Qubits
Artificial atoms used in quantum computers and in a Fermilab experiment to detect axion dark matter. These systems have ground and excited states whose energy gap can be tuned to match dark matter energy.
Videos Mentioning Qubits

Leonard Susskind on Richard Feynman, the Holographic Principle, and Unanswered Questions in Physics
Y Combinator
Quantum bits, the basic unit of quantum information. Susskind mentions that classical computers struggle to simulate systems with more than a few hundred qubits due to massive entanglement.

Leonard Susskind: Quantum Mechanics, String Theory and Black Holes | Lex Fridman Podcast #41
Lex Fridman
The basic unit of quantum information, analogous to classical bits. Susskind highlights the massive scalability challenges in quantum computing, noting 400 qubits would require more information than can be stored in the universe.

Dark Matter Day at Fermilab
Fermilab
Artificial atoms used in quantum computers and in a Fermilab experiment to detect axion dark matter. These systems have ground and excited states whose energy gap can be tuned to match dark matter energy.

Quantum Computers Could Solve These Problems
Sabine Hossenfelder
Quantum bits that quantum computers use for calculations, capable of superposition and entanglement.