Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Observation of ten-photon entanglement using thin BiB 3 O 6 crystals
Luo-Kan Chen, Zheng-da Li, Xing-Can Yao +13 more·Sep 1, 2016
Coherently manipulating a number of entangled qubits is the key task of quantum information processing. In this paper, we report on the experimental realization of a ten-photon Greenberger–Horne–Zeilinger state using thin BiB3O6 crystals. The observe...
Quantum protocols within Spekkens' toy model
Leonardo Disilvestro, D. Markham·Aug 31, 2016
Quantum mechanics is known to provide significant improvements in information processing tasks when compared to classical models. These advantages range from computational speeds-up to security improvements. A key question is where these advantages c...
High-Threshold Low-Overhead Fault-Tolerant Classical Computation and the Replacement of Measurements with Unitary Quantum Gates.
Benjamin Cruikshank, K. Jacobs·Aug 29, 2016
von Neumann's classic "multiplexing" method is unique in achieving high-threshold fault-tolerant classical computation (FTCC), but has several significant barriers to implementation: (i) the extremely complex circuits required by randomized connectio...
Quantum dynamics of simultaneously measured non-commuting observables
S. Hacohen-Gourgy, Leigh S. Martin, E. Flurin +3 more·Aug 23, 2016
In quantum mechanics, measurements cause wavefunction collapse that yields precise outcomes, whereas for non-commuting observables such as position and momentum Heisenberg’s uncertainty principle limits the intrinsic precision of a state. Although th...
Exploring Quantum Teleportation through Unitary Error Bases
Benjamin Musto·Aug 16, 2016
Unitary error bases have a great number of applications across quantum information and quantum computation, and are fundamentally linked to quantum teleportation, dense coding and quantum error correction. Werner's combinatorial construction builds a...
High-fidelity entangling gate for double-quantum-dot spin qubits
J. Nichol, L. Orona, S. Harvey +4 more·Aug 15, 2016
Electron spins in semiconductors are promising qubits because their long coherence times enable nearly 109 coherent quantum gate operations. However, developing a scalable high-fidelity two-qubit gate remains challenging. Here, we demonstrate an enta...
Hyper-parallel Toffoli gate on three-photon system with two degrees of freedom assisted by single-sided optical microcavities.
Hai‐Rui Wei, Fuguo Deng, G. Long·Aug 8, 2016
Encoding qubits in multiple degrees of freedom (DOFs) of a quantum system allows less-decoherence quantum information processing with much less quantum resources. We present a compact and scalable quantum circuit to determinately implement a hyper-pa...
Multipartite Entanglement in Stabilizer Tensor Networks.
Sepehr Nezami, M. Walter·Aug 8, 2016
Despite the fundamental importance of quantum entanglement in many-body systems, our understanding is mostly limited to bipartite situations. Indeed, even defining appropriate notions of multipartite entanglement is a significant challenge for genera...
Observation of Majorization Principle for quantum algorithms via 3-D integrated photonic circuits
Fulvio Flamini, Niko Viggianiello, Taira Giordani +7 more·Aug 3, 2016
The Majorization Principle is a fundamental statement governing the dynamics of information processing in optimal and efficient quantum algorithms. While quantum computation can be modeled to be reversible, due to the unitary evolution undergone by t...
Multiple-output microwave single-photon source using superconducting circuits with longitudinal and transverse couplings
X. Wang, A. Miranowicz, Hong-rong Li +1 more·Jul 29, 2016
Single-photon devices at microwave frequencies are important for applications in quantum information processing and communication in the microwave regime. In this work we describe a proposal of a multioutput single-photon device. We consider two supe...
Multifunctional all-dielectric nano-optical systems using collective multipole Mie resonances: toward on-chip integrated nanophotonics
Swarnabha Chattaraj, A. Madhukar·Jul 29, 2016
We present an analysis of the optical response of a class of on-chip integrated nanophotonic systems comprising all-dielectric building-block-based multifunctional light manipulating units (LMU) integrated with quantum dot (QD) light sources. Multipl...
Observation of topological Uhlmann phases with superconducting qubits
O. Viyuela, O. Viyuela, O. Viyuela +5 more·Jul 29, 2016
Topological insulators and superconductors at finite temperature can be characterized by the topological Uhlmann phase. However, a direct experimental measurement of this invariant has remained elusive in condensed matter systems. Here, we report a m...
Modular Quantum Information Processing by Dissipation
Jeffrey Marshall, L. Venuti, P. Zanardi·Jul 12, 2016
Dissipation can be used as a resource to control and simulate quantum systems. We discuss a modular model based on fast dissipation capable of performing universal quantum computation, and simulating arbitrary Lindbladian dynamics. The model consists...
Fault-Tolerant Quantum Error Correction for non-Abelian Anyons
G. Dauphinais, D. Poulin·Jul 7, 2016
While topological quantum computation is intrinsically fault-tolerant at zero temperature, it loses its topological protection at any finite temperature. We present a scheme to protect the information stored in a system supporting non-cyclic anyons a...
Experimental Quantum Randomness Processing Using Superconducting Qubits.
Xiao Yuan, Ke Liu, Yuan Xu +7 more·Jun 29, 2016
Coherently manipulating multipartite quantum correlations leads to remarkable advantages in quantum information processing. A fundamental question is whether such quantum advantages persist only by exploiting multipartite correlations, such as entang...
Coherence Preservation of a Single Neutral Atom Qubit Transferred between Magic-Intensity Optical Traps.
Jiaheng Yang, Xiaodong He, R. Guo +7 more·Jun 17, 2016
We demonstrate that the coherence of a single mobile atomic qubit can be well preserved during a transfer process among different optical dipole traps (ODTs). This is a prerequisite step in realizing a large-scale neutral atom quantum information pro...
Entanglement and deterministic quantum computing with one qubit
Michel Boyer, Aharon Brodutch, T. Mor·Jun 16, 2016
The role of entanglement and quantum correlations in complex physical systems and quantum information processing devices has become a topic of intense study in the past two decades. In this work we present new tools for learning about entanglement an...
Quantum-circuit refrigerator
K. Tan, M. Partanen, R. Lake +3 more·Jun 15, 2016
Quantum technology promises revolutionizing applications in information processing, communications, sensing and modelling. However, efficient on-demand cooling of the functional quantum degrees of freedom remains challenging in many solid-state imple...
A unified framework for magic state distillation and multi-qubit gate-synthesis with reduced resource cost
Earl T. Campbell, Mark Howard·Jun 6, 2016
The standard approach to fault-tolerant quantum computation is to store information in a quantum error correction code, such as the surface code, and process information using a strategy that can be summarized as distill-then-synthesize. In the disti...
Mixing Properties of Stochastic Quantum Hamiltonians
E. Onorati, O. Buerschaper, M. Kliesch +5 more·Jun 6, 2016
Random quantum processes play a central role both in the study of fundamental mixing processes in quantum mechanics related to equilibration, thermalisation and fast scrambling by black holes, as well as in quantum process design and quantum informat...