The new invention introduces connections created by electric fields that allow charged atoms (ions) to be transported from one module to another. The Dark Triad and Insider Threats in Cyber Security, A Blueprint For Building a Quantum Computer, http://www.iarpa.gov/solicitations.qcs.html, Sidebar: Approaches to Quantum Information Processing, VR Software Allows Scientists to 'Walk' Inside Cells, The Field of Natural Language Processing is Chasing the Wrong Goal, Here's Why Resentment is the Key to Happiness, Establish a substantially post-classical goal of factoring an. Yao, X.-C. et al. Maslov, D., Falconer, S. and Mosca, M. Quantum Circuit Placement. Rev. All rights reserved. Performing error correction is not a simple task; in fact, the vast majority of the processing power of a universal quantum computer will be used to correct errors in the quantum state. In part to address some of these architectural limitations, the QuDOS architecture was developed.16 QuDOS, if built, would be 100 times faster, largely due to increased parallelism in measuring the error syndromes. Experimental demonstration of topological error correction. Even within individual chips, we are already seeing the beginning of designs with multiple types of interconnects. We note that the process of writing this article has been made substantially easier by the appearance in the last few years of excellent reviews on many architecture-relevant subfields.1,3,4,9,13,19,28. For flux qubits, the state variable is the quantum state of the magnetic flux generated by a micron-scale ring of current in a loop of superconducting wire (Figure 3). In this article, we discuss the elements of this structure in turn, all leading to the central core of quantum computer architecture. Implementation of Shor's algorithm on a linear nearest neighbor qubit array. Devitt, S.J., Nemoto, K. and Munro, W.J. Each element in the superposition has a (complex) weight, say for 0 and for 1. Architects have suggested a physical machine comprised of high millions to billions of qubits to factor a 2,048-bit number, a size that experimental physicists find staggering.7,16,26,36. There are three main areas where experimental groups have begun to consider architectural implications in designing their systems. Many groups worldwide are currently working with a range of state variables, from the direction of quantum spin of an electron, atom, nucleus, or quantum dot, through the magnetic flux of a micron-scale current loop, to the state of a photon or photon group (its polarization, position or timing). At the bottom of the stack we have the technologies for storing individual qubits, and processing or transporting them to take part in a larger computation. Nature 482 (Feb. 2012), 489494. 's 2002 proposal for an ion trap that can shuffle and manipulate individual atoms,17 an approach that continues to pay dividends. Researchers from around the world, including a team from Google, have unveiled what they say is the first practical blueprint for the 'holy grail' of computing - a quantum computer. Here’s a Blueprint In most quantum error correction paradigms, direct execution of a Toffoli gate on encoded logical qubits is not possible. Figure 1. 22. report. Clark, C.R., Metodi, T.S., Gasster, S.D. When selecting a quantum code, the rate is important, but the demands made on the implementing hardware and the ease of logical operations are critical. Running a quantum circuit at the speed of data. 7. and Brown, K.R. Reports on Progress in Physics 76, 8 (Aug. 2013). Like a classical bit, a qubit has two states 0 and 1 but, unlike a classical bit, a qubit may be in a superposition of the two states, being in a certain sense in both 0 and 1 at the same time. Want to Build a Quantum Computer? However, its size will be anything but small. Developing a sense of community is critical. International Journal of Quantum Information 8 (2010), 295323. Beckman, D., Chari, A.N., Devabhaktuni, S. and Preskill, J. The Josephson junction superconducting flux qubit. The possibility of performing quantum computation is saved, however, by quantum error correction. Shor's algorithm for L = 2,048 demands that, roughly speaking, we must be able to run 1015 logical operations with a high probability of correctly executing them all. Vedral, V., Barenco, A. and Ekert, A. Quantum networks for elementary arithmetic operations. In these chips, the smallest features will be only about 40 times the silicon crystal lattice cell size. To sharpen the community focus on building systems, it seems to be time to begin demanding Moore's Law-like improvements in system capacity. In some such cases, when the superposition contains more than a single qubit, the qubits can be entangled with each other. Blueprint for large scale supercomputer could open the road for billion-qubit machine, and the secrets of the universe with it Quantum computers today are ineffective but this is set to change. In contrast, although the atoms themselves are of course tiny, ion traps are limited to inter-atom spacing of perhaps tens of microns for RF and optical control. Coherent dynamics of coupled electron and nuclear spin qubits in diamond. 18. Raussendorf, R., Harrington, J. and Goyal, K. Topological fault-tolerance in cluster state quantum computation. The size, number, and position of the singular factories is dependent on the physical error rate and the size of the computation to be performed, and the type of interconnects available.