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Researchers from the University of Hong Kong have identified a precise boundary where retaining records of thermal energy exchange during idle periods enables universal quantum computation, whereas erasing them limits the system to classical simulation. This finding establishes that managing relaxation and coherence times alongside excited-state populations is critical for harnessing even modest thermal noise for fault-tolerant quantum processing. The study provides a rigorous framework for classifying quantum behaviors based on these physical parameters rather than just error rates alone.

Surse care acoperăQuantum Zeitgeist, arXiv, LessWrong, Quantum Computing Report

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Researchers Link Environmental Records to Universal Quantum Computation

Quantum Zeitgeist19 septembrie 20263 min de cititArticolul și perspectiva sunt în engleză.

A processor exposed to heat can compute universally or be entirely mimicked by a standard computer, determined solely by what information is saved about energy changes during idle periods. Retaining just confirmation of *any* energy transfer unlocks polynomial overhead universal computation; erasing this record limits processing power to classical simulation. This establishes an exact boundary, defined by relaxation and coherence times alongside excited-state population, previously lacking in classifying quantum behaviours.

Research at The University of Hong Kong and HK Institute of Quantum Science & Technology classifies computation within quantum processors. The study concentrates on energy-counting thermal-idle instruments featuring key stabiliser control together with independent local Markov baths. Stabiliser errors build up linearly with time at a fixed thermal exposure. Scientists at the University of Hong…

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