A new definition of quantum computer energy efficiency is introduced and applied to five major qubit platforms, yielding concrete consumption estimates for current systems and a benchmarking framework for future architectures.
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A coherent energy deficit in two-qubit states equals the square concurrence, establishing an energetic bound on entanglement that splits into quantum and classical parts for mixed states.
High-dimensional encoding in entanglement-based QKD achieves optimal efficiency at finite photon pair production rates, boosting secret key rates by up to ten times compared to single-qubit approaches in low-signal satellite scenarios.
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Energy efficiency of quantum computers
A new definition of quantum computer energy efficiency is introduced and applied to five major qubit platforms, yielding concrete consumption estimates for current systems and a benchmarking framework for future architectures.
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An Energetic Constraint for Qubit-Qubit Entanglement
A coherent energy deficit in two-qubit states equals the square concurrence, establishing an energetic bound on entanglement that splits into quantum and classical parts for mixed states.
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Photon Efficiency of High-Dimensional Quantum Key Distribution
High-dimensional encoding in entanglement-based QKD achieves optimal efficiency at finite photon pair production rates, boosting secret key rates by up to ten times compared to single-qubit approaches in low-signal satellite scenarios.