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Time-independent quantum circuits with local interactions

Seifnashri, S ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevA.93.062342
  3. Publisher: American Physical Society , 2016
  4. Abstract:
  5. Heisenberg spin chains can act as quantum wires transferring quantum states either perfectly or with high fidelity. Gaussian packets of excitations passing through dual rails can encode the two states of a logical qubit, depending on which rail is empty and which rail is carrying the packet. With extra interactions in one or between different chains, one can introduce interaction zones in arrays of such chains, where specific one- or two-qubit gates act on any qubit which passes through these interaction zones. Therefore, universal quantum computation is made possible in a static way where no external control is needed. This scheme will then pave the way for a scalable way of quantum computation where specific hardware can be connected to make large quantum circuits. Our scheme is an improvement of a recent scheme where we borrowed an idea from quantum electrodynamics to replace nonlocal interactions between spin chains with local interactions mediated by an ancillary chain
  6. Keywords:
  8. Source: Physical Review A - Atomic, Molecular, and Optical Physics ; Volume 93, Issue 6 , 2016 ; 10502947 (ISSN)
  9. URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.062342