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Researchers have demonstrated a novel method using eight qubits to reliably generate large Fock states by combining quantum nondemolition encoding with amplitude amplification. This approach overcomes previous limitations of low success rates and complex control systems, enabling the precise manipulation of numerous photons without disturbance. The advancement is a significant step toward practical applications in advanced quantum sensing and computation that require specific photon number states.

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Researchers Build Route to Large Quantum States with High Chance

Quantum ZeitgeistAugust 24, 20264 min read

Preparing hundreds of photons in precisely the same quantum state was previously limited by either complex control or vanishingly small success rates. Now, utilising just eight qubits, this work demonstrates a pathway towards reliably creating these large ‘Fock’ states, a key step for advanced quantum technologies. This method transfers photon information without disturbing it, paving the way for more powerful computing and sensing applications.

A new method for creating large Fock states offers sharply improved probability for use in quantum technology and precise measurements. Combining quantum nondemolition photon-number encoding alongside quantum amplitude amplification allows transfer of information about the number of photons into a multi-qubit system without disturbing the light itself. The technique creates substantial quantities of photons, particles of light, in a specific quantum state, overcoming limitations found in current methods.…

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