Oxford Physicists Create 2 Exotic Quantum States in Single Trapped Ion
Updated
Updated · studyfinds.com · Jun 9
Oxford Physicists Create 2 Exotic Quantum States in Single Trapped Ion
2 articles · Updated · studyfinds.com · Jun 9
Summary
Using a single trapped strontium ion, Oxford physicists experimentally produced trisqueezed and quadsqueezed superposition states for the first time, extending quantum-state engineering beyond simpler squeezed-state ingredients.
Precisely timed laser pulses and a midcircuit measurement let the team decouple the ion’s internal state from its motion without disturbing the target vibrational state, enabling repeated buildup of more complex superpositions.
All of the new states showed Wigner negativity, a key marker of nonclassical behavior that is difficult for ordinary computers to simulate and can support quantum advantage.
The rotationally symmetric states could improve quantum error correction and precision sensing, and the method may transfer to superconducting circuits, optical cavities, tweezers, and heavier oscillators for gravity-related tests.
The results still come with limits: the system used one ion near—not at—the ground state, coherence was constrained by a 300-quanta-per-second heating rate, and quadsqueezed-state detection errors were relatively high.
Can Oxford's powerful new quantum states be scaled into a computer before competing technologies win the race?
As hardware creates exotic quantum states, is our software ready to harness their true power?
Is the future of quantum computing fewer, powerful qudits or vast arrays of simpler qubits?
Oxford Physicists Achieve World’s First Experimental Quadsqueezing: A Fourth-Order Quantum Control Breakthrough
Overview
In May 2026, Oxford physicists achieved the first-ever experimental demonstration of quadsqueezing, realizing a fourth-order quantum interaction within a single trapped ion. This breakthrough brings a long-theorized effect into experimental reality, building on a 2021 proposal and marking a major advance in our ability to control and engineer complex quantum states. By introducing a fundamentally new type of interaction, quadsqueezing pushes the boundaries of quantum control and allows researchers to explore quantum physics in uncharted territory, opening up new possibilities for future quantum technologies.