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Physicists develop new protocol for building photonic graph states
Phys.org Quantum Section
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⚡ Quantum Brief
University of Illinois Urbana-Champaign researchers unveiled a breakthrough "emit-then-add" protocol to generate photonic graph states, overcoming longstanding challenges in creating highly entangled multi-photon systems for quantum applications.
The new method leverages existing hardware, making it immediately viable for labs without requiring specialized equipment or extreme conditions, unlike previous approaches.
Published in npj Quantum Information, the protocol enables scalable production of entangled photon states, a critical resource for measurement-based quantum computing and advanced quantum networks.
Photonic graph states—key for fault-tolerant quantum processing—have been theoretically promising but practically elusive due to technical hurdles in entanglement generation and stabilization.
This advancement could accelerate quantum communication, sensing, and computing by providing a reliable, hardware-compatible pathway to complex entangled states.
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Physicists have long recognized the value of photonic graph states in quantum information processing. However, the difficulty of making these graph states has left this value largely untapped. In a step forward for the field, researchers from The Grainger College of Engineering at the University of Illinois Urbana-Champaign have proposed a new scheme they term "emit-then-add" for producing highly entangled states of many photons that can work with current hardware. Published in npj Quantum Information, their strategy lays the groundwork for a wide range of quantum enhanced operations including measurement-based quantum computing.
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Source: Phys.org Quantum Section