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REFERENCES
Why time only goes one way: https://youtu.be/pvPxCtrXT1c
The link between time, entropy & information https://youtu.be/T6CxT4AESCQ
Loop quantum gravity https://youtu.be/dpmx8D5CXRA
What if time stopped? https://youtu.be/t8e3fdjB_ZM
Illusion of time https://tinyurl.com/ya4asocb
Is time an illusion? https://tinyurl.com/22e26hkf
Does time really exist? https://tinyurl.com/y9xj274e
Ask Ethan: Does time exist? https://tinyurl.com/2apbb2nq
CHAPTERS
0:00 Attack on time
0:54 Newton’ vs Einstein vs Rovelli
3:23 What’s the origin of time being an illusion
5:26 How can events occur without time?
6:55 Research showing time not being real & sponsor Incogni
10:03 Why does time FEEL so real?
12:09 Is time an illusion? What’s the truth?
SUMMARY
What if time is not real, but an illusion? Isaac Newton believed time was absolute and ticked at the same rate for everyone, everywhere. But Albert Einstein shattered that view with the theory of relativity. He showed that time is intertwined with space to form what we now call “space-time.” Time can stretch and compress.
But physicist Carlo Rovelli proposes an even more radical idea. Rovelli argues that time might not exist at all. He suggests that time is not a fundamental feature of reality but an in invention of our brains in order to make sense of the world, to impose a cause and effect to events so they are not nonchaotic.
Craig Callender, a professor of philosophy, also supports this idea. The idea of time as an illusion comes from quantum mechanics. Einstein’s theory of general relativity treats time as an intrinsic part of reality. But in Quantum mechanics, time isn’t malleable, and doesn’t change like other properties of a quantum system. Recording the passage of time requires an observer to consult a clock external to the quantum system.
There’s is no arrow of time in quantum mechanics. Quantum theories can be formulated in a way that doesn’t even include time. Time in quantum mechanics is not built into the formulation. Some quantum mechanics equations like the Wheeler-DeWitt equation which is a quantum description of gravity, don’t include time. According to it, the universe can be described purely in terms of events and relationships, and do not require time.
How can events occur without time passing? One way to think of it, at least in the standard Copenhagen interpretation of quantum mechanics, is a series interactions happening in the form of quantum wave collapse. The wave function for a particle collapses every time it interacts with its surroundings. And a series of wave collapses, one after another, feels like the passage of time. The analogy is like a set of dominoes. Each domino falling is a wave function collapse. Put them all together in a series and it looks like time passing forwards.
Rovelli says that “Events” — not things — are the basic building blocks of reality. Metaphorically, it’s like watching a movie. What you’re really seeing is a series of still pictures or frames.
A new research paper seems to support this idea. The authors say that key to this is quantum entanglement. The authors argue that time at a quantum level, is an emergent phenomenon due to entanglement. Their experiments suggest that time emerges for one object through its quantum entanglement with another quantum object acting as a clock. But for an unentangled system, time does not exist.
But if time isn’t fundamental, why does it FEEL so real to us? The answer, Rovelli says, lies in our ignorance. The flow of time, the forward march from past to future, is a result of our inability to see the world in all its microscopic detail. Our limited knowledge forces us to experience the world in a simplified way, where time appears to flow in one direction. He says thermodynamics forces this perception of time ticking in only one direction, that is entropy. Rovelli suggests that the “arrow of time” is directly tied to this increase in entropy. There is no other way that our brains can interpret this steady march towards more and more disorder than the ticking of a clock in the forward direction.
So, Is time an illusion, a construct of our limited brains? Or is it an intrinsic part of the universe? Most physicists stand by time and will say that time does exist. But the answer is not knowable with what we know today because we cannot test whether time is not real.
#time
#quantummechanics
General relativity makes the concept of time a fundamental part of reality. But this theory also formally killed the concept of gravity. It showed that gravity is an emergent feature from spacetime curvature, not a fundamental property of matter or of the universe, as Newton had defined it. So time could also be similarly shown to not be a fundamental property of the universe but emergent.
