Quantum physics revolutionized our understanding of the subatomic world, from Planck's quanta in 1900 to modern quantum computing and entanglement. This timeline traces key milestones including the photoelectric effect, Bohr atom, Schrödinger equation, and Bell's theorem.
Max Planck proposes that energy is quantized to explain blackbody radiation, founding quantum theory. His constant h becomes fundamental. #quantum #physics
Albert Einstein proposes light quanta (photons) to explain the photoelectric effect, earning the 1921 Nobel Prize. This supports Planck's quanta. #quantum #physics
Ernest Rutherford's gold foil experiment reveals a dense nucleus, leading to the planetary model of the atom. #quantum #physics
Niels Bohr proposes quantized electron orbits, explaining hydrogen spectrum. This model introduces quantum jumps. #quantum #physics
Einstein predicts stimulated emission, laying groundwork for lasers. He also introduces probability coefficients for transitions. #quantum #physics
Otto Stern and Walther Gerlach demonstrate spatial quantization of angular momentum, confirming quantum behavior. #quantum #physics
Louis de Broglie suggests particles have wave nature, with wavelength λ = h/p. This wave-particle duality is central to quantum mechanics. #quantum #physics
Werner Heisenberg formulates quantum mechanics using matrices, avoiding unobservable orbits. This is the first complete quantum theory. #quantum #physics
Wolfgang Pauli states that no two electrons can occupy the same quantum state, explaining atomic structure and the periodic table. #quantum #physics
Erwin Schrödinger introduces wave equation, providing a powerful tool for quantum mechanics. The equation describes quantum state evolution. #quantum #physics
Max Born interprets the wavefunction squared as probability density, introducing inherent randomness in quantum mechanics. #quantum #physics
Werner Heisenberg states that position and momentum cannot be simultaneously known precisely, a fundamental limit. #quantum #physics
Key quantum physicists debate interpretations, including Bohr and Einstein. The conference solidifies the Copenhagen interpretation. #quantum #physics
Paul Dirac formulates relativistic quantum equation, predicting antimatter. The positron is discovered in 1932. #quantum #physics
Einstein, Podolsky, and Rosen argue quantum mechanics is incomplete, highlighting entanglement. This spurs later Bell's theorem. #quantum #physics
Erwin Schrödinger proposes a cat in a superposition state to illustrate quantum measurement problems. #quantum #physics
Willis Lamb and Robert Retherford measure the Lamb shift, leading to quantum electrodynamics (QED) development. #quantum #physics
Richard Feynman develops diagrammatic representation for particle interactions, crucial for QED calculations. #quantum #physics
David Bohm proposes a deterministic hidden variable interpretation of quantum mechanics, reviving de Broglie's ideas. #quantum #physics
Chen Ning Yang and Robert Mills formulate non-abelian gauge theory, foundation for the Standard Model. #quantum #physics
John Bell proves that local hidden variable theories cannot reproduce all quantum predictions, enabling experimental tests of entanglement. #quantum #physics
Alexander Holevo publishes the Holevo bound, limiting classical information extractable from quantum systems. #quantum #physics
Richard Feynman suggests using quantum systems to simulate physics, laying groundwork for quantum computing. #quantum #computing
Alain Aspect performs experiments confirming violation of Bell inequalities, supporting quantum entanglement. #quantum #physics
Charles Bennett and Gilles Brassard invent first quantum cryptography protocol, using polarized photons. #quantum #cryptography
David Deutsch proposes the first quantum algorithm, showing quantum computers can solve certain problems faster. #quantum #computing
Bennett et al. propose quantum teleportation using entanglement, later experimentally demonstrated. #quantum #physics
Peter Shor develops quantum algorithm for integer factorization, threatening RSA cryptography. #quantum #computing
Ignacio Cirac and Peter Zoller propose a trapped-ion quantum gate, leading to experimental quantum computing. #quantum #computing
Lov Grover discovers quantum algorithm for unstructured search, providing quadratic speedup. #quantum #computing
Anton Zeilinger's group teleports photons over a short distance, confirming theoretical predictions. #quantum #physics
Peter Shor and others develop quantum error correction, essential for fault-tolerant quantum computing. #quantum #computing
IBM and Stanford demonstrate Shor's algorithm on a 7-qubit NMR quantum computer, factoring 15. #quantum #computing
Zeilinger's team teleports photons across the Danube River, advancing quantum communication. #quantum #physics
D-Wave Systems claims first commercial quantum computer, though controversy over quantum speedup persists. #quantum #computing
Serge Haroche and David Wineland win Nobel for measuring and manipulating individual quantum systems. #quantum #physics
Multiple experiments close detection and locality loopholes, confirming quantum mechanics definitively. #quantum #physics
China launches first quantum communications satellite, enabling entanglement distribution over 1200 km. #quantum #space
Google's Sycamore processor performs a task in 200 seconds that would take a supercomputer 10,000 years. #quantum #computing
Chinese team with Zuchongzhi processor demonstrates quantum advantage with 56 qubits. #quantum #computing
Nobel Prize awarded for experiments with entangled photons, establishing quantum information science. #quantum #physics
IBM unveils Condor, a 1121-qubit superconducting processor, advancing toward fault-tolerant quantum computing. #quantum #computing