Proof of Baker-Hausdorff Lemma - Find Online for Quantum Mechanics

  • Thread starter the_kid
  • Start date
In summary, the Baker-Hausdorff Lemma is a mathematical tool used in quantum mechanics to calculate the exponential of a sum of operators. It simplifies calculations by transforming original operators into a set that is easier to work with. It has many applications in quantum mechanics, including in quantum field theory, information theory, and computing. There are online resources available for a proof of the lemma, and it can be applied in research projects involving non-commuting operators. A strong understanding of the lemma and its applications is necessary before using it in research.
  • #1
the_kid
116
0
I'm studying QM out of Sakurai's book and on page 95 (equation 2.3.47), he states the Baker-Hausdorff Lemma without proof. I've scoured the internet in search of an elementary proof (i.e. one that does not rely on lie algebras, etc.), but have come up empty. I was wondering if anyone knew of a place I could find a proof online.
 
Physics news on Phys.org
  • #2
Check out problems 3.3 & 3.4 in the text on Quantum Mechanics by Ballentine. They are solved in the appendix D. It should be a start to the general formula, indeed without involving topological issues.
 

FAQ: Proof of Baker-Hausdorff Lemma - Find Online for Quantum Mechanics

What is the Baker-Hausdorff Lemma in quantum mechanics?

The Baker-Hausdorff Lemma is a mathematical tool used in quantum mechanics to calculate the exponential of a sum of operators. It is often used in the study of quantum systems with non-commuting operators.

How is the Baker-Hausdorff Lemma used in quantum mechanics?

The Baker-Hausdorff Lemma is used to simplify the calculation of the exponential of a sum of operators. It allows for the transformation of the original operators into a new set of operators that are easier to work with.

What are the applications of the Baker-Hausdorff Lemma in quantum mechanics?

The Baker-Hausdorff Lemma has many applications in quantum mechanics, including in the study of quantum field theory, quantum information theory, and quantum computing. It is also used in the derivation of the time evolution operator in quantum mechanics.

Is there a proof for the Baker-Hausdorff Lemma available online?

Yes, there are many online resources that provide a proof of the Baker-Hausdorff Lemma in quantum mechanics. These resources include textbooks, academic papers, and lecture notes from universities.

How can I apply the Baker-Hausdorff Lemma in my quantum mechanics research?

If you are working on a research project in quantum mechanics that involves non-commuting operators, the Baker-Hausdorff Lemma can be a useful tool for simplifying calculations and obtaining results. It is important to have a strong understanding of the lemma and its applications before applying it to your research.

Similar threads

Back
Top