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When you are young, seconds pass by painfully slow as you watch the clock hands approach 3pm at the end of school. When you are old like me, time is indeed an illusion as it disappears in front of you. All that's left of it when you age is a collection of fragmented memories of it's existence and passing.
Time is the perception of the speed of light. Anything traveling at C experiences no time between events. Anything moving below C experiences delays between events.
The universe has already happened in an instant for all photons moving through it. We're embedded within it and not moving at the speed of light, so for us that instant lasts an eternity.
Like always,time isn't fundamental, it's relative quantity so 😂😂😂
Time is like the tablet I'm watching this on. I view it as one solid object. One thing. And yet it's made up of atoms that are by far mostly empty space. What I see isn't "real" yet it's real enough to me because my brain finds it useful to perceive it as such.
Time is just a construct to label a number of events – rotations of the planet, revolutions around the Sun, etc. Without events there can't be time.
If you buy a new thermometer, it will show the temperature. If you buy a new clock, it won't show the current time because there's no such thing. When the clock starts ticking, we call those ticks time.
Both Roveli and Smolin are correct. It is an intrinsic part of any of the universes in all the possible multiverses, yet it is an illusion to any "observer" there, only giving the feel of "existence" of that universe to the observer and arising out of the ever-changing correlations of quadrillions of events there. It is only in the "mind" of the observer which explains its absence in quantum world and its appearance in relation to entanglement and increasing entropy. Its great that you brought this out in the limited video time.
The idea of the entropy change creating an illusion of time is just so incredibly stupid! Any change requires TIME to be happening. How a change may occur without time? Isn’t it obvious? So the entropy cannot change if there is no time. It’s astonishing how one cannot see this triviality.
I have the feeling this concept could then also explain why the passage of time is different at different speeds and why the speed of light is constant.
I think the only reason we place so much emphasis on time is because we evolved on a planet with a steady rising and setting sun that we used to judge the passage of “time.” The rigid nature of time disappears as soon as we are removed from the familiar cycle, e.g. space travel, cave exploration, deep-water exploration.
Time is an illusion. example tomorrow there is no such thing- it's an illusion 😮
Time is the ETERNAL NOW!
Time is ellapsed . In the past of instant dynamic now
AMAZING VIDEO 💚💋💚💋💚💋💚💋💚💋💚💋
No time in quantum physics? uhm.. waves and wavefunction wouldn't look quite the same without a timeline imo. It would just be a line. Makes for easier calculation though.
Waste of time, that I don’t have. Time doesn’t exist anyway 🙂
To be able to talk about human -invented notion of time, first of all, you have to understand what it is, what it can actually represent, and what it cannot.
Here's the objective definition of time, based on how it has been practically used in subjective reality created by human extremely limited knowledge.
Time is a representation of human subjective understanding of the physical universe surrounding human species. It's not any physical existence, being merely a notion in human mind and its notional operations, like human -invented notions of mathematics. Its symbolic unit values are based on the Earth' s endless and rotational motion and the effects of sunlight on the Earth' s surface
What it can actually represent is a continuous sequence of changes of physical structure and positions in space of all forms of matter in the universe, as a marking instrument for human limited knowledge to distinguish such changes
Although it doesn't actually exists in the physical universe, being merely a notion invented by human extremely limited knowledge, and existing only within human mind, without it, you would have got no idea of such human -invented notions as natural sciences , including quantum mechanics simply because it has been the standard foundation of all human development.
Ex, without it, no human invented notion of order, such 1st, 2nd, 3rd…. could be possible, and there would be no way to organize work places, schools and other social organizations., and no way how to distinguish the differences among what have happened, what are happening, and what will happen. No such human -invented notions as velocity or speed, acceleration, gravitational force, electromotive force, machemanical force, mathematical notions, chemical reactions could be possible, It can be said that the entire human civilisation is totally absolutely dependent on human -invented notion of time, although it does not physically exist anywhere in the physical universe as the way how Einstein subjective understanding describes it. If Newton had meant that changes physical structures and positions in space are applicable to the entire infinite space of the physical universe, then he would have been objectively correct. But his subjective statement shows that he believed that time was a form of physical existence, and that its values are constant or the same everywhere in the universe is problematic simply because it is obviously a human construct in human mind, but not any where else.
