Critical Schrödinger Cat Code: Quantum Computing Breakthrough for Better Qubits — Scientists from EPFL have |
An illustration of Schrödinger’s cat code. In a significant quantum computing breakthrough, physicists from EPFL have proposed a “critical Schrödinger cat code” for advanced resilience to errors, an encoding scheme inspired by Schrödinger’s thought experiment.
“With applications ranging from drug discovery to optimization and simulations of complex biological systems and materials, quantum computing has the potential to reshape vast areas of science, industry, and society,” says Professor Vincenzo Savona, director of the Center for Quantum Science and Engineering atUnlike classical bits, qubits can exist in a “superposition” of both 0 and 1 states at the same time.
According to the Copenhagen view of quantum mechanics, if the atom is initially in superposition, the cat will inherit the same state and find itself in a superposition of alive and dead. “This state represents exactly the notion of a quantum bit, realized at the macroscopic scale,” says Savona. “Schrödinger cat codes have been realized in the past using two distinct approaches,” explains Savona. “One leverages anharmonic effects in the cavity, the other relying on carefully engineered cavity losses. In our work, we bridged the two by operating in an intermediate regime, combining the best of both worlds. Although previously believed to be unfruitful, this hybrid regime results in enhanced error suppression capabilities.
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