Oxford physicists create new type of quantum superposition state
6 reported
Researchers at the University of Oxford have demonstrated a new family of quantum superpositions, building on the concept of Schrödinger's cat. Unlike previous versions, these states are constructed from highly nonclassical quantum components. The experiment used the motion of a single trapped ion, combining its internal qubit-like state with a quantum harmonic oscillator. By engineering interactions and performing a mid-circuit measurement, the team produced superpositions of nonclassical motional states. The method gave them programmable control over the size, orientation, and separation of the components. Measurements confirmed genuine quantum superpositions through interference patterns and Wigner negativity. The research, published in Physical Review X, could lead to more error-resistant quantum computers and new insights into the boundary between classical and quantum physics.
What’s reported
Oxford physicists created a new type of quantum superposition using nonclassical components.
The experiment used a single trapped ion, combining its internal state (like a qubit) with its motion (a quantum harmonic oscillator).
The team engineered interactions and performed a mid-circuit measurement to produce the desired superposition.
The method allowed programmable control over the relative size, orientation, and separation of components.
Measurements showed interference patterns and Wigner negativity, confirming genuine quantum superpositions.
The research was published in Physical Review X on June 15, 2026.
Key figures
Dr. Sebastian Saner (lead author, Department of Physics, University of Oxford)
Dr. Raghavendra Srinivas (supervisor, Department of Physics, University of Oxford)
Sources: ScienceDaily
