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Quantum Physics: Planck Quanta to Photoelectric Effect & Entanglement

Encyclopedia/1. The Cosmos & The Natural World/2. Physics & Chemistry/01. Quantum Physics & Atomic Theory  •  Curated by Admin Timeline.sg

Quantum physics revolutionized our understanding of the subatomic world, from Planck's quanta in 1900 to modern quantum computing and entanglement. Key milestones include Einstein's photoelectric effect, Bohr's atom, Heisenberg's uncertainty principle, Schrödinger's equation, and Bell's theorem.

Chronological Storyline (40 Milestones)

Dec 14, 1900 CE

Planck Introduces Energy Quanta

Max Planck proposes that energy is emitted in discrete packets called 'quanta' to explain blackbody radiation, founding quantum theory. #physics #quantum

Planck Introduces Energy Quanta
Planck Introduces Energy Quanta
By Darth Kule - Own work, Public domain, https://commons.wikimedia.org/w/index.php?curid=10555337
Mar 18, 1905 CE

Einstein Explains Photoelectric Effect

Albert Einstein proposes that light consists of quanta (photons) to explain the photoelectric effect, later earning him the Nobel Prize. #physics #quantum

Einstein Explains Photoelectric Effect
Einstein Explains Photoelectric Effect
By Ponor - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=92684859
Jul 1, 1913 CE

Bohr Model of the Atom

Niels Bohr introduces a model of the hydrogen atom with quantized electron orbits, explaining spectral lines. #physics #quantum

Bohr Model of the Atom
Bohr Model of the Atom
By JabberWok at English Wikipedia - Transferred from en.wikipedia to Commons., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2639910
Nov 1, 1924 CE

de Broglie Proposes Matter Waves

Louis de Broglie suggests that particles have wave-like properties, introducing wave-particle duality. #physics #quantum

Jul 1, 1925 CE

Heisenberg Develops Matrix Mechanics

Werner Heisenberg formulates matrix mechanics, the first complete quantum theory. #physics #quantum

Jan 1, 1926 CE

Schrödinger Equation Published

Erwin Schrödinger publishes his wave equation, providing a powerful tool for quantum mechanics. #physics #quantum

Mar 1, 1927 CE

Heisenberg Uncertainty Principle

Werner Heisenberg states the uncertainty principle, limiting simultaneous knowledge of position and momentum. #physics #quantum

Heisenberg Uncertainty Principle
Heisenberg Uncertainty Principle
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Oct 1, 1927 CE

Copenhagen Interpretation Formulated

Niels Bohr and Werner Heisenberg develop the Copenhagen interpretation, emphasizing wavefunction collapse and complementarity. #physics #quantum

Jan 1, 1928 CE

Dirac Equation Unifies QM and Relativity

Paul Dirac formulates the Dirac equation, predicting antimatter and merging quantum mechanics with special relativity. #physics #quantum

May 1, 1935 CE

Einstein-Podolsky-Rosen Paradox

Einstein, Podolsky, and Rosen argue that quantum mechanics is incomplete, introducing the EPR paradox. #physics #quantum

Einstein-Podolsky-Rosen Paradox
Einstein-Podolsky-Rosen Paradox
By Doris Ulmann - This image is available from the United States Library of Congress's Prints and Photographs division under the digital ID cph.3g04940.This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing., Public domain, https://commons.wikimedia.org/w/index.php?curid=2468828
Aug 1, 1935 CE

Schrödinger's Cat Thought Experiment

Erwin Schrödinger proposes the cat paradox to illustrate quantum superposition and measurement. #physics #quantum

Schrödinger's Cat Thought Experiment
Schrödinger's Cat Thought Experiment
By Dhatfield - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=4279886
1947 CE

Lamb Shift Discovered

Willis Lamb measures the Lamb shift, leading to the development of quantum electrodynamics. #physics #quantum

Lamb Shift Discovered
Lamb Shift Discovered
By Joel Holdsworth (Joelholdsworth) - Non-Derived SVG of Radiate gluon.png, originally the work of SilverStar at Feynmann-diagram-gluon-radiation.svg, updated by joelholdsworth., Public domain, https://commons.wikimedia.org/w/index.php?curid=1764161
1948 CE

Feynman Diagrams Introduced

Richard Feynman introduces Feynman diagrams to visualize particle interactions in quantum electrodynamics. #physics #quantum

1952 CE

Bohmian Mechanics Proposed

David Bohm develops a deterministic hidden-variable interpretation of quantum mechanics. #physics #quantum

1954 CE

Yang-Mills Theory Non-Abelian Gauge

Chen Ning Yang and Robert Mills formulate non-Abelian gauge theory, foundational for the Standard Model. #physics #quantum

1957 CE

Many-Worlds Interpretation

Hugh Everett III proposes the many-worlds interpretation, where all quantum possibilities coexist. #physics #quantum

Many-Worlds Interpretation
Many-Worlds Interpretation
By Christian Schirm - Own work, based on File:ISO_7010_W003.svg and File:Skull_and_Crossbones.svg, inspired by File:MWI_Schrodingers_cat.png, CC0, https://commons.wikimedia.org/w/index.php?curid=17512691
1964 CE

