Physicist explains quantum mechanics | Solving many-body quantum on a computer: Dr. Jon D’Emidio
Interview with Quantum Physicist Dr. Jon D’Emidio on the weirdness of quantum mechanics, its origins, quantum entanglement, quantum spin, and the complexity required to simulate a many-particle quantum system on a computer. We begin with an “explain like I’m five” explanation of the most basic building blocks of quantum theory and then progressively build on the fundamentals required for understanding Jon’s research on large-scale quantum systems using Quantum Monte Carlo Simulations. We also discuss the current status of quantum computing, and how it is changing the landscape of quantum research. We conclude with a discussion on the ever-growing sphere of quantum pseudoscience and methods for distinguishing between legitimate quantum research and ‘quantum woo.’
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Dr. Jon D’Emidio is an active quantum physicist at Donostia International Physics Center (DIPC) in San Sebastian, Spain. Jon studies critical phase phenomena related to quantum many-body systems. Jon’s work has appeared multiple times in Physics Review Letters (https://journals.aps.org/prl/), and his most recent publication entitled “Universal Features of Entanglement Entropy in the Honeycomb Hubbard Model” was highlighted by the editors of PRL as a featured article.
Previously, Jon held a post-doctoral fellowship at Ecole Polytechnique in Lausanne, Switzerland, and he completed his Ph.D. in theoretical condensed matter physics at the University of Kentucky in 2017.
By the end of this video, you’ll have a better understanding of the fundamental principles of quantum mechanics, entanglement, methods for simulating quantum many-body systems, and the current status and challenges of quantum computing.
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📃Here's an outline:
1:54 | Jon D’Emidio’s Influences towards a career in Quantum Physics
11:11 | Post-Doc Experience
16:20 | What is Quantum Physics?
20:48 | Spin and the Stern-Gerlach Experiment
32:41 | Quantum Theory Foundations: Schrodinger’s Equation, Wavefunctions, Particle in a Box
40:45 | Two Electron Systems
44:23 | Many-Body Quantum Systems & Universality
56:21 | Quantum Entanglement
1:11:04 | Editor’s Highlight Publication in Physics Review Letters
1:12:27 | Entanglement Entropy
1:24:43 | Quantum Monte Carlo
1:31:35 | Density Matrix Renormalization Group
1:35:44 | The Honeycomb Hubbard Model
1:41:54 | Primary Findings and Implementation Challenges
1:58:50 | Quantum Computers and Quantum Computation
2:14:14 | Quantum Misinformation and Pseudoscience
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🔗References and Links Mentioned in Video:
1) “Universal Features of Entanglement Entropy in the Honeycomb Hubbard Model”, Jonathan D’Emidio, et al., Phys. Rev. Lett. 132, 076502 – Published 14 February 2024:
https://journals.aps.org/prl/abstract...
2) Jon’s recent presentation during Theories, Experiments and Numerics on Gapless Quantum Many-body Systems (#gapless-c24) conference at the Kavli Institute for Theoretical Physics (KITP) on May 13 - 16, 2024 in Santa Barbara, CA:
• Entanglement entropy at deconfined & Gross...
3) “1D Particle in a Box”:
https://ocw.mit.edu/courses/5-61-phys...
4) “Introduction to Quantum Mechanics” by David J. Griffiths:
https://www.google.com/books/edition/...
5) On my reading list: “Quantum Mechanics: The Theoretical Minimum” by Leonard Susskind:
https://www.google.com/books/edition/...
🙊 Errata🙊
A few corrections to some spoken inaccuracies have been brought to my attention:
1) It was incorrectly stated photons have spin 0. Photons are considered spin-1 gauge bosons. The point remains the same, that is, the spin of photons is distinct from that of electrons.
2) It was stated that the Stern-Gerlach experiment used Nickel atoms. The Stern-Gerlach experiment was conducted using Silver atoms. Here's an excellent video on the Stern-Gerlach experiment:
• spin : Stern and Gerlach experiment
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