Energy-Efficient Quantum Computing

Joni Ikonen, Juha Salmilehto, Mikko Möttönen

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)
154 Downloads (Pure)


In the near future, one of the major challenges in the realization of large-scale quantum computers operating at low temperatures is the management of harmful heat loads owing to thermal conduction of cabling and dissipation at cryogenic components. This naturally raises the question that what are the fundamental limitations of energy consumption in scalable quantum computing. In this work, we derive the greatest lower bound for the gate error induced by a single application of a bosonic drive mode of given energy.
Previously, such an error type has been considered to be inversely proportional to the total driving power, but we show that this limitation can be circumvented by introducing a qubit driving scheme which reuses and corrects drive pulses. Specifically, our method serves to reduce the average energy consumption per gate operation without increasing the average gate error. Thus our work shows that precise, scalable control of quantum systems can, in principle, be implemented without the introduction of excessive heat or decoherence.
Original languageEnglish
Article number0015
Pages (from-to)1-7
Journalnpj Quantum Information
Issue number1
Publication statusPublished - 14 Apr 2017
MoE publication typeA1 Journal article-refereed


  • Qubit
  • Quantum gates
  • Entanglement


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