The groundbreaking research, published in Nature Physics, demonstrates the creation of a "Schrödinger's cat" state within a silicon chip, marking a significant advancement in quantum computing[1][2]. This achievement by UNSW engineers offers a novel and more robust approach to performing quantum computations, with crucial implications for error correction - a major hurdle in developing functional quantum computers[2][3]. The team utilized an antimony atom embedded in a silicon quantum chip to generate a quantum state with eight distinct spin directions, surpassing conventional qubits that only possess two states (up and down)[4]. This system provides six intermediate states between 0 and 1, resulting in a more resilient quantum architecture[5]. The implementation involves a coherent multi-frequency control scheme for spin rotations, preservation of SU(2) symmetry of the qudit, and logical Pauli operations encoded in Schrödinger cat states[6].
https://phys.org/news/2025-01-quantum-schrdinger-cat-silicon-chip.html
in the antimony atom that has eight different spin directions, if the '0' is encoded as a '"dead cat," and the "1" as an "alive cat," a single error is not enough to scramble the quantum code.
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