Exploring the Experiments & Interpretations of Quantum Physics

In summary, the conversation discusses the topic of quantum physics and its various experiments and theories. The main experiments mentioned are the double split experiment, black body radiation, photoelectric effect, quantum entanglement, uncertainty principle, and other atomic/nuclear experiments. The conversation also mentions the lack of a succinct summary of the main ideas and interpretations in quantum physics, and suggests creating one. The importance of the double slit experiment in understanding quantum mechanics is also highlighted, along with the concept of superposition and the uncertainty principle. The conversation ends with a mention of the theoretical mystery of why nature allows for continuous changes between pure states in quantum systems.
  • #1
skanskan
26
1
If you were to explain what quantum physics is by first introducing the historic experiments/observations undertaken by scientists and then explain the different possible accepted interpretations and theory...

How many experiments would you need at least? Which ones?

Double Split Experiment. (Young)
Black Body Radiation (Plank)
Photoelectric (Einstein and Milikan)
Quantum entanglement experiments.
Uncertainity principle experiments (Heisenberg)
Some other EPR experiment.
Other atomic/nuclear experiments: Zeeman, Rutherford, Bohr, Schrödinger, Dirca, Fermi, Pauli,Compton,Raman...

There are many books on quantum physics and mechanics, most of them too mathematical and thick, but I haven't been able to find a poster/diagram summarizing the big picture, the relationship between the main ideas and showing the different interpretations concisely. Is there any?
 
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  • #2
skanskan said:
but I haven't been able to find a poster/diagram summarizing the big picture, the relationship between the main ideas and showing the different interpretations concisely. Is there any?
Make one! :wink: (Would be neat! :smile:)
 
  • #3
The double slit with single electrons is all you need to show QM is required:
http://cds.cern.ch/record/1024152/files/0703126.pdf

It illustrates two key principles:
1. The principle of superposition which is a fundamental property of QM systems - its basically a postulate of QM although more can be said (eg mixed states)
2. The uncertainty principle which is derivable from the operator formalism of QM.

As Feynman says - it contains the basic mystery. I personally would not go that far - but it's pretty darn close.

For me the basic mystery isn't experimental - its theoretical:
http://www.scottaaronson.com/democritus/lec9.html

It's why nature chose to allow continuous changes between so called pure states. This means if you have a system in a certain state at time 0 and in another state at any time later there was no jumps etc in getting there - it was smooth and continuous. It's rather intuitive and in a certain sense at odds with quantitisation you hear a lot about in QM.

Just by the by the reason for quatitisation (systems are mostly quantisised in QM but not always) is a very deep issue that if you want to pursue is explained here:


Thanks
Bill
 
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1. What is quantum physics?

Quantum physics is the branch of physics that studies the behavior of matter and energy at a very small scale, such as atoms and subatomic particles. It explains the strange and counterintuitive phenomena that occur at this scale, such as the dual nature of particles as both waves and particles and the concept of quantum entanglement.

2. What are some real-world applications of quantum physics?

Quantum physics has many practical applications, including the development of technologies such as transistors, lasers, and computer memory. It is also used in medical imaging, cryptography, and quantum computing, which has the potential to greatly increase computing power and solve complex problems.

3. How do experiments in quantum physics differ from classical physics experiments?

In classical physics, experiments can be designed to predict the precise outcomes of events. However, in quantum physics, the behavior of particles is inherently probabilistic, meaning that the exact outcome of an experiment cannot be predicted. Additionally, quantum physics experiments often require specialized equipment and techniques to observe and manipulate particles at a very small scale.

4. What is the role of interpretations in quantum physics?

Interpretations in quantum physics refer to the various theories and explanations that attempt to make sense of the strange phenomena observed at a quantum level. These interpretations often involve different perspectives on the fundamental nature of reality and the relationship between the observer and the observed.

5. How does quantum physics challenge our understanding of the universe?

Quantum physics challenges our traditional understanding of the universe by introducing concepts such as superposition (the ability of a particle to exist in multiple states simultaneously) and the uncertainty principle (the idea that we cannot simultaneously know the exact position and momentum of a particle). It also raises questions about the role of consciousness in the universe and the nature of reality itself.

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