Tag

Quantum

All articles tagged with #quantum

science1 month ago•8 min saved

Gravity in the quantum realm: atom interferometry tests Einstein's equivalence principle

An international team used the Quantum Galileo Interferometer to split ultracold rubidium atoms, letting one part fall while the other stayed stationary, then recombined them to detect a minute gravity-induced quantum phase. The measured phase agrees with Einstein's equivalence principle extended to quantum objects, providing a direct laboratory link between gravity and quantum mechanics—without claiming a full quantum theory of gravity—and pointing toward future tests with heavier objects.

via ScienceDaily|

#atom-interferometry #equivalence-principle #gravity

business1 month ago•18 min saved

IonQ’s Space Push Signals Monetization Beyond Quantum

IonQ is expanding beyond its quantum-computing roots as its Skyloom unit deployed dozens of optical communications terminals on defense satellites for the SDA’s Proliferated Warfighter Space Architecture, signaling a move from development to recurring space revenue with 84 terminals now in orbit. In Q2, IonQ revenue rose to $80.1 million (up 287% YoY) and full-year guidance was raised to $280–$290 million, but adjusted EBITDA loss widened to $120.3 million, highlighting the cost of scaling. Investors trimmed the stock after the company did not disclose contract values, while an upcoming Sept. 8 Investor Day is expected to detail Skyloom’s monetization path and IonQ’s broader strategy to monetize its expanded portfolio in quantum networking, sensing, security, semiconductors and space-based communications.

via Yahoo Finance|

#business #ionq #quantum

science1 month ago•10 min saved

Wireless quantum link over 13 miles: New York test goes open-air

US researchers demonstrated a 13-mile open-air quantum link in New York, sending photon-based quantum states through the atmosphere from Stony Brook to Brookhaven using free-space optics and adaptive optics to preserve entanglement; the test adds a wireless dimension to quantum networks and could support satellite links without relying on fiber.

via Interesting Engineering|

#entangled-photons #free-space-optics #open-air

science2 months ago•8 min saved

Quantum test confirms negative time is a real, measurable effect

Photons passing through a rubidium atomic cloud can appear to spend a negative amount of time inside the cloud when inferred from their arrival times. By performing ultra-weak measurements of the atoms, researchers found the dwell time measured in the atoms matches this negative value, showing negative time is a real, measurable quantum effect that fits standard physics and is not just an artifact.

via ScienceDaily|

#atomic-physics #photons #quantum

science2 months ago•5 min saved

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

physics-and-chemistry2 months ago•17 min saved

The Quantum Split: A Theorized Truncated Photon Reveals an Infinite Photon State

A University of Oslo team theorizes that by using a fast optical shutter to create a left/right superposition, a photon can be effectively “cut” into a highly nonclassical state that, in principle, contains photons with numbers extending to infinity. The result isn’t two photons or a photon plus vacuum; instead, removing the shutter pulls photons from the vacuum, forming a sharp edge with a transition region. Local measurements on either side would resemble a single-photon state and vacuum respectively, even though the underlying state is much more complex. The study is purely theoretical but highlights surprising aspects of quantum field theory and wave–particle duality, and could in principle be tested experimentally.

via Gizmodo|

#photon #physics-and-chemistry #quantum

science3 months ago•53 min saved

Entropy-Clock: Time Emerges from a Lab-Ccreated Mini‑Universe

A University of Birmingham team used a Bose‑Einstein condensate split into two halves to emulate a universe with no external clock. By letting entropy flow between the halves, they defined an internal clock—entropic time—that ordered events in the bright sector and could run faster, slower, or stop altogether as entropy exchange varied. The researchers also derived a Schrödinger equation using this internal time, supporting the idea that time and its arrow may emerge from internal relations and observer ignorance rather than an external time parameter.

via Yahoo|

#bose-einstein-condensate #entropy #quantum

science3 months ago•14 min saved

Penrose's Quantum Conundrum: Is Consciousness Beyond Brain Computation?

