This timeline traces the foundational epochs and key milestones in quantum entanglement and information, from early quantum mechanics to modern quantum networks and computing, highlighting global contributions.
Max Planck introduces the concept of energy quanta to solve the black-body radiation problem, laying the foundation for quantum theory. #quantum #physics
Albert Einstein explains the photoelectric effect using light quanta (photons), providing early evidence for quantum nature of light. #quantum #physics
Niels Bohr proposes a quantum model of the hydrogen atom, incorporating quantized electron orbits and explaining spectral lines. #quantum #atomic
Satyendra Nath Bose sends a paper to Einstein on photon statistics, leading to Bose-Einstein statistics, a cornerstone of quantum mechanics. #quantum #statistics
Werner Heisenberg develops matrix mechanics, the first complete formulation of quantum mechanics. #quantum #mechanics
Erwin Schrödinger formulates his wave equation, providing a wave-mechanical description of quantum systems. #quantum #wave
Niels Bohr and Werner Heisenberg develop the Copenhagen interpretation, the predominant interpretation of quantum mechanics. #quantum #interpretation
Werner Heisenberg introduces the uncertainty principle, fundamental to quantum mechanics, limiting precision of conjugate variables. #quantum #uncertainty
Erwin Schrödinger proposes his cat thought experiment to illustrate quantum superposition and entanglement. #quantum #entanglement
Einstein, Podolsky, and Rosen publish the EPR paradox, arguing that quantum mechanics is incomplete and highlighting entanglement. #entanglement #quantum
David Bohm develops the pilot-wave theory, a hidden variable interpretation of quantum mechanics that reproduces standard predictions. #quantum #hiddenvariables
John Bell publishes Bell's theorem, showing that local hidden variable theories cannot reproduce all quantum predictions, enabling experimental tests of entanglement. #entanglement #theorem
Stuart Freedman and John Clauser perform the first experimental test of Bell's inequalities, providing evidence against local hidden variables. #entanglement #experiment
Alain Aspect and colleagues perform improved Bell tests, closing the locality loophole and further confirming quantum entanglement. #entanglement #experiment
Charles Bennett and Gilles Brassard propose BB84, the first quantum key distribution protocol, using quantum states for secure communication. #quantum #cryptography
Charles Bennett et al. propose the quantum teleportation protocol, using entanglement to transfer quantum states between distant particles. #teleportation #entanglement
Charles Bennett and Stephen Wiesner propose quantum dense coding, which uses entanglement to transmit two classical bits per qubit. #quantum #densecoding
Charles Bennett, Gilles Brassard, Claude Crépeau, Richard Jozsa, Asher Peres, and William Wootters publish the general teleportation scheme. #teleportation #entanglement
Peter Shor discovers a quantum algorithm for integer factorization in polynomial time, demonstrating quantum computing's potential. #quantum #computing
Lov Grover develops a quantum search algorithm that provides a quadratic speedup over classical algorithms. #quantum #computation
Anton Zeilinger's group in Innsbruck demonstrates quantum teleportation of a photonic qubit over short distance. #teleportation #experiment
Peter Shor and Andrew Steane independently discover quantum error correction codes, enabling fault-tolerant quantum computing. #quantum #errorcorrection
David Wineland's group demonstrates a two-qubit quantum gate using trapped ions, a milestone in quantum computing. #quantum #gate
id Quantique launches the first commercial quantum key distribution system, bringing quantum cryptography to market. #quantum #cryptography
Researchers achieve quantum key distribution over 144 km between La Palma and Tenerife, using entangled photons. #quantum #cryptography
Scientists at the University of Science and Technology of China teleport quantum states over 16 km, a record at that time. #teleportation #entanglement
Multiple groups, including Zeilinger, propose and design experiments to close both locality and detection loopholes simultaneously. #entanglement #Belltest
Three independent groups (Delft, Vienna, NIST) simultaneously perform loophole-free Bell tests, definitively ruling out local hidden variables. #entanglement #experiment
China launches the Micius satellite, the first quantum communications satellite, enabling space-based quantum key distribution and entanglement. #quantum #satellite
Micius satellite achieves quantum teleportation from ground to orbit over 1400 km, a major step for global quantum networks. #teleportation #quantum
First demonstrations of quantum internet nodes, including entanglement swapping and teleportation between laboratory networks. #quantum #internet
Google announces their Sycamore processor performs a computation in 200 seconds that would take a classical supercomputer 10,000 years, claiming quantum supremacy. #quantum #computing
Pan Jianwei's team demonstrates Jiuzhang, a photonic quantum computer that performs Gaussian boson sampling, achieving quantum supremacy. #quantum #computing )
Researchers successfully teleport quantum states over 1 km of deployed fiber in a metropolitan area, advancing quantum networking. #quantum #networking
Alain Aspect, John Clauser, and Anton Zeilinger awarded Nobel Prize for experiments with entangled photons, establishing quantum information science. #physics #Nobel
Micius satellite enables entangled photon distribution over 1200 km, setting a new distance record for quantum entanglement. #entanglement #satellite
Multiple groups demonstrate logical qubits with error correction below the fault-tolerance threshold, a key step toward practical quantum computing. #quantum #errorcorrection