Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
28,188
This Month
0
Today
0
Research Volume
13,351 papers in 12 months (+7% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantifying magic for multi-qubit operations
James Robert Seddon, E. Campbell·Jan 10, 2019
The development of a framework for quantifying ‘non-stabilizerness’ of quantum operations is motivated by the magic state model of fault-tolerant quantum computation and by the need to estimate classical simulation cost for noisy intermediate-scale q...
Using ZDDs in the mapping of quantum circuits
Mathias Soeken·Jan 8, 2019
A critical step in quantum compilation is the transformation of a technology-independent quantum circuit into a technology-dependent form for a targeted device. In addition to mapping quantum gates into the supported gate set, it is necessary to map ...
Fine-grained quantum computational supremacy
T. Morimae, Suguru Tamaki·Jan 7, 2019
(pp1089-1115) Tomoyuki Morimae and Suguru Tamaki doi: https://doi.org/10.26421/QIC19.13-14-2 Abstracts: Output probability distributions of several sub-universal quantum computing models cannot be classically efficiently sampled unless some unlikely ...
A machine learning approach for automated fine-tuning of semiconductor spin qubits
J. Teske, S. Humpohl, R. Otten +6 more·Jan 7, 2019
While spin qubits based on gate-defined quantum dots have demonstrated very favorable properties for quantum computing, one remaining hurdle is the need to tune each of them into a good operating regime by adjusting the voltages applied to electrosta...
Feasibility of single-shot realizations of conditional three-qubit gates in exchange-coupled qubit arrays with local control
V. Stojanović·Jan 4, 2019
We investigate the feasibility of single-shot Toffoli- and Fredkin-gate realizations in qubit arrays with Heisenberg-type exchange interactions between adjacent qubits. As follows from the Lie-algebraic criteria of controllability, such an array is r...
Faster quantum computation with permutations and resonant couplings
Yingkai Ouyang, Yi Shen, Lin Chen·Jan 2, 2019
Abstract Recently, there has been increasing interest in designing schemes for quantum computations that are robust against errors. Although considerable research has been devoted to quantum error correction schemes, much less attention has been paid...
Circuit optimization for IBM processors: A way to get higher fidelity and higher values of nonclassicality witnesses
M. Sisodia, A. Shukla, Alexandre A. A. de Almeida +2 more·Dec 30, 2018
Recently, various quantum computing and communication tasks have been implemented using IBM's superconductivity-based quantum computers which are available on the cloud. Here, we show that the circuits used in most of those works were not optimized a...
Reconfigurable quantum logic gates using Rashba controlled spin polarized currents
G. A. Nemnes, D. Dragoman·Dec 15, 2018
Abstract A reconfigurable logic gate is proposed in a two-dimensional double quantum wire system with a coupling window enabled by a Rashba field. Manipulating the spin states of incoming electrons several quantum logic gates (OR, AND, XOR, CNOT) can...
Teleportation-based quantum homomorphic encryption scheme with quasi-compactness and perfect security
Min Liang·Dec 14, 2018
Quantum homomorphic encryption (QHE) is an important cryptographic technology for delegated quantum computation. It enables remote server to perform quantum computation on encrypted data, and the specific algorithm performed by Server is unnecessaril...
Stochastic estimation of dynamical variables
Stefan Krastanov, Sisi Zhou, S. Flammia +1 more·Dec 12, 2018
Estimating the parameters governing the dynamics of a system is a prerequisite for its optimal control. We present a simple but powerful method that we call STEADY, for STochastic Estimation algorithm for DYnamical variables, to estimate the Hamilton...
Digital-analog quantum computation
Adrian Parra-Rodriguez, P. Lougovski, L. Lamata +2 more·Dec 10, 2018
Digital quantum computing paradigm offers highly-desirable features such as universality, scalability, and quantum error correction. However, physical resource requirements to implement useful error-corrected quantum algorithms are prohibitive in the...
Duality Quantum Computing with Subwave Projections
Fang-qi Hu, G. Long·Dec 9, 2018
Duality quantum computing (DQC) offers the use of linear combination of unitaries (LCU), or generalized quantum gates, in designing quantum algorithms. DQC contains wave divider and wave combiner operations. The wave function of a quantum computer is...
High-Threshold Code for Modular Hardware With Asymmetric Noise
Xiaosi Xu, Qi Zhao, Xiao Yuan +1 more·Dec 4, 2018
We consider an approach to fault tolerant quantum computing based on a simple error detecting code operating as the substrate for a conventional surface code. We develop a customised decoder to process the information about the likely location of err...
Trading T gates for dirty qubits in state preparation and unitary synthesis
G. Low, V. Kliuchnikov, L. Schaeffer·Dec 3, 2018
Efficient synthesis of arbitrary quantum states and unitaries from a universal fault-tolerant gate-set e.g. Clifford+T is a key subroutine in quantum computation. As large quantum algorithms feature many qubits that encode coherent quantum informatio...
Vector Generation of Quantum Contextual Sets in Even Dimensional Hilbert Spaces
M. Pavičić, N. Megill·Dec 1, 2018
Recently, quantum contextuality has been proved to be the source of quantum computation’s power. That, together with multiple recent contextual experiments, prompts improving the methods of generation of contextual sets and finding their features. Th...
Nanomechanical single-photon routing
C. Papon, Xiaoyan Zhou, H. Thyrrestrup +7 more·Nov 27, 2018
The active routing of photons using rapid reconfigurable integrated circuits is a key functionality for quantum-information processing. Typical waveguide-based optical switches rely on the modulation of the refractive index, producing a modest variat...
Exact gate decompositions for photonic quantum computing
Timjan Kalajdzievski, J. Arrazola·Nov 26, 2018
We propose a method for decomposing continuous-variable operations into a universal gate set, without the use of any approximations. We fully characterize a set of transformations admitting exact decompositions and describe a process for obtaining th...
Consequences of unitary evolution of coupled qubit-resonator systems for stabilizing circuits in surface codes
H. Naus, R. Versluis·Nov 24, 2018
Surface codes based on stabilizer circuits may pave the way for large scale fault-tolerant quantum computation. The surface code uses only single- and two-qubit gates and the error threshold falls close to 1% for a large range of errors. Among the mo...
Accrediting outputs of noisy intermediate-scale quantum computing devices
Samuele Ferracin, Theodoros Kapourniotis, A. Datta·Nov 24, 2018
We present an accreditation protocol for the outputs of noisy intermediate-scale quantum devices. By testing entire circuits rather than individual gates, our accreditation protocol can provide an upper-bound on the variation distance between noisy a...
Scalable Realization of Surface Code Quantum Memory by Applying Multi-Qubit Parity Detector Gates
Sahar Daraeizadeh, S. Mostame, Preethika Kumar Eslami +2 more·Nov 22, 2018
We analytically designed the control bias pulses to realize new multi-qubit parity detector gates for 2-Dimensional (2D) array of superconducting flux qubits with non-tunable couplings. We designed two 5-qubit gates such that the middle qubit is the ...