# Practical stuff in quantum physics

• Demystifier
In summary, the conversation discussed the idea of creating a thread to collect links to practical material on quantum physics. Some links that were suggested included the Wikipedia page on common integrals in quantum field theory, a list of quantum-mechanical systems with analytical solutions, and various articles on creation and annihilation operators, ladder operators, angular momentum operators, and spin. It was also mentioned that the Wolfram computation/knowledge engine, which includes a simplified version of Mathematica, can be a useful tool for obtaining results in quantum physics.
Demystifier
Gold Member
I think it could be useful to have a thread where we can collect links to very practical material on quantum physics.

For the start, I would like to give the link to the wikipedia page on Common integrals in quantum field theory:
https://en.wikipedia.org/wiki/Common_integrals_in_quantum_field_theory

ShayanJ

Dr. Courtney
The online Wolfram computation/knowledge engine
http://www.wolframalpha.com/
is not only for quantum physics, but is extremely useful.
In particular, it contains a simplified free online version of Mathematica.
And even if you don't know how to use Mathematica, you can easily get useful results.
For example, you can type "solve quantum harmonic oscillator" or something like that, and you will get very useful results (try it!).

PWiz and Dr. Courtney

## 1. What is quantum entanglement?

Quantum entanglement is a phenomenon in quantum physics where two or more particles become connected in a way that their states are correlated, even when separated by large distances. This means that measuring the state of one particle will immediately affect the state of the other particle, regardless of the distance between them.

## 2. How does quantum computing work?

Quantum computing is a type of computing that uses quantum phenomena, such as superposition and entanglement, to perform operations on data. Unlike classical computers that use bits to represent information, quantum computers use quantum bits (qubits) which can exist in multiple states simultaneously. This allows quantum computers to perform certain calculations much faster than classical computers.

## 3. Can quantum mechanics explain consciousness?

There is currently no scientific evidence to suggest that quantum mechanics can fully explain consciousness. While some theories propose a connection between quantum mechanics and consciousness, this is still a topic of ongoing research and debate in the scientific community.

## 4. What is the uncertainty principle?

The uncertainty principle, also known as Heisenberg's uncertainty principle, states that it is impossible to know the exact position and momentum of a particle at the same time. This is because the act of measuring one property of a particle will inevitably affect the other property, introducing uncertainty into the measurement.

## 5. How is quantum physics being applied in real-world applications?

Quantum physics has led to advancements in various fields such as computing, cryptography, and sensing technology. For example, quantum computers are being developed to solve complex problems in fields like chemistry and finance, and quantum cryptography is being used to secure communication networks. Additionally, quantum sensors are being used for precise measurements in fields such as navigation and medical imaging.

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