Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Hybrid Quantum Annealing for Larger-than-QPU Lattice-structured Problems
Jack Raymond, R. Stevanovic, William Bernoudy +6 more·Feb 7, 2022
Quantum processing units (QPUs) executing annealing algorithms have shown promise in optimization and simulation applications. Hybrid algorithms are a natural bridge to larger applications. We present a simple greedy method for solving larger-than-QP...
Classically optimized variational quantum eigensolver with applications to topological phases
K. Okada, Keita Osaki, K. Mitarai +1 more·Feb 7, 2022
Variational quantum eigensolver (VQE) is regarded as a promising candidate of hybrid quantum-classical algorithm for the near-term quantum computers. Meanwhile, VQE is confronted with a challenge that statistical error associated with the measurement...
QUARK: A Framework for Quantum Computing Application Benchmarking
Jernej Rudi Finžgar, Philipp Ross, Johannes Klepsch +1 more·Feb 7, 2022
Quantum computing (QC) is anticipated to provide a speedup over classical approaches for specific problems in optimization, simulation, and machine learning. With the advances in quantum computing toward practical applications, the need to analyze an...
Scaling of the quantum approximate optimization algorithm on superconducting qubit based hardware
Johannes Weidenfeller, Lucia C. Valor, Julien Gacon +4 more·Feb 7, 2022
Quantum computers may provide good solutions to combinatorial optimization problems by leveraging the Quantum Approximate Optimization Algorithm (QAOA). The QAOA is often presented as an algorithm for noisy hardware. However, hardware constraints lim...
SpinQ Triangulum: A commercial three-qubit desktop quantum computer
Guanru Feng, Shin-Yao Hou, Hongyan Zhou +10 more·Feb 7, 2022
SpinQ Triangulum is the second generation of the desktop quantum computers designed and manufactured by SpinQ Technology. SpinQ’s desktop quantum computer series, based on a room-temperature nuclear magnetic resonance (NMR) spectrometer, provides lig...
Toward Quantum Computing with Molecular Electronics.
Phillip W K Jensen, L. B. Kristensen, C. Lavigne +1 more·Feb 7, 2022
In this study, we explore the use of molecules and molecular electronics for quantum computing. We construct one-qubit gates using one-electron scattering in molecules and two-qubit controlled-phase gates using electron-electron scattering along meta...
Coordinately assisted distillation of quantum coherence in multipartite system
Huangang Wang, Qi Luo, Qi-Ping Su +4 more·Feb 7, 2022
We investigate the issue of assisted coherence distillation in the asymptotic limit, by coordinately performing the identical local operations on the auxiliary systems of each copy. When we further restrict the coordinate operations to projective mea...
Optimization on Large Interconnected Graphs and Networks Using Adiabatic Quantum Computation
Venkat Padmasola, Rupak Chatterjee·Feb 6, 2022
In this paper, we demonstrate that it is possible to create an adiabatic quantum computing algorithm that solves the shortest path between any two vertices on an undirected graph with at most 3V qubits, where V is the number of vertices of the graph....
Post Quantum Cryptography: Techniques, Challenges, Standardization, and Directions for Future Research
Ritik Bavdekar, Eashan Jayant Chopde, Ashutosh Bhatia +3 more·Feb 6, 2022
The development of large quantum computers will have dire consequences for cryptography. Most of the symmetric and asymmetric cryptographic algorithms are vulnerable to quantum algorithms. Grover's search algorithm gives a square root time boost for ...
On the High Dimensional RSA Algorithm - A Public Key Cryptosystem Based on Lattice and Algebraic Number Theory
Zhiyong Zheng, Fengxia Liu·Feb 6, 2022
The most known of public key cryptosystem was introduced in 1978 by Rivest, Shamir and Adleman [19] and now called the RSA public key cryptosystem in their honor. Later, a few authors gave a simply extension of RSA over algebraic numbers field( see [...
Transitions in Entanglement Complexity in Random Circuits
Sarah True, A. Hamma·Feb 5, 2022
Entanglement is the defining characteristic of quantum mechanics. Bipartite entanglement is characterized by the von Neumann entropy. Entanglement is not just described by a number, however; it is also characterized by its level of complexity. The co...
Parallel quantum chemistry on noisy intermediate-scale quantum computers
Robert Schade, C. Bauer, Konstantin Tamoev +3 more·Feb 4, 2022
A novel parallel hybrid quantum-classical algorithm for the solution of the quantum-chemical ground-state energy problem on gate-based quantum computers is presented. This approach is based on the reduced density-matrix functional theory (RDMFT) form...
Faster exact solution of sparse MaxCut and QUBO problems
Daniel Rehfeldt, Thorsten Koch, Y. Shinano·Feb 4, 2022
The maximum-cut problem is one of the fundamental problems in combinatorial optimization. With the advent of quantum computers, both the maximum-cut and the equivalent quadratic unconstrained binary optimization problem have experienced much interest...
Beware of Greeks bearing entanglement? Quantum covert channels, information flow and non-local games
David Mestel·Feb 4, 2022
Can quantum entanglement increase the capacity of (classical) covert channels? To one familiar with Holevo's Theorem it is tempting to think that the answer is obviously no. However, in this work we show: quantum entanglement can in fact increase the...
Rotationally Invariant Circuits: Universality with the Exchange Interaction and Two Ancilla Qubits.
I. Marvian, Hanqing Liu, Austin Hulse·Feb 4, 2022
Universality of local unitary transformations is one of the cornerstones of quantum computing with many applications and implications that go beyond this field. However, it has recently been shown that this universality does not hold in the presence ...
Observation of Wave-Packet Branching through an Engineered Conical Intersection
Christopher S. Wang, N. Frattini, Benjamin J. Chapman +4 more·Feb 4, 2022
In chemical reactions, the interplay between coherent evolution and dissipation is central to determining key properties such as the rate and yield. Of particular interest are cases where two potential energy surfaces cross at features known as conic...
Compact quantum kernel-based binary classifier
Carsten Blank, Adenilton J. da Silva, L. P. de Albuquerque +2 more·Feb 4, 2022
Quantum computing opens exciting opportunities for kernel-based machine learning methods, which have broad applications in data analysis. Recent works show that quantum computers can efficiently construct a model of a classifier by engineering the qu...
Microscopic theory of a magnetic-field-tuned sweet spot of exchange interactions in multielectron quantum-dot systems
G. Chan, Xin Wang·Feb 4, 2022
The exchange interaction in a singlet-triplet qubit defined by two-electron states in the double-quantum-dot system ("two-electron singlet-triplet qubit") typically varies monotonically with the exchange interaction and thus carries no sweet spot. He...
From quantum speed limits to energy-efficient quantum gates
Maxwell Aifer, Sebastian Deffner·Feb 3, 2022
While recent breakthroughs in quantum computing promise the nascence of the quantum information age, quantum states remain delicate to control. Moreover, the required energy budget for large scale quantum applications has only sparely been considered...
On constant-time quantum annealing and guaranteed approximations for graph optimization problems
Arthur Braida, S. Martiel, Ioan Todinca·Feb 3, 2022
Quantum annealing (QA) is a computational framework where a quantum system’s continuous evolution is used to find the global minimum of an objective function over an unstructured search space. It can be seen as a general metaheuristic for optimizatio...