The Quantum Internet

  • Published on Jul 15, 2019
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    When we finally have a quantum internet you’ll be able to simultaneously like and dislike this video. But we don’t. So I hope you like it. The world is widely regarded as being well and truly into the digital age, also called the information age. No longer are economies and industries solely characterised by the physical goods they produce, and in fact some of the largest companies in the world produce no physical goods at all: digital information is a commodity in its own right. As discussed in a previous episode, this worldwide digital economy is fundamentally reliant on certain cryptographic processes. Currently these processes work in the realm of classical cryptography, but one day soon this may not be enough and so quantum cryptographic methods and algorithms are being developed. However, it’s one thing to design a protocol, it’s something else entirely to build a system to support it. To understand what needs to be done we need to get to the foundations of quantum mechanics - we need to talk about quantum information theory.
    Hosted by Matt O'Dowd
    Written by Graeme Gossel and Matt O'Dowd
    Graphics by Leonardo Scholzer
    Directed by Andrew Kornhaber
    Produced By: Kornhaber Brown
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Comments • 1 298

  • mateusz franiczek

    Reading a quantum state? Wild

  • Zes
    Zes 5 days ago


  • Rob Wood
    Rob Wood 14 days ago


  • sgcollins
    sgcollins 18 days ago

    I wonder who makes these very pretty background layer animations ... and how they do it. I wish I could do that.

  • Joseph Ferri
    Joseph Ferri 20 days ago

    Can we use the nearly unlimited solar power available in space to create antimatter in quantities useful as a portable energy source?

  • Starman
    Starman 24 days ago

    Google said it achieved it

  • S k A
    S k A 24 days ago

    I feel like, these guys have a lot of stuff to get Confused on.. Than i do...

  • Jayveersinh Raj
    Jayveersinh Raj 26 days ago

    Bro make a video on Arc reactor.

  • AndroidDoctorr
    AndroidDoctorr Month ago

    I fucking hate it when people say "people have been saying we'll have fusion in 20 years for the last 50 years" NO THEY FUCKING HAVEN'T. Predictions have centered around 2025-2030 since the 1970s. Occasionally someone will say it might take longer or might happen sooner, but the bell curve has not moved. The center is still around 2030. That's where the best predictions were in 1970 and 1980 and 1990 and 2000 and 2010 and now.

  • Art Curious
    Art Curious Month ago

    It’s true that nuclear reactors cannot explode like an atomic weapon but under certain conditions the build up of hydrogen will cause explosions strong enough to destroy the containment unit. Fukushima was a good example.

  • Nate Aeilts
    Nate Aeilts Month ago

    Who the heck bothers disliking these videos?

  • Anmol Virk
    Anmol Virk Month ago

    AI and Quantum Computing combined are likely to end the human race.

  • Karsten Lesko
    Karsten Lesko Month ago

    Easy way to prevent a computer from being hacked by a quantum computer: Add a wait time between password/access attempts to 1 per second. A 8 character password would take 89,456.8 years to crack (assuming no password changes and only letters and numbers are used)

  • shadfurman
    shadfurman Month ago +1

    Yeah but... My dad told me they've been predicting fusion 20 years away for 50 years 30 years ago...

  • Dev.I.L
    Dev.I.L Month ago

    I disliked and liked this video synchronously.

  • Ramping Ram
    Ramping Ram Month ago

    couldn't we have instant communication with a similar method?

  • Scott Havens
    Scott Havens Month ago

    stop being me

  • Sawyer West
    Sawyer West Month ago

    Did nobody notice the clicking sound at 0:40

  • Balsey Dean De Witt, Jr.

    I AM LOST!

  • johnny 71c
    johnny 71c Month ago

    Quantum theory is awesome and weird and even both at the same time lol

  • Brian Twardzik
    Brian Twardzik Month ago

    The internet will soon be purchasable in a box. And FPS will have zero ms lag no matter where you live. Haha, I wish

    • A TJ W
      A TJ W Month ago

      Back in my day, the internet came on a disc.

  • FireVulpez
    FireVulpez Month ago


  • simflyr1957
    simflyr1957 Month ago

    "does not compute"

  • M eh
    M eh Month ago

    Explain to me: why do two entangled particles require a medium (fiber optic) to communicate through.. isn't the idea of a entangled particle that it doesn't mind the distance and does not require a medium if 1a is spin up for 1b to be spin down?

  • James Fox
    James Fox 2 months ago

    @PBSSpaceTime - Wouldnt it Had ben Easier just to State that You Werent - TELEPATHIC - i mean after all - Everthing you Just Spouted Out Directly Connects to The Telepathy Reasoning Definition

  • Cederic V
    Cederic V 2 months ago


  • manamiemyr
    manamiemyr 2 months ago

    quantum internet is still easier to understand than women

  • David Hrzenjak
    David Hrzenjak 2 months ago

    Didn't understand shit

  • clouded
    clouded 2 months ago

    i feel like I'm fuckin Homer Simpson right now trying to watch this video

    • clouded
      clouded 2 months ago

      i like computer

  • ruatsanga white
    ruatsanga white 2 months ago

    The real question is can i like this video 2times with a quantum computer

  • guy ?
    guy ? 2 months ago

    Please never cut anything relevant for length

  • Nick Leo
    Nick Leo 2 months ago

    Okay so it's just like Minecraft redstone got it

  • Patrick Boerman
    Patrick Boerman 2 months ago

    You know the first quantum link was already established in 2016? these guys from the TU Delft in The Netherlands explain you how.

