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Tag: quantum

  • Eutelsat Quantum: Europe’s reprogrammable satellite

    Eutelsat Quantum: Europe’s reprogrammable satellite

    Soon Eutelsat Quantum will be launched into a geostationary orbit on board an Ariane 5 from Kourou. This advanced telecommunications satellite is revolutionary as it offers its users the ability to reconfigure the satellite while in orbit. This offers a previously unknown degree of flexibility during its 15-year lifetime. It allows for satellites of this type to be mass-produced, making them extremely interesting for commercial parties and industry. The satellite was developed as an ESA partnership project with operator @Eutelsat SA and prime contractor @Airbus working together with ESA to share the risk of developing this innovative piece of technology.

    Learn more about Quantum: https://bit.ly/ESAQuantum

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    #ESA
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  • Supremația cuantică a fost atinsă!

    Supremația cuantică a fost atinsă!

    mecanica cuantica: https://www.youtube.com/watch?v=IAizWhy-oJ4
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  • If You Don’t Understand Quantum Physics, Try This!

    If You Don’t Understand Quantum Physics, Try This!

    A simple and clear explanation of all the important features of quantum physics that you need to know. Check out this video’s sponsor https://brilliant.org/dos
    I have spent a lot of time thinking about how best to explain quantum physics and this is the result of all my hours of pondering, and I’m really happy with how it turned out. I decided to just explain it as it actually is, rather than rely on analogies. The video explains the quantum wavefunction, particle-wave duality, the measurement problem, the double-slit experiment, superposition, entanglement, quantum tunnelling, the Heisenberg uncertainty principle, and energy quantisation. Let me know if it was helpful! Cheers Dx

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    Further reading
    For a more detailed introduction to quantum physics: ‘The Quantum Universe’ by Brian Cox and Jeff Forshaw is good.
    And a slightly more advanced but fantastic description of what we do and don’t know about quantum physics is the excellent book ‘Beyond Weird’ by Philip Ball.

    Music by
    Dominic ‘Wibblyfingers’ Walliman

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  • How to See Quantum with the Naked Eye

    How to See Quantum with the Naked Eye

    How can you train yourself to be a quantum detector? Quantum interactions happen at impossibly small scales. But the life-size effects are all around you. You can detect quantum mechanics all over — if you know how to look for it.

    Subscribe: https://www.youtube.com/WhatThePhysics?sub_confirmation=1

    Have questions, ask me:
    twitter @gkestin

    Check out https://www.youtube.com/user/EugeneKhutoryansky, who was kind enough to share his water wave animation with us.

    ADVANCED SCIENTIFIC NOTE: Quantum mechanics would be much more obvious if we had very sensitive eyes. If your eyes identified each photon individually, you would see them land as described in the video, and only build up to this wave pattern. The pattern that we see can be explained classically by waves, it is *ultimately* a quantum phenomenon. The only reason it’s hard to tell is because our light detectors (eyes) aren’t quite sensitive enough.

    CREDITS:

    Host, Producer: Greg Kestin

    Researcher: Samia Bouzid

    Writers: Samia Bouzid, Greg Kestin

    Scientific Consultant: Louis Deslauriers

    Editorial Input from: Julia Cort, Ari Daniel

    Animation and Editing: Greg Kestin

    Special thanks: Entire NOVA team

    From the producers of PBS NOVA © WGBH Educational Foundation

    Funding provided by FQXi

    Music provided by APM

    Footage of bridge and man holding child: Videoblocks

    Sound effects: Freesound.org

  • 3 Things ‘Faster Than Light’

    3 Things ‘Faster Than Light’

    These 3 things go “faster” than the speed of light. How’s that even possible?
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    More about the experiment:
    Marissa Giustina’s research: http://arxiv.org/abs/1511.03190

    Advanced scientific note about Doppler: If there is a light moving away from you at constant velocity in static flat (Minkowski) space-time, no matter how red it is, you will never conclude it is going faster than light. But, here I am discussing the conclusions one might come to if you mistakenly use Doppler in the context of the curved space-time of the universe (where there is expansion). Interpreting the huge redshift as a result of the doppler effect, could make one think that galaxies we see are moving away at speeds approaching light speed. And since what we are actually seeing is light from those galaxies from billions of years ago, and given that the universe is expanding, you might be tempted to say that they have since “accelerated” to faster than the speed of light. You might go further and say that there are more distant galaxies that we can’t see which are moving away even faster. So you might conclude there are galaxies moving faster than light in the universe. But the redshift isn’t from doppler and this “acceleration” of the expanding universe isn’t actually causing a true increase in velocity.

