, Imperial College London.
Quantum computing promises to be a revolutionary tool, making short work of equations that classical computers would struggle to ever complete. Yet the workhorse of the quantum device, known as a qubit, is a delicate object prone to collapsing.
Keeping enough qubits in their ideal state long enough for computations has so far proved a challenge.
In a new experiment, scientists were able to keep a qubit in that state for twice as long as normal. Along the way, they demonstrated the practicality of quantum error correction (QEC), a process that keeps quantum information intact for longer by introducing room for redundancy and error removal.
An analysis and improvement of the spectral properties of nitrogen-vacancy defects in diamond nanostructures paves the way for efficient entanglement generation necessary for many quantum information applications.
Magnetic spin excitations can combine with photons to produce exotic particles that emit laser-like microwaves.
One of the challenges for building systems for quantum computing and communications has been the lack of laser-like microwave sources that produce sufficient power but don’t require extreme cooling. Now a research team has demonstrated a new room-temperature technique for making coherent microwave radiation—the kind that comes from a laser [1]. The device exploits the interaction of a magnetic material with electromagnetic fields. The researchers expect that the work will lead to microwave sources that can be built into chips employed in future quantum devices.
The devices that store quantum bits for quantum computers often require microwave signals to input and retrieve data, so lasers operating at microwave frequencies (masers)—and other sources of coherent microwaves—could be very useful. But even though masers were invented before lasers, most maser technologies work only at ultracold temperatures. A 2018 design works at room temperature but doesn’t produce very much power [2].
Has AI advanced too far and too fast? Does it represent an out-of-control threat to humanity? Some credible observers believe AI may have reached a tipping point, and that if research on the technology continues unchecked, AI could spin out of control and become dangerous.
This article explores how Google responded to ChatGPT by using foundation models and generative AI to create innovative products and improve its existing offerings. It also examines Google’s use of Safe AI when creating new products.
“Moreover, in all of these tasks, GPT-4’s performance is strikingly close to human-level performance, and often vastly surpasses prior models such as ChatGPT. Given the breadth and depth of GPT-4’s capabilities, we believe that it could reasonably be viewed as an early (yet still incomplete) version of an artificial general intelligence (AGI) system.”
We are indeed living in “interesting” times.
Paul Smith-Goodson is the Vice President and Principal Analyst covering AI and quantum for Moor Insights & Strategy. He is currently working on several research projects, one of which is a unique method of using machine learning for highly accurate prediction of real-time and future global propagation of HF radio signals.
A quantum computational solution for engineering materials. Researchers at Argonne explore the possibility of solving the electronic structures of complex molecules using a quantum computer. If you know the atoms that compose a particular molecule or solid material, the interactions between those atoms can be determined computationally, by solving quantum mechanical equations — at least, if the molecule is small and simple. However, solving these equations, critical for fields from materials engineering to drug design, requires a prohibitively long computational time for complex molecules and materials.
Retrocausality, a mind-blowing quantum concept, proposes that future events impact the past. Challenging time’s traditional flow and exploring interconnected temporal relationships. Can the universe communicate with its past-self?
0:00 What is Retrocausality?
00:55 The Layers of the Universe.
02:17 The Universe Is Not Real.
04:32 The Role of Quantum Entanglement.
08:02 Does Time Travel Explain the Mysteries of the Universe?
#retrocausality #timetravel #quantummechanics.
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Erasing data perfectly and attaining the lowest possible temperature may appear unrelated, but they share a strong connection. Researchers at TU Wien have discovered a quantum formulation for the third law of thermodynamics.
The temperature of absolute zero.
Absolute zero is the theoretical lowest temperature on the thermodynamic temperature scale. At this temperature, all atoms of an object are at rest and the object does not emit or absorb energy. The internationally agreed-upon value for this temperature is −273.15 °C (−459.67 °F; 0.00 K).