More Problems with Quantum Computing

  • Mikhail I. Dyakonov
Part of the SpringerBriefs in Physics book series (SpringerBriefs in Physics)


In theory, so long as there is no noise and no gates are applied, an arbitrary state of N qubits remains intact. This is true only if the energies of all qubits are exactly equal, which is hadrly possible. Otherwise, there will be a free evolution of the system defined by its energy spectrum. Also it is still not possible to factor the number 15 by Shor’s algorithm, and error correction is still non-existant.


Energy Undesired free evolution Quantum computer as non-linear system Quantum amplitudes Threshold theorem Classical limit of quantum computer Precision of quantum gates Storing a qubit in memory Quantum computing the identity 1 = 1 

Copyright information

© The Author(s), under exclusive license to Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Mikhail I. Dyakonov
    • 1
  1. 1.Laboratoire Charles CoulombUniversité de MontpellierMontpellierFrance

Personalised recommendations