    Sometimes astronomers do say there is a faster than light “recession speed” by pretending the expansion of the universe is causing distant galaxies to move away from each other at a corresponding velocity, but that’s misleading. In general relativity, you can actually have an increase in space between objects without causing a corresponding increase in the relatives velocities of those objects.

    CREDITS:

    Host, Writer, Animator, Editor:
    Greg Kestin

    From the producers of PBS NOVA
    © WGBH Educational Foundation

    Funding provided by FQXi

    Special thanks:
    Marissa Giustina
    Nick Hutzler
    Julie Elksy
    Byron Drury
    Jacob Barandes
    Tyler Howe
    Lissy Herman
    Ari Daniel
    Lauren Aguirre
    Kristine Allington
    Allison Eck
    Anna Rotschild

    MEDIA CREDITS:

    Music provided by APM:
    Deep_Science_No-perc
    Mysteries_of_Science_B
    Dreaming_of_the_Stars_a
    Curiosity_Kills_the_Cat_2
    Conundrum_a

    Images:
    Stars – Rene Barrios
    Earth – Eirika
    galaxy spiral (by coornio – diviantart)
    Squirrel with scissors – 60811670 – Dollarphotoclub
    Equations – 91613623 – Dollarphotoclub
    Maxresdefault – Sean Stewart
    Marissa Giustina – Lammerhuber
    Tangled cat – David Swayze
    Cat doll – Vicky Somma

    Stock footage:
    train-exits-tunnel – Pond5
    Bin_pulsar_442 – Courtesy of Nasa
    Expanding in space (40294) – Courtesy of Nasa
    WMAP_archive – Courtesy of Nasa

  • So You Want a Degree in Physics

    So You Want a Degree in Physics

    Even if you don’t, watch anyway. Maybe I’ll convince you. And if not, maybe I’ll impart some important skills or perspectives upon you. A lot of what I say can be applied not only to physics, but to other academic disciplines as well.

    Online resources for learning math:

    Khan Academy
    https://www.khanacademy.org/math/
    patrickjmt
    https://www.youtube.com/user/patrickJMT
    Dr. Chris Tisdell
    https://www.youtube.com/user/DrChrisTisdell/
    MIT Open Courseware
    https://www.youtube.com/user/MIT

    Here are some resources for learning physics (in order of increasing difficulty)

    Amateur (little to no math)
    A Briefer History of Time by Stephen Hawking
    The Grand Design by Stephen Hawking and Leonard Mlodinow
    The Elegant Universe by Brian Greene
    Cosmos by Carl Sagan
    Fearful Symmetry by Anthony Zee

    Recruit (some calculus, maybe a DiffEQ here or there)
    University Physics by Roger Freedman
    Physics (Vol 1 and 2) by Resnick, Halliday, and Krane

    Regular (know calculus cold, and have a good handle on DiffEQs)
    An Introduction to Mechanics by Kleppner and Kolenkow
    Electricity and Magnetism by Purcell
    Classical and Statistical Thermodynamics by Ashley Carter

    Hardened (all of the “baby maths” should be second nature to you)
    Classical Mechanics by Taylor
    Introduction to Electrodynamics by Griffiths
    Introduction to Quantum Mechanics by Griffiths
    Introduction to Elementary Particles by Griffiths

    Veteran (you will not survive)
    A Modern Approach to Quantum Mechanics by Townsend
    Quantum Field Theory in a Nutshell by Anthony Zee

    Studies indicating that studying in pairs is ideal:
    Hake, R. R. (1998). Interactive-engagement versus traditional methods: A six-thousand-student survey of mechanics test data for introductory physics courses. American journal of Physics, 66, 64.

    Hoellwarth, C., & Moelter, M. J. (2011). The implications of a robust curriculum in introductory mechanics. American Journal of Physics, 79, 540.
    Prince, M. (2004). Does active learning work? A review of the research. Journal of engineering education, 93(3), 223-231.
    http://www.sciencedirect.com/science/article/pii/S030095720100449X
    http://www.colorincolorado.org/article/13346/

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