Quantum Mechanics
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Always been fascinated by quantum physics and the possibility of alternate realities. Discussion: t.me/schrodinger_box Discord: discord.gg/w5PPkgga6U ClubHouse: clubhouse.com/club/quantum-physics
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Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
The first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g−2 Experiment for the positive muon magnetic anomaly aμ≡(gμ−2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ωa between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ˜ω′p in a spherical water sample at 34.7 °C. The ratio ωa/˜ω′p, together with known fundamental constants, determines aμ(FNAL)=116592040(54)×10−11 (0.46 ppm).
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Magnetic-field measurement and analysis for the Muon g−2 Experiment at Fermilab
The Fermi National Accelerator Laboratory (FNAL) Muon g−2 Experiment has measured the anomalous precession frequency aμ≡(gμ−2)/2 of the muon to a combined precision of 0.46 parts per million with data collected during its first physics run in 2018. This paper documents the measurement of the magnetic field in the muon storage ring. The magnetic field is monitored by systems and calibrated in terms of the equivalent proton spin precession frequency in a spherical water sample at 34.7∘C.
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Quantum Mechanics and Path Integrals
by
Richard P. Feynman and Albert R. Hibbs
From astrophysics to condensed matter theory, nearly all of the modern physics employs the path integral technique. In this presentation, the developer of path integrals and one of the best-known scientists of all time, Nobel Prize–winning physicist Richard P. Feynman, presents unique insights into this method and its applications. Avoiding dense, complicated descriptions, Feynman articulates his celebrated theory in a clear, concise manner, maintaining a perfect balance between mathematics and physics.4 647
31 years ago Voyager 1 completed its mission to explore the outer solar system. For years before the primary mission ended, Carl Sagan and his Voyager teammates begged NASA to take a photo of the Earth once the spacecraft left Neptune. Finally, after years of work, NASA agreed and on February 14th, 1990, at a distance of 6 billion Kms Voyager turned itself towards the inner solar system and opened and closed its shutter for a final time. The sunlight reflecting off our planet's was the last light Voyager 1 ever collected in its camera.
The photo showed several striped bands of sunlight stretched across the frame and nestled in one of the sunbeams was an almost imperceptible speck of light.
It was us, and a reflection of our cosmic fragility.4 647
2020's Biggest Breakthroughs in Physics
Last year, two teams of physicists made profound progress on ideas that could bring about the next revolution in physics. Another still has identified the source of a long-standing cosmic mystery.
• Progress on the Black Hole Information Paradox
• Physicists Create Room-Temperature Superconductors
• Astronomers Uncover the Source of Fast Radio Bursts
© Symmetry Magazine4 647
Brian Greene and Sir Roger Penrose: World Science Festival
Winner of the 2020 Nobel Prize in Physics, Sir Roger Penrose joins Brian Greene to share insights into black holes, general relativity, quantum mechanics, the mathematical road toward reality, the evolution and fate of the universe, and consciousness. In this conversation, they discuss Sir Penrose's extraordinary career and the wealth of impactful ideas he has developed.4 647
“There is no God. No one created the universe and no one directs our fate.”
--Stephen Hawking
