Feb 4, 2022 08:49 AM
(This post was last modified: Feb 4, 2022 08:41 PM by C C.)
(1) The Participatory Universe
https://en.wikipedia.org/wiki/John_Archi..._Principle
(2) Discover Magazine - 2002 ... Does the universe exist if we aren't looking?: Our observations, he [John Wheeler] suggests, might actually contribute to the creation of physical reality. To Wheeler we are not simply bystanders on a cosmic stage; we are shapers and creators living in a participatory universe. Wheeler's hunch is that the universe is built like an enormous feedback loop, a loop in which we contribute to the ongoing creation of not just the present and the future but the past as well...
(3) Quantum Bayesianism: In physics and the philosophy of physics, quantum Bayesianism is a collection of related approaches to the interpretation of quantum mechanics, of which the most prominent is QBism (pronounced "cubism").
QBism is an interpretation that takes an agent's actions and experiences as the central concerns of the theory. QBism deals with common questions in the interpretation of quantum theory about the nature of wavefunction superposition, quantum measurement, and entanglement. According to QBism, many, but not all, aspects of the quantum formalism are subjective in nature.
For example, in this interpretation, a quantum state is not an element of reality -- instead it represents the degrees of belief an agent has about the possible outcomes of measurements. For this reason, some philosophers of science have deemed QBism a form of anti-realism. The originators of the interpretation disagree with this characterization, proposing instead that the theory more properly aligns with a kind of realism they call "participatory realism", wherein reality consists of more than can be captured by any putative third-person account of it...
(4) (title source) Why aliens and humans may not share the same reality
https://thenextweb.com/news/why-aliens-h...me-reality
EXCERPT: ... As New Scientist’s Amanda Gefter wrote in their fantastic article [below]... (MORE - missing details pertaining to the title)
(5) Do we create space-time? A new perspective on the fabric of reality
https://www.newscientist.com/article/mg2...f-reality/
EXCERPT (Amanda Gefter): . . . Now, two emerging sets of ideas are changing this story. For the first time, we can jump from one quantum perspective to another. This is already helping us solve tricky practical problems with high-speed communications. It also sheds light on whether any shared reality exists at the quantum level. Intriguingly, the answer seems to be no – until we start talking to each other.
When Einstein developed his theory of relativity in the early 20th century, he worked from one fundamental assumption: the laws of physics should be the same for everyone. [...] Einstein ... was forced to propose that the speed of light is constant for everyone, regardless of how fast they are moving...
He went on to develop these ideas into general relativity, which remains our best theory of gravity. But it isn’t the whole story. [...] Quantum theory deals with matter and energy and is even more successful than relativity.
But it paints a deeply unfamiliar picture of reality, one in which particles don’t have definite properties before we measure them, but exist in a superposition of multiple states. It also shows that particles can become entangled, their properties intimately linked even over vast distances. All this puts the definition of a reference frame on shaky ground. How do you measure time with a clock that is entangled, or distance with a ruler that is in multiple places at once?
Quantum physicists usually avoid this question by treating measuring instruments as if they obey the classical laws of mechanics developed by Isaac Newton. The particle being measured is quantum; the reference frame isn’t. The dividing line between the two is known as the Heisenberg cut. It is arbitrary and it is moveable, but it has to be there so that the measuring device can record a definite result.
Consider Schrödinger’s cat [...] This conundrum has long bothered Časlav Brukner ... He wanted to understand how to see things from multiple points of view in quantum theory. Following Einstein’s lead, he started from the assumption that the laws of physics must be the same for everyone, and then developed a way to mathematically switch between quantum reference frames. If we could describe a situation from either side of the Heisenberg cut, Brukner suspected that some truth about a shared quantum world might emerge.
What Brukner and his colleagues found in 2019 was a surprise. When you jump into the cat’s point of view, it turns out that – just as in relativity – things have to warp to preserve the laws of physics. The quantumness previously attributed to the cat gets shuffled across the Heisenberg cut.
