Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Decoding techniques applied to the compilation of CNOT circuits for NISQ architectures
T. Brugière, M. Baboulin, Benoît Valiron +2 more·Jan 17, 2022
Abstract Current proposals for quantum compilers require the synthesis and optimization of linear reversible circuits and among them CNOT circuits. Since these circuits represent a significant part of the cost of running an entire quantum circuit, we...
Reducing the Depth of Linear Reversible Quantum Circuits
T. Brugière, M. Baboulin, Benoît Valiron +2 more·Jan 17, 2022
In quantum computing the decoherence time of the qubits determines the computation time available, and this time is very limited when using current hardware. In this article, we minimize the execution time (the depth) for a class of circuits referred...
Shortcuts to Adiabaticity for Fast Qubit Readout in Circuit Quantum Electrodynamics
F. C'ardenas-L'opez, Xi Chen·Jan 16, 2022
We propose how to engineer the longitudinal coupling to accelerate the measurement of a qubit longitudinally coupled to a cavity, motivated by the concept of shortcuts to adiabaticity. Different modulations are inversely designed from two methods of ...
Single Temporal-Pulse-Modulated Parameterized Controlled-Phase Gate for Rydberg Atoms
X. X. Li, X. Shao, Weibin Li·Jan 16, 2022
We propose an adiabatic protocol for implementing a controlled-phase gate CZ$_{\theta}$ with continuous $\theta$ of neutral atoms through a symmetrical two-photon excitation process via the second resonance line, $6P$ in $^{87}$Rb, with a single-temp...
Localization for magnetic quantum walks
Fan Yang·Jan 15, 2022
Quantum walk was first proposed by Aharonov, Davidovich and Zagury [1]. It can be viewed as a quantum mechanical analogue of the classical random walk. Compared to the diffusive transport in the classical random walk, quantum walk leads to a ballisti...
Smolyak Algorithm Adapted to a System-Bath Separation: Application to an Encapsulated Molecule with Large-Amplitude Motions.
Ahai Chen, D. Benoit, Y. Scribano +2 more·Jan 15, 2022
A Smolyak algorithm adapted to system-bath separation is proposed for rigorous quantum simulations. This technique combines a sparse grid method with the system-bath concept in a specific configuration without limitations on the form of the Hamiltoni...
Approximate separation of quantum gates and separation experiments of CNOT based on Particle Swarm Optimization algorithm
K. He, Shusen Liu, J. Hou·Jan 15, 2022
Ying conceived of using two or more small-capacity quantum computers to produce a larger-capacity quantum computing system by quantum parallel programming ([M. S. Ying, Morgan-Kaufmann, 2016]). In doing so, the main obstacle is separating the quantum...
Experimental realization of quantum teleportation of arbitrary single and two-qubit states via hypergraph states
Atmadev Rai, B. K. Behera·Jan 15, 2022
Here we demonstrate quantum teleportation through hypergraph states, which are the generalization of graph states, and due to their non-local entanglement properties, it allows us to perform quantum teleportation. Here we design some hypergraph state...
Cut Query Algorithms with Star Contraction
Simon Apers, Yuval Efron, Paweł Gawrychowski +3 more·Jan 14, 2022
We study the complexity of determining the edge connectivity of a simple graph with cut queries. We show that (i) there is a bounded-error randomized algorithm that computes edge connectivity with $O(n)$ cut queries, and (ii) there is a bounded-error...
Efficient realization of quantum primitives for Shor’s algorithm using PennyLane library
A. V. Antipov, E. Kiktenko, A. Fedorov·Jan 14, 2022
Efficient realization of quantum algorithms is among main challenges on the way towards practical quantum computing. Various libraries and frameworks for quantum software engineering have been developed. Here we present a software package containing ...
Solving DC power flow problems using quantum and hybrid algorithms
Fang Gao, Guojian Wu, Suhang Guo +2 more·Jan 13, 2022
Power flow calculation plays an important role in planning, operation, and control of the power system. The quantum HHL algorithm can achieve theoretical exponential speedup over classical algorithms on DC power flow calculation. Since the qubit reso...
Towards Quantum Graph Neural Networks: An Ego-Graph Learning Approach
Xing Ai, Zhihong Zhang, Luzhe Sun +2 more·Jan 13, 2022
Quantum machine learning is a fast-emerging field that aims to tackle machine learning using quantum algorithms and quantum computing. Due to the lack of physical qubits and an effective means to map real-world data from Euclidean space to Hilbert sp...
Complete description of fault-tolerant quantum gate operations for topological Majorana qubit systems
Adrian D. Scheppe, M. V. Pak·Jan 12, 2022
Among the list of major threats to quantum computation, quantum decoherence poses one of the largest because it generates losses to the environment within a computational system which cannot be recovered via error correction methods. These methods re...
From Causal Representation of Multiloop Scattering Amplitudes to Quantum Computing
S. Ram'irez-Uribe·Jan 12, 2022
An overview of a quantum algorithm application for the identification of causal singular configurations of multiloop Feynman diagrams is presented. The quantum algorithm is implemented in two different quantum simulators, the output obtained is direc...
Implementation of a digitally encoded multigrid algorithm on a quantum computer
P. Jaksch·Jan 12, 2022
Multigrid has become a popular method for solving some of the most challenging real-world computational problems, such as computational fluid dynamics (CFD). The reason for this is the very good scaling properties of multigrid, which is often linear,...
Error-robust quantum signal processing using Rydberg atoms
Sina Zeytinouglu, S. Sugiura·Jan 12, 2022
Rydberg atom arrays have recently emerged as one of the most promising platforms for quantum simulation and quantum information processing. However, as is the case for other experimental platforms, the longer-term success of the Rydberg atom arrays i...
QUBO-based density matrix electronic structure method
C. Negre, A. Lopez-Bezanilla, Yu Zhang +4 more·Jan 12, 2022
Density matrix electronic structure theory is used in many quantum chemistry methods to “alleviate” the computational cost that arises from directly using wave functions. Although density matrix based methods are computationally more efficient than w...
Systematic Literature Review: Quantum Machine Learning and its applications
David Peral Garc'ia, Juan Cruz-Benito, Francisco Jos'e Garc'ia-Penalvo·Jan 11, 2022
Quantum computing is the process of performing calculations using quantum mechanics. This field studies the quantum behavior of certain subatomic particles for subsequent use in performing calculations, as well as for large-scale information processi...
Overcoming the entanglement barrier in quantum many-body dynamics via space-time duality
Alessio Lerose, Michael Sonner, D. Abanin·Jan 11, 2022
Describing non-equilibrium properties of quantum many-body systems is challenging due to high entanglement in the wavefunction. We describe evolution of local observables via the influence matrix (IM), which encodes the effects of a many-body system ...
Twist: sound reasoning for purity and entanglement in Quantum programs
Charles Yuan, C. McNally, Michael Carbin·Jan 11, 2022
Quantum programming languages enable developers to implement algorithms for quantum computers that promise computational breakthroughs in classically intractable tasks. Programming quantum computers requires awareness of entanglement, the phenomenon ...