The only one thing which will be objectively true about human -invented notion of time, in all human generations from the starting point of human history to the current human generations, and next human generations, is that time actually represents distances in space which the Earth makes travelling around the Sun, and what it can actually do is to function like a marking tool for human limited knowledge to understand the sequence of changes of physical structures and positions in space of all forms of matter in the universe, which are observable to human limited knowledge , and such changes are naturally and inevitably constantly applicable to the whole universe
Every form of matter in the universe is always in a continuous sequence of changes of both physical structures and positions in space. Only human subjective understanding is standing still in human extremely limited knowledge
The physical universe will still exist as the way how it always is, no matter whether human species and human invented notions exist or are to be wiped out from the the surface of this planet , due to their current destructive development
If time isn't real, what causes aging? I've always considered entropy and time being intertwined. But if time is an emergent property of entropy, is it possible that by halting entropy in a biological system, that aging could be stopped? And what underlies entropy in a biological system especially in adults, since growth has been fundamentally paused in adult, and it's mostly about the replacement of worn out cells in the same order as the previous cell?
Personally, I think time and entropy are not causative for each other, but are properties that emerge from the use of energy, which makes them to be entangled in existence. 🤔🤔🤔Or maybe not! 🤔🤔Somehow, I know energy is the culprit here!! 🤔🤔🤔🤔🤔
What if time is THE fundamental force, and everything else is emergent or relative. Time does not bend or stretch or compress, our reality does to fit within its unalterable path. There is no spoon.
I think it's important for people to remember that there's a fundamental difference between a theory or an idea not being falsifiable and not being falsifiable *yet*. It borders on human arrogance and exceptionalism to presume the inability lies with the universe and not our own limitations.
TIME might be not real. Over TIME may be we will understand. 😅
5:17 Describe the universe without time by using events instead? Events happen as the the wave function collapses when it interacts with something? Happen? Interact? Collapse? Those are verbs, and verbs require time. I'll believe one of these papers that say time doesn't exist when they are written without using verbs.
Our understanding of time might not be the full story, but it works for how we live.
I assumed this was how scientists thought of time anyway… weird 😅
Time is the measurement of change. Like the 3 spatial dimensions are measurements of length, width, and height/depth.
This may lead to something. Finally.
Time is a great concept but does not really exist. If it’s real, how fast it’s moving? Has anyone ever been to past or future for at least once? What is the tiniest fraction of time? Now if time is not real and spacetime is one entity, how real is the space? Have you ever been there. You have always been here and now. Scientists should research this.
I’m stuck at the beginning re our “experience” of time travelling at different speeds v it’s only when we compare that we see a difference.
I travel to Alpha Centauri at light speed. You see the journey takes 4 years. What do I see? Did I feel time travelling at a different speed, does my clock not say it took say it took 4 years? Is it only when we compare that they seem to differ?
my take: time is not real on its own, but causality is fundamental, so things do not happen all at once, but there is also no way of going back.
Time is a measurement which uses quantities. Quantities, "math", does not exist.
So sure, it's been known forever.
It's not an "illusion", it just isn't something that relate to reality by itself. A thing change, and we measure that as time. A thing moves from point A to B and we measure that as time and distance. That people would not know that in the 21th century is worst than flat Earth theory. People need some education. Things are real, measurement are real if they measure actual things and the quantities of matter they have, or their position, etc. Time and distance by themselves don't exist. Congrats for saying the obvious. Also you need an observer to measure things. That's a concept physicists struggle with.
The real problem is that absolute truth in physics is not real, nor will it ever be. "Laws" are nothing more than predictive models thar seem to work pretty well. As long as not contadicted, they remain the "law". Even the super advanced aliens dont know the absolute physical truth. They only have better models than we do.