Hybrid quantum computing with ancillas

Abstract

In the quest to build a practical quantum computer, it is important to use efficient schemes for enacting the elementary quantum operations from which quantum computer programs are constructed. The opposing requirements of well-protected quantum data and fast quantum operations must be balanced to maintain the integrity of the quantum information throughout the computation. One important approach to quantum operations is to use an extra quantum system - an ancilla - to interact with the quantum data register. Ancillas can mediate interactions between separated quantum registers, and by using fresh ancillas for each quantum operation, data integrity can be preserved for longer. This review provides an overview of the basic concepts of the gate model quantum computer architecture, including the different possible forms of information encodings - from base two up to continuous variables - and a more detailed description of how the main types of ancilla-mediated quantum operations provide efficient quantum gates.

arXiv commentReview paper. An introduction to quantum computation with qudits and continuous variables, and a review of ancilla-based gate methods

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Cited by in corpus (5)

• Protecting quantum memories using coherent parity check codes
• Ancilla-driven quantum computation for qudits and continuous variables
• Grover's Algorithm and Many-Valued Quantum Logic
• Unifying Sørensen-Mølmer gate and Milburn gate with an optomechanical example
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