Pascual Jordan

! scientist · # tag · @ author

1902–1980 · Quantum mechanics, Quantum field theory, Mathematical physics

German theoretical physicist, one of the founders of quantum mechanics. He developed the matrix formulation of quantum mechanics simultaneously with Heisenberg and Born. He made fundamental contributions to quantum field theory, including the formalism of second quantization and the Jordan–Wigner transformation linking fermionic and spin systems. His works laid the foundations for modern quantum information and computation.

Biography

He studied at the University of Hanover, then at the University of Göttingen under Max Born. He worked at the University of Hamburg, the University of Rostock, and the University of Berlin. He collaborated with Werner Heisenberg and Wolfgang Pauli. Due to his membership in the Nazi party, his scientific legacy was long ignored. He was awarded the Max Planck Medal (1942). In the post-war years, he engaged in politics and the philosophy of science.

Key discoveries

Matrix mechanics: together with Born and Heisenberg formulated quantum mechanics in matrix form (1925).
Jordan algebra: introduced non-associative algebras for describing observables in quantum mechanics (1932).
Jordan–Wigner transformation: developed a method for mapping fermionic operators to spin operators, widely used in quantum simulations and computations (1928).
Quantum field theory: one of the founders, introduced the concept of second quantization, allowing the description of particle creation and annihilation.

💡 Despite his enormous contribution to quantum mechanics, Jordan remained in the shadow of his colleagues Born and Heisenberg, and his reputation suffered because of his political views. His works were rediscovered only at the end of the 20th century with the development of quantum computing.

Quote: ""Quantum mechanics is not just a theory, it is a new way of thinking about reality.""

Links in the knowledge graph 1

Related laws

Heisenberg uncertainty principle

Related scientists

Alain Aspect Erwin Schrödinger David Deutsch Louis de Broglie John Stewart Bell Satyendra Nath Bose Emilio Gino Segrè Paul Dirac

The Quantum Dance of Rings on a Doughnut

Scientists have pictured qubits as little rings rolling on a doughnut. All operations, including entanglement, turned out to be smooth movements on the surface. This perspective is visual and helps protect computations from errors.

arXiv:2602.15080 · 2026-02-16

Pascual Jordan

Biography

Key discoveries

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The Quantum Dance of Rings on a Doughnut