From this perspective, the cat is in a definite state – it is the observer outside the box who is in a superposition, entangled with the lab outside. Entanglement was long thought to be an absolute property of reality. But in this new picture, it is all a matter of perspective. “What is quantum and what is classical depends on the choice of quantum reference frames,” says Brukner... (MORE - missing details)
(6) Go to the 19:15 mark for the discussion about QBism and its precusor of Wheeler's "participatory universe"
https://www.youtube-nocookie.com/embed/aGb9SVZhCwc
https://en.wikipedia.org/wiki/John_Archi..._Principle
(2) Discover Magazine - 2002 ... Does the universe exist if we aren't looking?: Our observations, he [John Wheeler] suggests, might actually contribute to the creation of physical reality. To Wheeler we are not simply bystanders on a cosmic stage; we are shapers and creators living in a participatory universe. Wheeler's hunch is that the universe is built like an enormous feedback loop, a loop in which we contribute to the ongoing creation of not just the present and the future but the past as well...
(3) Quantum Bayesianism: In physics and the philosophy of physics, quantum Bayesianism is a collection of related approaches to the interpretation of quantum mechanics, of which the most prominent is QBism (pronounced "cubism").
QBism is an interpretation that takes an agent's actions and experiences as the central concerns of the theory. QBism deals with common questions in the interpretation of quantum theory about the nature of wavefunction superposition, quantum measurement, and entanglement. According to QBism, many, but not all, aspects of the quantum formalism are subjective in nature.
For example, in this interpretation, a quantum state is not an element of reality -- instead it represents the degrees of belief an agent has about the possible outcomes of measurements. For this reason, some philosophers of science have deemed QBism a form of anti-realism. The originators of the interpretation disagree with this characterization, proposing instead that the theory more properly aligns with a kind of realism they call "participatory realism", wherein reality consists of more than can be captured by any putative third-person account of it...
(4) (title source) Why aliens and humans may not share the same reality
https://thenextweb.com/news/why-aliens-h...me-reality
EXCERPT: ... As New Scientist’s Amanda Gefter wrote in their fantastic article [below]... (MORE - missing details pertaining to the title)
(5) Do we create space-time? A new perspective on the fabric of reality
https://www.newscientist.com/article/mg2...f-reality/
EXCERPT (Amanda Gefter): . . . Now, two emerging sets of ideas are changing this story. For the first time, we can jump from one quantum perspective to another. This is already helping us solve tricky practical problems with high-speed communications. It also sheds light on whether any shared reality exists at the quantum level. Intriguingly, the answer seems to be no – until we start talking to each other.
When Einstein developed his theory of relativity in the early 20th century, he worked from one fundamental assumption: the laws of physics should be the same for everyone. [...] Einstein ... was forced to propose that the speed of light is constant for everyone, regardless of how fast they are moving...
He went on to develop these ideas into general relativity, which remains our best theory of gravity. But it isn’t the whole story. [...] Quantum theory deals with matter and energy and is even more successful than relativity.
But it paints a deeply unfamiliar picture of reality, one in which particles don’t have definite properties before we measure them, but exist in a superposition of multiple states. It also shows that particles can become entangled, their properties intimately linked even over vast distances. All this puts the definition of a reference frame on shaky ground. How do you measure time with a clock that is entangled, or distance with a ruler that is in multiple places at once?
Quantum physicists usually avoid this question by treating measuring instruments as if they obey the classical laws of mechanics developed by Isaac Newton. The particle being measured is quantum; the reference frame isn’t. The dividing line between the two is known as the Heisenberg cut. It is arbitrary and it is moveable, but it has to be there so that the measuring device can record a definite result.
Consider Schrödinger’s cat [...] This conundrum has long bothered Časlav Brukner ... He wanted to understand how to see things from multiple points of view in quantum theory. Following Einstein’s lead, he started from the assumption that the laws of physics must be the same for everyone, and then developed a way to mathematically switch between quantum reference frames. If we could describe a situation from either side of the Heisenberg cut, Brukner suspected that some truth about a shared quantum world might emerge.
What Brukner and his colleagues found in 2019 was a surprise. When you jump into the cat’s point of view, it turns out that – just as in relativity – things have to warp to preserve the laws of physics. The quantumness previously attributed to the cat gets shuffled across the Heisenberg cut.
From this perspective, the cat is in a definite state – it is the observer outside the box who is in a superposition, entangled with the lab outside. Entanglement was long thought to be an absolute property of reality. But in this new picture, it is all a matter of perspective. “What is quantum and what is classical depends on the choice of quantum reference frames,” says Brukner... (MORE - missing details)
(6) Go to the 19:15 mark for the discussion about QBism and its precusor of Wheeler's "participatory universe"
