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Schrödinger’s cat states appear in the nuclear spin state of antimony
- Physicists at UNSW have achieved creating Schrödinger's cat state in a single, large nuclear spin, with applications in quantum information processing.
- The concept of Schrödinger's cat state stems from a thought experiment by Erwin Schrödinger involving simultaneous alive and dead states of a cat.
- Creating cat states in laboratories is challenging, previously done using laser fields, trapped ions, and superconducting systems.
- The UNSW study introduces a cat state in an antimony atom with a high nuclear spin capable of eight different spin directions.
- The antimony atom's quantum system provides error-correctable logical qubits due to its high-dimensional nature.
- By using the antimony atom, quantum information is better protected against errors as it requires multiple consecutive errors to lose data.
- The research team initially focused on observing quantum chaos in high-spin nuclei before exploring quantum information applications.
- The team synchronized seven clocks to track the quantum state of the eight-level system, facilitated by FPGA generators designed for quantum applications.
- Hosting the cat state in a silicon chip presents scalability opportunities for quantum processors containing millions of such states.
- Future plans include demonstrating quantum error correction in the antimony system and integrating it with lithographic quantum dots.
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