Quantum Physics 98 is not a well-defined term, but it could be interpreted as a course or a topic related to quantum physics, the branch of physics that deals with the behavior of matter and energy at the smallest scales. Quantum physics is based on the idea that physical quantities, such as the position, momentum, energy, and spin of a particle, can only take discrete values, called quanta. Quantum physics also introduces the concept of wave-particle duality, which states that all particles can behave like waves and vice versa, depending on how they are observed. Furthermore, quantum physics reveals the phenomenon of quantum entanglement, which means that two or more particles can share a quantum state and influence each other, even when they are separated by large distances.

Quantum physics is one of the most fascinating and challenging fields of science, as it often defies our common sense and intuition. It also has many applications and implications for technology, information, security, mathematics, and philosophy. Some of the topics that quantum physics covers are:

– The experimental basis of quantum physics, such as the photoelectric effect, the Compton effect, the double-slit experiment, the Stern-Gerlach experiment, and the EPR paradox.

– The mathematical formalism of quantum mechanics, such as the SchrÃ¶dinger equation, the Heisenberg uncertainty principle, the Dirac notation, the Hilbert space, the operators, the eigenvalues, and the eigenvectors.

– The single and multiple quantum states, such as the qubit, the superposition, the measurement, the collapse, the basis, the entanglement, and the Bell inequalities.

– The quantum operations, such as the unitary transformations, the quantum gates, the quantum circuits, and the quantum algorithms.

– The quantum systems, such as the harmonic oscillator, the hydrogen atom, the spin, the angular momentum, the tunneling, the scattering, and the resonance.

– The quantum technologies, such as the quantum cryptography, the quantum communication, the quantum metrology, the quantum sensing, the quantum simulation, and the quantum computing.

This is a brief overview of quantum physics, but there is much more to learn and explore. If you are interested in taking a course on quantum physics, you can check out some of the online resources available, such as:

– [Quantum Physics I](^2^), a course from MIT OpenCourseWare that introduces the basic features of quantum mechanics and covers the experimental basis of quantum physics, the wave mechanics, and the SchrÃ¶dinger equation in one and three dimensions.

– [Quantum Physics](^3^), a course from Khan Academy that covers the basics of quantum physics, such as the photoelectric effect, the Bohr model, the de Broglie wavelength, the Heisenberg uncertainty principle,