Feb 15, 2023 05:22 PM
(This post was last modified: Feb 15, 2023 05:24 PM by C C.)
https://arstechnica.com/science/2023/02/...mechanics/
EXCERPT: Yet despite its overwhelming success as a framework for understanding what nature does, quantum mechanics tells us very little about how nature works. Quantum mechanics provides a powerful set of tools for successfully making predictions about what subatomic particles will do, but the theory itself is relatively silent about how those subatomic particles actually go about their lives.
For example, take the familiar concept of a quantum jump. An electron in an atom changes energy levels and thus either absorbs or emits energy in the form of one photon of radiation. No big deal, right? But how does the electron “jump” from one energy level to another? If it moves smoothly, like literally everything else in the Universe, we would see the energy involved change smoothly as well. But we don’t.
So does the electron magically disappear from one energy level and magically reappear in another? If it does, name one other physical object in the Universe that acts like that. While you’re at it, please give me a physical description of the unfolding of this magic act. I'll wait.
Quantum mechanics is completely silent on how the electron changes orbitals; it just blandly states that it does and tells us what outcomes to expect when that happens.
How are we supposed to wrap our heads around that? How can we possibly come to grips with a theory that doesn’t explain how anything works? People have struggled with these questions ever since quantum mechanics was developed, and they’ve come up with a number of ways to make sense of the processes involved in quantum behavior. Let’s explore three of these interpretations of quantum mechanics to see if any of them satisfy our cravings for a "why" behind all this odd phenomenology... (MORE - details)
COVERED: The Copenhagen interpretation ... The many-worlds interpretation ... Lost in the multiverse ... The pilot-wave interpretation
RELATED (scivillage): The weirdness of quantum mechanics forces scientists to confront philosophy
EXCERPT: Yet despite its overwhelming success as a framework for understanding what nature does, quantum mechanics tells us very little about how nature works. Quantum mechanics provides a powerful set of tools for successfully making predictions about what subatomic particles will do, but the theory itself is relatively silent about how those subatomic particles actually go about their lives.
For example, take the familiar concept of a quantum jump. An electron in an atom changes energy levels and thus either absorbs or emits energy in the form of one photon of radiation. No big deal, right? But how does the electron “jump” from one energy level to another? If it moves smoothly, like literally everything else in the Universe, we would see the energy involved change smoothly as well. But we don’t.
So does the electron magically disappear from one energy level and magically reappear in another? If it does, name one other physical object in the Universe that acts like that. While you’re at it, please give me a physical description of the unfolding of this magic act. I'll wait.
Quantum mechanics is completely silent on how the electron changes orbitals; it just blandly states that it does and tells us what outcomes to expect when that happens.
How are we supposed to wrap our heads around that? How can we possibly come to grips with a theory that doesn’t explain how anything works? People have struggled with these questions ever since quantum mechanics was developed, and they’ve come up with a number of ways to make sense of the processes involved in quantum behavior. Let’s explore three of these interpretations of quantum mechanics to see if any of them satisfy our cravings for a "why" behind all this odd phenomenology... (MORE - details)
COVERED: The Copenhagen interpretation ... The many-worlds interpretation ... Lost in the multiverse ... The pilot-wave interpretation
RELATED (scivillage): The weirdness of quantum mechanics forces scientists to confront philosophy
