A general purpose architectural layout for arbitrary quantum computations

Tzvetan S. Metodi; Darshan Thaker; Andrew W. Cross; Frederic T. Chong; Isaac L. Chuang

doi:10.1117/12.604077

25 May 2005 A general purpose architectural layout for arbitrary quantum computations

Tzvetan S. Metodi, Darshan Thaker, Andrew W. Cross, Frederic T. Chong, Isaac L. Chuang

Proceedings Volume 5815, Quantum Information and Computation III; (2005) https://doi.org/10.1117/12.604077
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

Exploiting recent advances in quantum trapped-ion technologies, we propose a scalable, fault-tolerant quantum computing architecture that overcomes the fundamental challenges of building a full-scale quantum computer and leaves the fabrication a daunting but primarily an engineering concern. Using a hierarchical array-based design and a quantum teleportation communication protocol, we are able to overcome the primary scalability challenges of reliability, communication, and quantum resource distribution. In particular, we present a reconfigurable quantum circuit substrate, or "quantum FPGA'' (qFPGA) which allows efficient implementation of universal quantum gates and error correction. We use this qFPGA as a basic building block for an array structure that scalably provides communication channels and quantum resource distribution. We exploit a hierarchical combination of ballistic transport of data ions and quantum teleportation to reduce the cost of reliable communication from exponential to polynomial in distance. By using a set of simulation tools we are able to evaluate a hypothetical design of a future general purpose quantum computer and describe the execution of a fault-tolerant Toffoli gate construction. Without considering classical control constraints and assuming best-possible ion-trap parameters our computer consists of level 2 encoded qubits with the Steane \ecc code tightly connected by the teleportation interconnect, and capable of executing a fault-tolerant Toffoli gate in roughly 2.3 seconds. This translates to factoring a 128-bit number in slightly over 40 hours in circuits dominated by Toffoli gates.

Citation Download Citation

Tzvetan S. Metodi, Darshan Thaker, Andrew W. Cross, Frederic T. Chong, and Isaac L. Chuang "A general purpose architectural layout for arbitrary quantum computations", Proc. SPIE 5815, Quantum Information and Computation III, (25 May 2005); https://doi.org/10.1117/12.604077

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