  • Patrick Boerman
    Patrick Boerman 2 months ago +1

    Thanks TU Delft for making this possible!

  • Clever Man
    Clever Man 2 months ago

    3:45 Just wondering, how many people thought about Minecraft at this moment?

  • Grant Jarvis
    Grant Jarvis 2 months ago

    You are saying something I always thought possible from reading bout quantum computing. However, I have heard physicists on net & read one book that you can't use quantum entanglements due to it being impossible to transfer information over distance. So confusing to me.

  • cosmos and physical laws

  • subhabrata das
    subhabrata das 2 months ago

    I was born dumb.

  • Ben M
    Ben M 2 months ago

    If quantum computing lives up to its unfathomable theorized potential, and it becomes commercially available and used widely,, our definition of "information", and how it is used, managed and transacted, will be different than it has been up until then. Computing a million times faster than we can today, and with quantum properties no less, will change our world-and us in ways we cannot predict. Our concepts of space, time, causation, state, stability, chaos, even reality will change. We today will not recognize and grasp what will seem like a different universe to us. It might well be different universes.

    • Ben M
      Ben M 2 months ago

      I wonder if only the privileged 1% class will be allowed to learn about, control and benefit by quantum computing. The other 99‰ will be denied knowledge, understanding, control and benefits of quantum systems. We will be controlled and leveraged by it if necessary by those who effectively live in the quantum dimension.

  • Username - not found
    Username - not found 2 months ago



  • X Gen
    X Gen 2 months ago

    So could a black hole be considered analogous to a quantum computer? Because from 6:00 onward it looked just like the entanglement interactions associated with Hawking radiation, where the information is stored on the event horizon.

  • X Gen
    X Gen 2 months ago

    The future generation of quantum cryptographic protocols also means that the days of pirating movies and music are numbered.

  • alan smithee
    alan smithee 2 months ago

    Barely a minute in and you're already telling me to qit...

  • william tepe
    william tepe 2 months ago +4

    Quantum teleportation was one of the most difficult things I remember learning about recently. I think you did a good job. I think this perhaps could have been a series though. The only reason I was able to understand the concept was through the quantum circuit diagrams.

  • Igmu Tanka Luta
    Igmu Tanka Luta 2 months ago

    Could matter cycle through fusion and fission like a pendulum to create something like alternating current?

  • StevenRud
    StevenRud 2 months ago

    Magnificent video! Thanks for uploading!👍🏻👍🏻😎😎

  • Ghozer
    Ghozer 2 months ago

    Hahahaha, nice use of the Tricorder sound there at around the 3 min 45 mark ;)

  • Alex Levin
    Alex Levin 2 months ago +1

    use earths electro magnetic field as a guide for the qbits

  • Adesh POZ
    Adesh POZ 2 months ago

    I don't get anything. :/

  • cmilkau
    cmilkau 2 months ago

    The polarization symbols look like deliberately made to be hard to tell apart (particularly when you want an overview and are not looking at them individually). Why not just horizontal and vertical bars? Even proper double arrows woul be a huge improvement.

  • cmilkau
    cmilkau 2 months ago

    Deceptive name. X-) You had called this QIT I'd have watched it two weeks ago.

  • valentin zhegin
    valentin zhegin 2 months ago +1


  • Canadian Man
    Canadian Man 2 months ago

    ... and on that day, your bitcoin will be worthless.

  • Sajid's Toys Review's Backup Account


  • Harsh Mangal
    Harsh Mangal 2 months ago

    Liked it after Matt's very first remark.

  • Dom Ex
    Dom Ex 2 months ago

    I want to see a series of videos , looking at the 1980s Tomorrows World series explaining what they got right and what they got wrong , Lots of Astronomy points in those shows , its what first got me interested in science , and laughed at when i embarrassed my science teach with a question 20 years ahead of its time. ( dismissive teaching because they didnt know the answer)

  • TJ Lamb
    TJ Lamb 2 months ago

    This is truly amazing. I can’t wait to see the quantum age.

  • parsida Fidelity
    parsida Fidelity 2 months ago

    finally be able to understand the Quantum Time Wastage techniqu

  • Rilo DeAnn
    Rilo DeAnn 2 months ago

    I am so fascinated by the information in these spacetime videos. I only understand about 20-50% of what you are talking about but I’m not going to stop watching anytime soon! These episodes instill a sense of wonder and magic inside me.

  • William Switzer
    William Switzer 2 months ago

    Quantum information theory: the diseased leftists already invented it. They call it true lies.