University of Pennsylvania Demonstrates Single-Gate Parallel Entanglement on Room-Temperature Diamond Quantum Register
University of Pennsylvania researchers generated a four-qubit Greenberger-Horne-Zeilinger state in a room-temperature diamond quantum register using a single parallel gate. The state was completed in 14.8 microseconds, about ten times faster than sequential approaches, with improved fidelity.
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What this could mean
- 0–2 yearsPlausible
This single-gate parallel approach could enable room-temperature diamond registers to prepare larger multipartite entangled states, such as six to eight qubits, quickly enough for practical quantum repeater or sensing demonstrations within two years.
NV centers already combine room-temperature operation with long nuclear spin coherence. Reducing GHZ preparation to 14.8 microseconds and improving fidelity lowers decoherence exposure, so extending the same parallel gate to a few additional nuclear spins is an engineering step rather than a new physics requirement.
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