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Quantum computers go high-dimensional with a four-state photon gate - Phys.org

Google News – Quantum Computing
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Researchers achieved a breakthrough by demonstrating a four-state quantum logic gate using high-dimensional photons, enabling qudits (multi-level quantum bits) instead of traditional qubits. This advance could exponentially increase quantum computing power. The experiment, published in February 2026, marks the first successful implementation of a universal gate for qudits in photonic systems, overcoming decoherence challenges that limit qubit-based architectures. By encoding information in a photon’s orbital angular momentum, the team created a gate operating on four distinct quantum states, doubling the computational capacity per particle compared to binary qubits. This development accelerates progress toward fault-tolerant quantum computers, as qudits reduce error rates and hardware complexity by consolidating more information into fewer physical components. The innovation paves the way for scalable, high-dimensional quantum networks, potentially revolutionizing cryptography, optimization, and simulations in fields like material science and drug discovery.
Quantum computers go high-dimensional with a four-state photon gate - Phys.org

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Source: Google News – Quantum Computing