Physicist Roger Penrose argues consciousness cannot be explained by ordinary neural computation and may require physics not yet discovered, via the Orch-OR theory with Hameroff which posits gravity-linked quantum collapse inside microtubules; while testable, it remains controversial with mixed experimental support and is not universally accepted as the mechanism behind mind.

via Space Daily|

#consciousness #microtubules #orch-or

science3 months ago•6 min saved

Quantum Time Reversal Realized: Measuring to Reverse Time's Arrow and Harvest Energy

Researchers have developed quantum-control protocols that, by integrating quantum measurements with feedback, can suppress or reverse the arrow of time in quantum systems. By designing a control Hamiltonian that mirrors measurement effects, they create time-reversed or distorted trajectories and even a measurement-based engine that extracts energy from the act of observation. The work—published in Physical Review X—aims to improve quantum state control and could enable new methods for powering quantum computers and batteries, with planned experimental tests using superconducting qubits.

via ScienceDaily|

#maxwells-demon #measurement #quantum

technology3 months ago•3 min saved

NIST-SRI Launch Center to Accelerate Quantum Manufacturing

NIST and SRI International are creating the Quantum Manufacturing Engineering Center (QMEC) with an initial $20 million to accelerate the scalable manufacture of high‑performance quantum components and systems, address manufacturing barriers, and strengthen the U.S. quantum industry through public‑private collaboration and connections to the Quantum Economic Development Consortium (QED-C).

via National Institute of Standards and Technology (.gov)|

#manufacturing #nist #qed-c

technology3 months ago•3 min saved

NSF backs five teams to design next-gen quantum tech through National Quantum Virtual Laboratory

The National Science Foundation is funding five new teams—joining four from 2025—with $20 million to design experimental quantum technologies via the National Quantum Virtual Laboratory. Each team will receive $4 million over two years to develop integrated systems in sensors, networks and computing and to prepare for implementation in 2026. The effort includes partnerships with federal labs, industry and educators, and aims to translate quantum research into real-world applications while expanding the quantum workforce.

via National Science Foundation (.gov)|

#networks #nsf #quantum

science3 months ago•7 min saved

Quantum Control Reverses the Arrow of Time in the Lab

Researchers developed measurement-based quantum control that, by combining measurements, feedback, and tailored control fields, can stretch or reverse the apparent arrow of time in quantum systems, creating time-reversed trajectories and a measurement-powered engine that can extract energy from monitoring; the work, published in Physical Review X, points to new methods for quantum state preparation and energy management with platforms like superconducting qubits.

via SciTechDaily|

#measurement #quantum #quantum-control

technology3 months ago•12 min saved

White House Unveils Unified Quantum Initiative to Cement U.S. Tech Leadership

The White House issued Executive Order 14411 to accelerate U.S. leadership in quantum information science and technology (QIST) by updating the National Quantum Strategy, launching the QC-ADDS program to develop a scalable quantum computer, prioritizing next‑gen sensors and quantum networking, strengthening domestic QIST supply chains, safeguarding national security, expanding the quantum workforce, and coordinating international partnerships with allies, with multi‑agency timelines, potential private partnerships, and annual reporting to ensure commercialization, security, and scientific advancement keep pace with global competitors.

via The White House (.gov)|

#executive-order #national-security #qist

science3 months ago•5 min saved

Time Emerges from Entropy: Lab Mini-Universe Redefines Temporal Reality

Physicist Giovanni Barontini built a lab-sized ‘mini-universe’ by cooling ~24,000 rubidium atoms into a Bose-Einstein condensate and trapping them in a two-region optical setup. The atoms’ movement between a bright (observed) and a dark (unobserved) sector creates entropy exchange that defines an internal, emergent time—time that flows due to entropy rather than an external clock—offering experimental insight into time in quantum gravity and cyclic cosmology.

via ScienceAlert|

#bose-einstein-condensate #entropy #mini-universe

science3 months ago•41 min saved

One Photon, a Cascade of Particles: Quantum Split Defies Simple Expectations

Physicists attempted to split a single photon and instead observed a surprisingly large swarm of particles arising from the process, revealing complex quantum-field dynamics and particle-creation effects that go beyond a straightforward division of light. The finding challenges simple intuitions about how photons behave when energy is redistributed and points to richer pathways for light–matter interactions at extreme conditions.

via Yahoo|

#experiment #particle #photon