Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Unitary partitioning approach to the measurement problem in the Variational Quantum Eigensolver method.
A. Izmaylov, Tzu-Ching Yen, Robert A. Lang +1 more·Jul 21, 2019
To obtain estimates of electronic energies, the Variational Quantum Eigensolver (VQE) technique performs separate measurements for multiple parts of the system Hamiltonian. Current quantum hardware is restricted to projective single-qubit measurement...
Always-On Quantum Error Tracking with Continuous Parity Measurements
Razieh Mohseninia, Jing Yang, I. Siddiqi +2 more·Jul 20, 2019
We investigate quantum error correction using continuous parity measurements to correct bit-flip errors with the three-qubit code. Continuous monitoring of errors brings the benefit of a continuous stream of information, which facilitates passive err...
Practical trapped-ion protocols for universal qudit-based quantum computing
Pei Jiang Low, Brendan M. White, Andrew A. Cox +2 more·Jul 19, 2019
The notion of universal quantum computation can be generalized to multi-level qudits, which offer advantages in resource usage and algorithmic efficiencies. Trapped ions, which are pristine and well-controlled quantum systems, offer an ideal platform...
Mitigation of readout noise in near-term quantum devices by classical post-processing based on detector tomography
Filip B. Maciejewski, Z. Zimbor'as, Michał Oszmaniec·Jul 19, 2019
We propose a simple scheme to reduce readout errors in experiments on quantum systems with finite number of measurement outcomes. Our method relies on performing classical post-processing which is preceded by Quantum Detector Tomography, i.e., the re...
A diagrammatic approach to variational quantum ansatz construction
Y. Herasymenko, T. O’Brien·Jul 18, 2019
Variational quantum eigensolvers (VQEs) are a promising class of quantum algorithms for preparing approximate ground states in near-term quantum devices. Minimizing the error in such an approximation requires designing ansatzes using physical conside...
Implementation of a Hamming-Distance-Like Genomic Quantum Classifier Using Inner Products on IBMQX4 and IBMQX16
K. Kathuria, A. Ratan, Michael J. McConnell +1 more·Jul 18, 2019
Motivated by the problem of classifying individuals with a disease versus controls using functional genomic attributes as input, we encode the input as a string of 1s (presence) or 0s (absence) of the genomic attribute across the genome. Blocks of ph...
Counting single-qubit Clifford equivalent graph states is #P-Complete
A. Dahlberg, J. Helsen, S. Wehner·Jul 18, 2019
Graph states, which include for example Bell states, GHZ states and cluster states, form a well-known class of quantum states with applications ranging from quantum networks to error-correction. Deciding whether two graph states are equivalent up to ...
Pauli Partitioning with Respect to Gate Sets.
Andrew Jena, Scott N. Genin, M. Mosca·Jul 18, 2019
Measuring the expectation value of Pauli operators on prepared quantum states is a fundamental task in a multitude of quantum algorithms. Simultaneously measuring sets of operators allows for fewer measurements and an overall speedup of the measureme...
Simpler quantum counting
Chu-Ryang Wie·Jul 18, 2019
A simpler quantum counting algorithm based on amplitude amplification is presented. This algorithm is bounded by O(sqrt(N/M)) calls to the controlled-Grover operator where M is the number of marked states and N is the total number of states in the se...
Integrating superfluids with superconducting qubit systems
J. Lane, D. Tan, N. Beysengulov +7 more·Jul 18, 2019
Superfluid helium's low-loss dielectric properties, excellent thermal conductivity, and unique collective excitations make it an attractive candidate to incorporate into superconducting qubit systems. We controllably immerse a three-dimensional super...
Transforming graph states to Bell-pairs is NP-Complete
A. Dahlberg, J. Helsen, S. Wehner·Jul 18, 2019
Critical to the construction of large scale quantum networks, i.e. a quantum internet, is the development of fast algorithms for managing entanglement present in the network. One fundamental building block for a quantum internet is the distribution o...
Nonlinear Properties of Supercurrent-Carrying Single- and Multi-Layer Thin-Film Superconductors
Songyuan Zhao, S. Withington, D. Goldie +1 more·Jul 18, 2019
Superconducting thin films are central to the operation of many kinds of quantum sensors and quantum computing devices: kinetic inductance detectors (KIDs), travelling-wave parametric amplifiers (TWPAs), qubits, and spin-based quantum memory elements...
Finite Speed of Quantum Scrambling with Long Range Interactions.
Chi-Fang Chen, A. Lucas·Jul 17, 2019
In a locally interacting many-body system, two isolated qubits, separated by a large distance r, become correlated and entangled with each other at a time t≥r/v. This finite speed v of quantum information scrambling limits quantum information process...
Quantum channel correction with twisted light using compressive sensing
C. Mabena, F. S. Roux·Jul 17, 2019
Compressive sensing is used to perform high-dimensional quantum channel estimation with classical light. As an example, we perform a numerical simulation for the case of a three-dimensional classically non-separable state that is propagated through a...
How Does Adiabatic Quantum Computation Fit into Quantum Automata Theory?
T. Yamakami·Jul 17, 2019
Quantum computation has emerged as a powerful computational medium of our time, having demonstrated the efficiency in solving the integer factoring and searching a database faster than any currently known classical computer algorithm. Adiabatic evolu...
Query complexity of generalized Simon's problem
Zekun Ye, Yunqi Huang, Lvzhou Li +1 more·Jul 17, 2019
Simon's problem plays an important role in the history of quantum algorithms, as it inspired Shor to discover the celebrated quantum algorithm solving integer factorization in polynomial time. Besides, the quantum algorithm for Simon's problem has be...
The formation of intermediate layers in covered Ge/Si heterostructures with low-temperature quantum dots: a study using high-resolution transmission electron microscopy and Raman spectroscopy
M. S. Storozhevykh, L. V. Arapkina, S. Novikov +3 more·Jul 16, 2019
The method of software analysis of high-resolution TEM images using the peak pairs algorithm [Galindo P L et al 2007 Ultramicroscopy 107 1186–93] in combination with Raman spectroscopy was employed to study lattice deformations in Ge/Si(001) structur...
Introducing Control Flow in Qubit Allocation for Quantum Turing Machines
Michael Cubeddu, Will Finigan, Thomas Lively +2 more·Jul 16, 2019
Different platforms for quantum computation are currently being developed with a steadily increasing number of physical qubits. To make today's devices practical for quantum software engineers, novel programming tools with maximal flexibility have to...
The Quantum Version Of Classification Decision Tree Constructing Algorithm C5.0
K. Khadiev, Ilnaz Mannapov, L. Safina·Jul 16, 2019
In the paper, we focus on complexity of C5.0 algorithm for constructing decision tree classifier that is the models for the classification problem from machine learning. In classical case the decision tree is constructed in $O(hd(NM+N \log N))$ runni...
Photonic quantum information processing: A concise review
S. Slussarenko, G. Pryde·Jul 15, 2019
Photons have been a flagship system for studying quantum mechanics, advancing quantum information science, and developing quantum technologies. Quantum entanglement, teleportation, quantum key distribution and early quantum computing demonstrations w...