Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,415 papers in 12 months (-6% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Computing for Rotating, Charged and String Theory Black Holes
V. Chandra, M. McGuigan·Jul 7, 2022
The quantum mechanics of Rotating, Charged, de Sitter and String Theory black holes are of recent interest because of their peculiar thermodynamic properties, as well the mysterious nature of their microstates. A full quantum treatment of the operato...
The Quantum Approximate Optimization Algorithm performance with low entanglement and high circuit depth
Rishi Sreedhar, Pontus Vikstaal, Marika Svensson +3 more·Jul 7, 2022
Variational quantum algorithms constitute one of the most widespread methods for using current noisy quantum computers. However, it is unknown if these heuristic algorithms provide any quantum-computational speedup, although we cannot simulate them c...
Quantum advantage in variational Bayes inference
Hideyuki Miyahara, V. Roychowdhury·Jul 7, 2022
Significance Quantum machine learning (QML) is an emerging research field that deals with quantum algorithms for data analysis. It is hoped that QML will yield practical demonstrations of quantum advantage by exploiting the emerging noisy intermediat...
Extensive characterization and implementation of a family of three-qubit gates at the coherence limit
Christopher N. Warren, Jorge Fern'andez-Pend'as, Shahnawaz Ahmed +13 more·Jul 6, 2022
While all quantum algorithms can be expressed in terms of single-qubit and two-qubit gates, more expressive gate sets can help reduce the algorithmic depth. This is important in the presence of gate errors, especially those due to decoherence. Using ...
A highly accurate quantum optimization algorithm for CT image reconstruction based on sinogram patterns
Kyungtaek Jun·Jul 6, 2022
Computed tomography (CT) has been developed as a nondestructive technique for observing minute internal images in samples. It has been difficult to obtain photorealistic (clean or clear) CT images due to various unwanted artifacts generated during th...
Milestones of research activity in quantum computing: EPS grand challenges
Z. Seskir, J. Biamonte·Jul 6, 2022
We argue that quantum computing underwent an inflection point circa 2017. Long promised funding materialised which prompted public and private investments around the world. Techniques from machine learning suddenly influenced central aspects of the f...
Quantum decomposition algorithm for master equations of stochastic processes: The damped spin case
M. Almasri, M. Wahiddin·Jul 6, 2022
In this paper, we introduce a quantum decomposition algorithm (QDA) that decomposes the problem [Formula: see text] into a summation of eigenvalues times phase–space variables. One interesting feature of QDA stems from its ability to simulate damped ...
A generalisation of the Phase Kick-Back
J. Ossorio-Castillo, Ulises Pastor-D'iaz, J. Tornero·Jul 6, 2022
In this paper, we present a generalisation of the Phase Kick-Back technique, which is central to some of the classical algorithms in quantum computing. We will begin by recalling the Phase Kick-Back technique to then introduce the new generalised ver...
Markov chain Monte Carlo methods for graph refinement in spinfoam cosmology
Pietropaolo Frisoni, F. Gozzini, F. Vidotto·Jul 6, 2022
We study the behavior of the Lorentzian Engle-Pereira-Rovelli-Livine spinfoam amplitude with homogeneous boundary data, under a graph refinement going from five to twenty boundary tetrahedra. This can be interpreted as a wave function of the Universe...
Quantitative characterization of several entanglement detection criteria
A. Sauer, J. Z. Bern'ad·Jul 5, 2022
Quantitative characterization of different entanglement detection criteria for bipartite systems is presented. We review the implication sequence of these criteria and then numerically estimate volume ratios between criteria non-violating quantum sta...
Entanglement structure in the volume-law phase of hybrid quantum automaton circuits
Yi-Fan Han, Xiao Chen·Jul 5, 2022
We study entanglement fluctuations and quantum error correction in the weakly monitored volume-law phase of quantum automaton circuits subject to repeated local measurements. We numerically observe that the entanglement entropy exhibits strong fluctuat...
Knowledge Distillation in Quantum Neural Network using Approximate Synthesis
M. Alam, Satwik Kundu, Swaroop Ghosh·Jul 5, 2022
Recent assertions of a potential advantage of Quantum Neural Network (QNN) for specific Machine Learning (ML) tasks have sparked the curiosity of a sizable number of application researchers. The parameterized quantum circuit (PQC), a major building b...
Quantum Circuit Compiler for a Shuttling-Based Trapped-Ion Quantum Computer
Fabian Kreppel, C. Melzer, Janis Wagner +4 more·Jul 5, 2022
The increasing capabilities of quantum computing hardware and the challenge of realizing deep quantum circuits require fully automated and efficient tools for compiling quantum circuits. To express arbitrary circuits in a sequence of native gates spe...
Carleman linearization approach for chemical kinetics integration toward quantum computation
Takaki Akiba, Y. Morii, K. Maruta·Jul 5, 2022
The Harrow, Hassidim, Lloyd (HHL) algorithm, known as the pioneering algorithm for solving linear equations in quantum computers, is expected to accelerate solving large-scale linear ordinary differential equations (ODEs). To efficiently combine clas...
Distributed Quantum Computing with Photons and Atomic Memories
E. Oh, Xuanying Lai, J. Wen +1 more·Jul 5, 2022
The promise of universal quantum computing requires scalable single‐ and inter‐qubit control interactions. Currently, three of the leading candidate platforms for quantum computing are based on superconducting circuits, trapped ions, and neutral atom...
Can one hear the shape of a wormhole?
S. Antonini, Petar Simidzija, Brian Swingle +1 more·Jul 5, 2022
A large class of flat big bang-big crunch cosmologies with negative cosmological constant are related by analytic continuation to asymptotically AdS traversable wormholes with planar cross section. In recent works (arXiv:2102.05057, arXiv:2203.11220)...
An Improved Volumetric Metric for Quantum Computers via more Representative Quantum Circuit Shapes
K. Miller, Charles Broomfield, A. Cox +2 more·Jul 5, 2022
In this work, we propose a generalization of the current most widely used quantum computing hardware metric known as the quantum volume. The quantum volume specifies a family of random test circuits defined such that the logical circuit depth is equa...
High-throughput decoder of quasi-cyclic LDPC codes with limited precision for continuous-variable quantum key distribution systems
Chuang Zhou, Yang Li, Li Ma +7 more·Jul 5, 2022
— More than Mbps secret key rate was demonstrated for continuous-variable quantum key distribution (CV-QKD) systems, but real-time postprocessing is not allowed, which is restricted by the throughput of the error correction decoding in postprocessing...
Preparations for Quantum Simulations of Quantum Chromodynamics in 1+1 Dimensions: (I) Axial Gauge
R. Farrell, I. Chernyshev, Sarah J. M. Powell +3 more·Jul 4, 2022
Tools necessary for quantum simulations of $1+1$ dimensional quantum chromodynamics are developed. When formulated in axial gauge and with two flavors of quarks, this system requires 12 qubits per spatial site with the gauge fields included via non-l...
Clifford Circuit Initialisation for Variational Quantum Algorithms
M. Cheng, K. Khosla, C. Self +4 more·Jul 4, 2022
We present an initialisation method for variational quantum algorithms applicable to intermediate scale quantum computers. The method uses simulated annealing of the efficiently simulable Clifford parameter points as a pre-optimisation to find a low ener...