Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Q# as a Quantum Algorithmic Language
Kartik Singhal, Kesha Hietala, Sarah Marshall +1 more·Jun 7, 2022
Q# is a standalone domain-specific programming language from Microsoft for writing and running quantum programs. Like most industrial languages, it was designed without a formal specification, which can naturally lead to ambiguity in its interpretati...
Sampling frequency thresholds for the quantum advantage of the quantum approximate optimization algorithm
Danylo Lykov, J. Wurtz, C. Poole +3 more·Jun 7, 2022
We compare the performance of the Quantum Approximate Optimization Algorithm (QAOA) with state-of-the-art classical solvers Gurobi and MQLib to solve the MaxCut problem on 3-regular graphs. We identify the minimum noiseless sampling frequency and dep...
Quantum Resources Required to Block-Encode a Matrix of Classical Data
B. D. Clader, A. Dalzell, N. Stamatopoulos +3 more·Jun 7, 2022
We provide a modular circuit-level implementation and resource estimates for several methods of block-encoding a dense <inline-formula><tex-math notation="LaTeX">$N\times N$</tex-math></inline-formula> matrix of classical data to precision <inline-fo...
Hybrid simplification rules for boundaries of quantum circuits
M. Epping·Jun 7, 2022
We describe rules to simplify quantum circuits at their boundaries, i.e. at state preparation and measurement. There, any strictly incoherent operation may be pushed into a preor post-processing of classical data. The rules can greatly simplify the i...
Iterative optimization in quantum metrology and entanglement theory using semidefinite programming
Árpád Lukács, Róbert Trényi, Tamás Vértesi +1 more·Jun 6, 2022
We discuss efficient methods to optimize the metrological performance over local Hamiltonians in a bipartite quantum system. For a given quantum state, our methods find the best local Hamiltonian for which the state outperforms separable states the m...
Improving the performance of quantum approximate optimization for preparing non-trivial quantum states without translational symmetry
Zheng-Hang Sun, Yong-Yi Wang, J. Cui +1 more·Jun 6, 2022
The variational preparation of complex quantum states using the quantum approximate optimization algorithm (QAOA) is of fundamental interest, and becomes a promising application of quantum computers. Here, we systematically study the performance of Q...
Fault-tolerant circuit synthesis for universal fault-tolerant quantum computing
Yongsoo Hwang·Jun 6, 2022
We present a quantum circuit synthesis algorithm for implementing universal fault-tolerant quantum computing based on concatenated codes. To realize faulttolerant quantum computing, the faulttolerant quantum protocols should be transformed into execu...
Extracting electronic many-body correlations from local measurements with artificial neural networks
Faluke Aikebaier, T. Ojanen, J. Lado·Jun 6, 2022
The characterization of many-body correlations provides a powerful tool for analyzing correlated quantum materials. However, experimental extraction of quantum entanglement in correlated electronic systems remains an open problem in practice. In part...
Fourier-based quantum signal processing
T. L. Silva, Lucas Borges, L. Aolita·Jun 6, 2022
Implementing general functions of operators is a powerful tool in quantum computation. It can be used as the basis for a variety of quantum algorithms including matrix inversion, real and imaginary-time evolution, and matrix powers. Quantum signal pr...
A system design approach toward integrated cryogenic quantum control systems
M. Prathapan, P. Mueller, David Heim +8 more·Jun 6, 2022
In this paper, we provide a system level perspective on the design of control electronics for large scale quantum systems. Quantum computing systems with high-fidelity control and readout, coherent coupling, calibrated gates, and reconfigurable circu...
Automatic oracle generation in Microsoft’s Quantum Development Kit using QIR and LLVM passes
Mathias Soeken, Mariia Mykhailova·Jun 6, 2022
Automatic oracle generation techniques can find optimized quantum circuits for classical components in quantum algorithms. However, most implementations of oracle generation techniques require that the classical component is expressed in terms of a c...
Quantum Complexity of Weighted Diameter and Radius in CONGEST Networks
Xudong Wu, Penghui Yao·Jun 6, 2022
This paper studies the round complexity of computing the weighted diameter and radius of a graph in the quantum CONGEST model. We present a quantum algorithm that (1+o (1))-approximates the diameter and radius with round complexity Õ (min (n n9/10D3/...
Quantum Neural Network Classifiers: A Tutorial
Weikang Li, Zhide Lu, D. Deng·Jun 6, 2022
Machine learning has achieved dramatic success over the past decade, with applications ranging from face recognition to natural language processing. Meanwhile, rapid progress has been made in the field of quantum computation including developing both...
Experimental Realization of Optimal Time‐Reversal on an Atom Chip for Quantum Undo Operations
Ivana Mastroserio, S. Gherardini, C. Lovecchio +4 more·Jun 6, 2022
The authors report the use of the dressed chopped random basis optimal control algorithm to realize time‐reversal procedures. The latter are aimed for the implementation of quantum undo operations in quantum technology contexts as quantum computing a...
Variational approach to quantum state tomography based on maximal entropy formalism.
Rishabh Gupta, M. Sajjan, R. Levine +1 more·Jun 6, 2022
Quantum state tomography is an integral part of quantum computation and offers the starting point for the validation of various quantum devices. One of the central tasks in the field of state tomography is to reconstruct, with high fidelity, the quan...
Using copies can improve precision in continuous-time quantum computing
Jemma Bennett, A. Callison, Tom O'Leary +3 more·Jun 6, 2022
In the quantum optimisation setting, we build on a scheme introduced by Young et al (2013 Phys. Rev. A 88 062314), where physical qubits in multiple copies of a problem encoded into an Ising spin Hamiltonian are linked together to increase the logica...
Near-term advances in quantum natural language processing
D. Widdows, Aaranya Alexander, D. Zhu +2 more·Jun 5, 2022
This paper describes experiments showing that some tasks in natural language processing (NLP) can already be performed using quantum computers, though so far only with small datasets. We demonstrate various approaches to topic classification. The fir...
Defect bulk-boundary correspondence of topological skyrmion phases of matter
Shu-Wei Liu, Li-kun Shi, A. Cook·Jun 5, 2022
Unpaired Majorana zero-modes are central to topological quantum computation schemes as building blocks of topological qubits, and are therefore under intense experimental and theoretical investigation. Their generalizations to parafermions and Fibona...
Avoiding barren plateaus via transferability of smooth solutions in a Hamiltonian variational ansatz
A. A. Mele, G. Mbeng, G. Santoro +2 more·Jun 4, 2022
A large ongoing research effort focuses on Variational Quantum Algorithms (VQAs), representing leading candidates to achieve computational speed-ups on current quantum devices. The scalability of VQAs to a large number of qubits, beyond the simulatio...
Clifford Algebras, Quantum Neural Networks and Generalized Quantum Fourier Transform
M. Trindade, V.N.A. Lula-Rocha, S. Floquet +1 more·Jun 3, 2022
We propose models of quantum perceptrons and quantum neural networks based on Clifford algebras. These models are capable to capture geometric features of classical and quantum data as well as producing data entanglement. Due to their representations...