tldrdailynews.com logo
Tag

Superposition

All articles tagged with #superposition

Photon Truncation Won’t Create Infinite Light, Scientists Say
science1 month ago

Photon Truncation Won’t Create Infinite Light, Scientists Say

UiO physicists explore what happens when you “cut” a photon by removing a reflecting mirror. The resulting state is a complex quantum superposition where the photon number can, in theory, range from zero to infinitely many, but in practice the expected count is finite and depends on how quickly the mirror is removed—the faster the removal, the more photons can appear, yet infinite photons would require an impossibly instantaneous action. The work also highlights that vacuum energy can transform into real photons near the boundary, illustrating the strange, wave‑particle nature of light in quantum regimes.

via ScienceAlert|
#optics#photons#quantum
Quantum Basics: From Spooky Action to a New Computing Era
science1 month ago

Quantum Basics: From Spooky Action to a New Computing Era

A plain‑language primer on quantum ideas: at tiny scales particles can be in superpositions and only take a definite state when measured, while entangled particles remain linked across distances. These quirks enable qubits that can encode many possibilities in parallel, potentially solving problems in drug design, materials science and cryptography far faster than classical computers. Real-world quantum tech is still fragile and not a substitute for everyday tasks; nonetheless, progress raises both exciting capabilities and security/ethical questions as encryption faces new risks and quantum‑safe networks develop.

via The Conversation|
#cryptography#entanglement#quantum-computing
When Schrödinger Met the Box: Reassessing Quantum Reality
science3 months ago

When Schrödinger Met the Box: Reassessing Quantum Reality

The piece revisits Schrödinger’s 1935 cat-in-a-box thought experiment, used to critique interpretations of quantum mechanics by suggesting a system could be in a live-and-dead superposition until observed. It notes Schrödinger’s letter to Einstein and the ongoing debate over whether reality collapses to a definite state at measurement, highlighting the origin and stakes of the quantum measurement problem.

via Nautilus | Science|
#measurement#quantum-mechanics#schrodinger
Macroscopic quantum state realized with 7,000-atom sodium nanoparticles
physics-and-mathematics6 months ago

Macroscopic quantum state realized with 7,000-atom sodium nanoparticles

Physicists demonstrated a macroscopic quantum superposition by sending a beam of 7,000-atom sodium nanoparticles through a narrow slit, which produced an interference pattern and set a new record for the size of objects observed in quantum states; the result points toward future experiments with larger, even biological, molecules in quantum superpositions.

via Live Science|
#interference#macroscopic-quantum-state#nanoparticles
Scientists Achieve Breakthrough with 6,000-Qubit Quantum System at Room Temperature
technology10 months ago

Scientists Achieve Breakthrough with 6,000-Qubit Quantum System at Room Temperature

Scientists at Caltech have set a new record by synchronizing 6,100 neutral atom qubits in a quantum array that operates at room temperature, with extended superposition coherence of 12.6 seconds, marking a significant step toward scalable, fault-tolerant quantum computers capable of surpassing classical supercomputers.

via Yahoo! Tech|
#error-correction#neutral-atoms#quantum-computing
Quantum Cat Sets New Record with 23-Minute Superposition
science1 year ago

Quantum Cat Sets New Record with 23-Minute Superposition

A team of scientists led by Zheng-Tian Lu has achieved a groundbreaking feat by maintaining a quantum superposition, or "cat state," for 23 minutes, a significant leap from the usual fleeting existence of such states. Using ytterbium atoms cooled to near absolute zero and precisely tuned lasers, the researchers managed to stabilize these states, which are highly sensitive to environmental changes. This advancement could revolutionize quantum information processing and enhance the sensitivity of probes for detecting subtle magnetic forces, pushing the boundaries of quantum technology.

via Earth.com|
#quantum-computing#quantum-mechanics#quantum-stability
Uncertainty in Quantum Perspectives
science1 year ago

Uncertainty in Quantum Perspectives

Quantum physicists are exploring the concept of quantum reference frames, where observers' frames of reference can exist in multiple locations simultaneously, affecting phenomena like superposition and entanglement. This approach could help resolve paradoxes in quantum thought experiments and provide insights into quantum gravity, potentially bridging the gap between quantum mechanics and general relativity. However, challenges remain in defining and translating between quantum reference frames.

via Quanta Magazine|
#entanglement#quantum-gravity#quantum-physics
Exploring Gravity as a Quantum Field Theory
science1 year ago

Exploring Gravity as a Quantum Field Theory

Scientists have proposed a new test to explore the quantum nature of gravity, which remains the only major force not fitting into the quantum framework. The test involves placing a tiny crystal in a state of superposition and observing its interaction with another crystal to detect quantum effects. If successful, this experiment could provide evidence that gravity has a quantum nature, marking a significant step towards a unified theory of physics.

via Yahoo! Voices|
#general-relativity#physics#quantum-gravity
"Quantum Computing in 2023: Tackling Noise for Exponential Growth"
technology2 years ago

"Quantum Computing in 2023: Tackling Noise for Exponential Growth"

The Starts With A Bang podcast episode 101 features Dr. Riccardo Manenti, an expert in quantum computing, who discusses the realities and misconceptions of quantum computers. Quantum computers differ from classical ones by allowing bits to exist in superposition states, not just as 0s or 1s. The episode aims to cut through the hype surrounding quantum computing, such as the notions of "quantum supremacy" and "quantum advantage," and provide a clearer understanding of the technology's actual progress and challenges. Manenti, with his extensive background, including a PhD from Oxford and experience at Rigetti, offers insights into the current state and future potential of quantum computing.

via Big Think|
##quantumadvantage#quantumcomputing
Unveiling the Hidden Quantum Realm: The Overlooked Experiment
physics2 years ago

Unveiling the Hidden Quantum Realm: The Overlooked Experiment

The Stern-Gerlach experiment, conducted in 1922, confirmed the existence of quantum phenomena and played a crucial role in the development of quantum theory. The experiment involved shooting silver atoms at a detector and observing the splitting of the silver deposit. While the scientists initially attributed the splitting to the orbit of the atom's outermost electron, it was later discovered that it was actually due to the quantization of the electron's internal angular momentum, known as spin. This unexpected result led to a deeper understanding of quantum mechanics and challenged previous interpretations of the experiment.

via Quanta Magazine|
#electron-spin#physics#quantum-mechanics
"Scientists Challenge Reality: Quantum Breakthrough Sparks Paradigm Shift"
science2 years ago

"Scientists Challenge Reality: Quantum Breakthrough Sparks Paradigm Shift"

Quantum physicists from Hiroshima University have challenged traditional views of fixed physical properties by revealing that the results of quantum measurements are fundamentally tied to the interaction dynamics between the measuring device and the system. Their findings suggest that reality is shaped by the context of these interactions, providing evidence against the belief that our world can be reduced to a mere configuration of material building blocks. The study highlights the importance of understanding the dynamics of measurement interactions in interpreting quantum experimental data and calls for a revision of our understanding of the meaning of experimental data in quantum mechanics.

via SciTechDaily|
#measurement#quantum-mechanics#quantum-physics