Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Learning Algorithms and Post-Quantum Cryptography
Alexander Poremba·Dec 26, 2017
Quantum algorithms have demonstrated promising speed-ups over classical algorithms in the context of computational learning theory - despite the presence of noise. In this work, we give an overview of recent quantum speed-ups, revisit the Bernstein-V...
Thin film metrology and microwave loss characterization of indium and aluminum/indium superconducting planar resonators
C. H. McRae, Jérémy H. Béjanin, C. T. Earnest +6 more·Dec 23, 2017
Scalable architectures characterized by quantum bits (qubits) with low error rates are essential to the development of a practical quantum computer. In the superconducting quantum computing implementation, understanding and minimizing materials losse...
Deterministic quantum state transfer and remote entanglement using microwave photons
P. Kurpiers, P. Magnard, T. Walter +10 more·Dec 22, 2017
Sharing information coherently between nodes of a quantum network is fundamental to distributed quantum information processing. In this scheme, the computation is divided into subroutines and performed on several smaller quantum registers that are co...
Quantum nondemolition gate operations and measurements in real time on fluctuating signals
Y. Shiozawa, J. Yoshikawa, S. Yokoyama +10 more·Dec 22, 2017
We demonstrate an optical quantum nondemolition (QND) interaction gate with a bandwidth of about 100 MHz. Employing this gate, we are able to perform QND measurements in real time on randomly fluctuating signals. Our QND gate relies on linear optics ...
Entanglement sharing via qudit channels: Nonmaximally entangled states may be necessary for one-shot optimal singlet fraction and negativity
Rajarshi Pal, Somshubhro Bandyopadhyay·Dec 22, 2017
We consider the problem of establishing entangled states of optimal singlet fraction and negativity between two remote parties for every use of a noisy quantum channel and trace-preserving LOCC under the assumption that the parties do not share prior...
Realization of t-bit semiclassical quantum Fourier transform on IBM’s quantum cloud computer
Xiang-Qun 向群 Fu 付, W. Bao 鲍, H. Huang 黄 +5 more·Dec 22, 2017
To overcome the difficulty of realizing large-scale quantum Fourier transform (QFT) within existing technology, this paper implements a resource-saving method (named t-bit semiclassical QFT over Z 2 n ), which could realize large-scale QFT using an a...
Golden codes: quantum LDPC codes from regular tessellations of hyperbolic 4-manifolds
V. Londe, Anthony Leverrier·Dec 22, 2017
We adapt a construction of Guth and Lubotzky \cite{GL14} to obtain a family of quantum LDPC codes with non-vanishing rate and minimum distance scaling like n^{0.1} where n is the number of physical qubits. Similarly as in Ref.~\cite{GL14}, our homolo...
T-count and Qubit Optimized Quantum Circuit Design of the Non-Restoring Square Root Algorithm
Edgard Muñoz-Coreas, H. Thapliyal·Dec 21, 2017
Quantum circuits for basic mathematical functions such as the square root are required to implement scientific computing algorithms on quantum computers. Quantum circuits that are based on Clifford+T gates can easily be made fault tolerant, but the T...
Simple Impedance Response Formulas for the Dispersive Interaction Rates in the Effective Hamiltonians of Low Anharmonicity Superconducting Qubits
Firat Solgun, D. DiVincenzo, J. Gambetta·Dec 21, 2017
For superconducting quantum processors consisting of low anharmonicity qubits such as transmons, we give a complete microwave description of the system in the qubit subspace. We assume that the qubits are dispersively coupled to a distributed microwa...
Blind quantum computation for quantum Fourier transform on Bell states
Xiaoqian Zhang, Jian Weng, Qingqing Gan +3 more·Dec 21, 2017
It is called blind quantum computation(BQC) that a client who has limited quantum technologies can delegate her quantum computing to a server who has fully-advanced quantum computers. But the privacy of the client's quantum inputs, algorithms and out...
Optimising Matrix Product State Simulations of Shor's Algorithm
Aidan Dang, C. Hill, L. Hollenberg·Dec 20, 2017
We detail techniques to optimise high-level classical simulations of Shor's quantum factoring algorithm. Chief among these is to examine the entangling properties of the circuit and to effectively map it across the one-dimensional structure of a matr...
Deterministic delivery of remote entanglement on a quantum network
P. Humphreys, N. Kalb, Jaco P. J. Morits +5 more·Dec 20, 2017
Large-scale quantum networks promise to enable secure communication, distributed quantum computing, enhanced sensing and fundamental tests of quantum mechanics through the distribution of entanglement across nodes1–7. Moving beyond current two-node n...
Quantum error correction in crossbar architectures
J. Helsen, M. Steudtner, M. Veldhorst +1 more·Dec 20, 2017
A central challenge for the scaling of quantum computing systems is the need to control all qubits in the system without a large overhead. A solution for this problem in classical computing comes in the form of so-called crossbar architectures. Recen...
Room Temperature High-fidelity Non-adiabatic Holonomic Quantum Computation on Solid-state Spins in Nitrogen-vacancy Centers
Guo-an Yan, Hua Lu·Dec 20, 2017
The high-speed implementation and robustness against of non-adiabatic holonomic quantum computation provide a new idea for overcoming the difficulty of the quantum system interacting with the environment easily decoherence, which realizing large-scal...
Cluster state generation in one-dimensional Kitaev honeycomb model via shortcut to adiabaticity
T. Kyaw, L. Kwek·Dec 19, 2017
We propose a mean to obtain computationally useful resource states also known as cluster states, for measurement-based quantum computation, via transitionless quantum driving algorithm. The idea is to cool the system to its unique ground state and tu...
Pattern recognition techniques for Boson Sampling validation
I. Agresti, Niko Viggianiello, Fulvio Flamini +5 more·Dec 19, 2017
The difficulty of validating large-scale quantum devices, such as Boson Samplers, poses a major challenge for any research program that aims to show quantum advantages over classical hardware. To address this problem, we propose a novel data-driven a...
Quantum Algorithms for Boolean Equation Solving and Quantum Algebraic Attack on Cryptosystems
Yu-Ao Chen, X. Gao·Dec 18, 2017
Decision of whether a Boolean equation system has a solution is an NPC problem and finding a solution is NP hard. In this paper, we present a quantum algorithm to decide whether a Boolean equation system FS has a solution and compute one if FS does h...
Harnessing electro-optic correlations in an efficient mechanical converter
A. Higginbotham, P. S. Burns, M. Urmey +6 more·Dec 18, 2017
An optical network of superconducting quantum bits (qubits) is an appealing platform for quantum communication and distributed quantum computing, but developing a quantum-compatible link between the microwave and optical domains remains an outstandin...
Chip-to-chip entanglement of transmon qubits using engineered measurement fields
C. Dickel, J. Wesdorp, N. Langford +6 more·Dec 17, 2017
While the on-chip processing power in circuit QED devices is growing rapidly, an open challenge is to establish high-fidelity quantum links between qubits on different chips. Here, we show entanglement between transmon qubits on different cQED chips ...
Reducing spontaneous Raman scattering noise in high quantum bit rate QKD systems over optical fiber
M. Mlejnek, N. Kaliteevskiy, D. Nolan·Dec 16, 2017
We investigate (a) spontaneous Raman scattering of classical signals in long optical fiber links leading to significant Raman noise in quantum channels propagating in the same fiber and (b) impact of chromatic dispersion on the performance of high qu...