Oxford Physicists Create New Schrödinger's Cat State With 1 Trapped Ion
Updated
Updated · ScienceDaily · Jun 15
Oxford Physicists Create New Schrödinger's Cat State With 1 Trapped Ion
3 articles · Updated · ScienceDaily · Jun 15
Summary
Oxford researchers built a new family of Schrödinger’s cat-like quantum states by combining already nonclassical components, rather than the coherent-state wave packets used in earlier cat states.
A single trapped ion enabled the method: the team entangled the ion’s internal qubit-like state with its motion, then used a mid-circuit measurement to collapse that motion into the targeted superposition.
Direct state reconstruction showed interference patterns and Wigner negativity, confirming the motional states were genuine nonclassical superpositions rather than classical mixtures.
The approach also let researchers tune component size, orientation and separation, potentially supporting more error-resilient quantum computing, improved sensing and tests of the quantum-classical boundary.
Will Oxford's new 'super-quantum' states finally solve the error problem holding back powerful quantum computers?
Beyond computers, could this quantum breakthrough lead to sensors precise enough to probe the fundamental forces of the universe?
2026 Oxford Breakthrough: Programmable Nonclassical Cat States Enable Next-Generation Quantum Computing and Sensing
Overview
In June 2026, Oxford physicists achieved a major breakthrough by engineering a new family of Schrödinger's cat states using a single strontium-88 ion in a three-dimensional Paul trap. Unlike traditional methods, these cat states are built from highly nonclassical components—squeezed, trisqueezed, and quadsqueezed motional states—which are identified by their unique, often negative, Wigner functions. This leap into non-Gaussian quantum states marks a crucial step toward practical quantum technologies, as these new superpositions offer direct fingerprints of quantum behavior and open up new possibilities for quantum computing, sensing, and fundamental physics research.