Bell's Theorem Published

John Bell proves that no local hidden-variable theory can reproduce all quantum predictions, enabling experimental tests. #physics #quantum

1970 CE

Quantum Teleportation Proposed

Charles Bennett and others propose quantum teleportation using entanglement. #physics #quantum

Quantum Teleportation Proposed
Quantum Teleportation Proposed
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1974 CE

Quantum Field Theory in Curved Spacetime

Stephen Hawking predicts Hawking radiation using quantum field theory near black holes. #physics #quantum

1982 CE

Aspect Experiment Tests Bell Inequality

Alain Aspect performs experiments confirming violation of Bell's inequality, supporting quantum entanglement. #physics #quantum

Aspect Experiment Tests Bell Inequality
Aspect Experiment Tests Bell Inequality
By Ecole polytechnique from Paris - PHYSIQUE QUANTIQUE : LES TRAVAUX D'ALAIN ASPECT, PROFESSEUR À L’X, COURONNÉS DU PRIX NOBEL 2022, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=126015843
1984 CE

Quantum Cryptography BB84 Protocol

Charles Bennett and Gilles Brassard invent BB84, the first quantum cryptography protocol. #physics #quantum

1985 CE

Quantum Computing Concept by Deutsch

David Deutsch describes a universal quantum computer, laying groundwork for quantum computing. #physics #quantum

Quantum Computing Concept by Deutsch
Quantum Computing Concept by Deutsch
By Dev Jadiya - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=158261563
1993 CE

Quantum Teleportation Experiment

First experimental demonstration of quantum teleportation by Anton Zeilinger's group. #physics #quantum

1994 CE

Shor's Algorithm for Factoring

Peter Shor develops a quantum algorithm for integer factorization, threatening RSA encryption. #physics #quantum

1995 CE

Bose-Einstein Condensate Created

Eric Cornell and Carl Wieman produce the first Bose-Einstein condensate, a quantum state of matter. #physics #quantum

Bose-Einstein Condensate Created
Bose-Einstein Condensate Created
By Vectorized version by AG Caesar, original by DG85 - Inspired by a work from Wikipedia User DG85 https://commons.wikimedia.org/wiki/File:QuantumPhaseTransition.png, Public domain, https://commons.wikimedia.org/w/index.php?curid=67110336
1997 CE

Quantum Dots Discovered

Quantum dots, nanoscale semiconductor particles with quantum properties, are developed. #physics #quantum

Quantum Dots Discovered
Quantum Dots Discovered
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1998 CE

Quantum Eraser Experiment

Marlan Scully and colleagues demonstrate the quantum eraser, illustrating complementarity. #physics #quantum

2001 CE

Nobel Prize for Bose-Einstein Condensate

Cornell, Ketterle, and Wieman win Nobel for achieving Bose-Einstein condensation. #physics #quantum

2004 CE

Quantum Memory Demonstrated

First demonstration of a quantum memory for storing quantum information. #physics #quantum

2007 CE

D-Wave Demonstrates Quantum Annealing

D-Wave Systems claims first commercial quantum computer using quantum annealing. #physics #quantum

D-Wave Demonstrates Quantum Annealing
D-Wave Demonstrates Quantum Annealing
By Mwjohnson0 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=44720502
2010 CE

Quantum Supremacy Experiment Proposed

John Preskill coins 'quantum supremacy' for tasks beyond classical computers. #physics #quantum

2012 CE

Nobel Prize for Quantum Optics

Serge Haroche and David Wineland win Nobel for measuring and manipulating individual quantum systems. #physics #quantum

2015 CE

Loophole-Free Bell Test

Multiple experiments close detection and locality loopholes, confirming quantum nonlocality. #physics #quantum

2016 CE

Quantum Satellite Micius Launched

China launches the Micius satellite for quantum communication experiments. #physics #quantum

Quantum Satellite Micius Launched
Quantum Satellite Micius Launched
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2017 CE

Quantum Teleportation Over 1,200 km

Micius satellite achieves quantum teleportation over 1,200 km, a record. #physics #quantum

Oct 23, 2019 CE

Google Claims Quantum Supremacy

Google's Sycamore processor performs a task in 200 seconds that would take a supercomputer 10,000 years. #physics #quantum

2020 CE

Quantum Advantage in Boson Sampling

Chinese team demonstrates quantum advantage using boson sampling with 76 photons. #physics #quantum

2021 CE

Nobel Prize for Climate Modeling

Syukuro Manabe, Klaus Hasselmann, and Giorgio Parisi win Nobel for complex systems, including quantum spin glasses. #physics #quantum

Oct 4, 2022 CE

Nobel Prize for Entanglement Experiments

Alain Aspect, John Clauser, and Anton Zeilinger win Nobel for experiments with entangled photons. #physics #quantum

2023 CE

Quantum Error Correction Milestone

Google and other groups demonstrate improved quantum error correction, a key step toward fault-tolerant quantum computing. #physics #quantum