More History

• 1913- Neil Bohr stated that electrons retained wavelike properties.

• 1924- Louis de Broglie stated that all particles can be associated with waves. He concluded that any particle has wave-particle duality.

Quantum Theory

The Quantum field Theory

• if something moves, it is made of quantons, or quantum particles

• in nature actions smaller than ħ = 1.1 ⋅ 10 to the power of34 Js is not observed

• it addresses particle transformation

Main concepts

Usefullness

What is Quantum Physics?

**Quantum Physics!!!**

• Quantum physics is the science of the miniscule, it deals with the behavior of matter and energy on the molecular/ atomic level.

• It mostly deals with subatomic particles and waves on levels even smaller than microscopic levels.

• Quantum physics is the foundation for other fields of study such as: quantum chemistry, structural biology and particle physics.

• 1900- Planck came up with the theory that light with frequency v is emitted in small quantized lumps of energy that are multiplied by a constant

o Planck’s constant E=hv where h ≈ 6.63 · 10−34 J · s

o He was initially experimenting on how radiation is related to temperature

• 1905- Einstein hypothesized that the quantization was inherent to light, concluding that the lumps could be interpreted as particles (photons)

• 1925-Werner Heisenberg categorized a section of quantum mechanics that made use of matrix mechanics.

• 1926- Erwin Schrodinger formulated a section of quantum mechanics based on waves, his equation deals with the governance of how waves behave in space and time.

• 1926- Max Born interpreted Schrodinger’s wave and discovered it to be an amplitude probability and that it yields the probability of finding a particle in a given location.

• 1926- Paul Dirac proved that Heisenberg’s and Schrodinger’s versions of quantum mechanics could derived from the same general version of quantum mechanics.

Fields of Quantum Physics

Quantum Chromodynamics

Quantum Electrodynamics

• The field theory of stronger nuclear interaction.

• Photons and light it helps

• Deals with the interactions between quarks and gluons.

• Study led to lasers and night vision

• “The quantum field description of electromagnetism".

• It delves into electromagnetic decay, lamps, lasers, vacuum energy, Casimir effect, etc.

• Photon exchange in electrons

• Explains the theory of weak nuclear interaction, which explains radioactivity and heat production.

• Delves into particle transformation and includes corrections to “classical” electrodynamics.

Quantum Entanglement

Schrodinger's cat

Uncertainty Principle

String Theory

Young's Double split experiments

• Quantum mechanics explained atom structure and therefore most advances in chemistry and physics would not be possible

• Most theories in quantum physics are in use today

• Ideas of quantum entanglement will probably play a significant role in the future

**By Joseph Mugisha**