Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Classical variational optimization of a PREPARE circuit for quantum phase estimation of quantum chemistry Hamiltonians
Hayata Morisaki, K. Mitarai, K. Fujii +1 more·Aug 26, 2023
We propose a method for constructing circuits for quantum phase estimation of a molecular Hamiltonian in quantum chemistry by using variational optimization of quantum circuits solely on classical computers. The circuit generates a quantum state whic...
Efficient Long-Range Entanglement Using Dynamic Circuits
Elisa Baumer, Vinay Tripathi, Derek S. Wang +5 more·Aug 24, 2023
Quantum simulation traditionally relies on unitary dynamics, inherently imposing efficiency constraints on the generation of intricate entangled states. In principle, these limitations can be superseded by nonunitary, dynamic circuits. These circuits...
Global Synthesis of CNOT Circuits with Holes
Ewan Murphy, A. Kissinger·Aug 23, 2023
A common approach to quantum circuit transformation is to use the properties of a specific gate set to create an efficient representation of a given circuit's unitary, such as a parity matrix or stabiliser tableau, and then resynthesise an improved c...
Development of a Novel Quantum Pre-processing Filter to Improve Image Classification Accuracy of Neural Network Models
Farina Riaz, Shahab A. Abdulla, Hajime Suzuki +3 more·Aug 22, 2023
This paper proposes a novel quantum pre-processing filter (QPF) to improve the image classification accuracy of neural network (NN) models. A simple four qubit quantum circuit that uses Y rotation gates for encoding and two controlled NOT gates for c...
Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays
Irina Heinz, A. Mills, J. Petta +1 more·Aug 22, 2023
In recent advancements of quantum computing utilizing spin qubits, it has been demonstrated that this platform possesses the potential for implementing two-qubit gates with fidelities exceeding 99.5%. However, as with other qubit platforms, it is not...
Several fitness functions and entanglement gates in quantum kernel generation
Haiyan Wang·Aug 22, 2023
Quantum machine learning (QML) represents a promising frontier in the quantum technologies. In this pursuit of quantum advantage, the quantum kernel method for support vector machine has emerged as a powerful approach. Entanglement, a fundamental con...
Exploiting the Quantum Advantage for Satellite Image Processing: Review and Assessment
Soronzonbold Otgonbaatar, Dieter Kranzlmüller·Aug 18, 2023
This article examines the current status of quantum computing (QC) in Earth observation and satellite imagery. We analyze the potential limitations and applications of quantum learning models when dealing with satellite data, considering the persiste...
Design and execution of quantum circuits using tens of superconducting qubits and thousands of gates for dense Ising optimization problems
Filip B. Maciejewski, Stuart Hadfield, Benjamin C. Hall +13 more·Aug 18, 2023
We develop a hardware-efficient ansatz for variational optimization, derived from existing ansatze in the literature, that parametrizes subsets of all interactions in the Cost Hamiltonian in each layer. We treat gate orderings as a variational parame...
A Bottom-up Approach to Constructing Symmetric Variational Quantum Circuits
Babatunde M. Ayeni·Aug 17, 2023
In the age of noisy quantum processors, the exploitation of quantum symmetries can be quite beneficial in the efficient preparation of trial states, an important part of the variational quantum eigensolver algorithm. The benefits include building qua...
Protocol for nearly deterministic parity projection on two photonic qubits
Chenxu Liu, R. Frantzeskakis, S. Economou +1 more·Aug 17, 2023
Photonic parity projection plays an important role in photonic quantum information processing. Nondestructive parity projections normally require high-fidelity controlled-Z gates between photonic and matter qubits, which can be experimentally demandi...
Constant-depth circuits for Boolean functions and quantum memory devices using multi-qubit gates
J. Allcock, Jing Bao, J. F. Doriguello +2 more·Aug 16, 2023
<jats:p>We explore the power of the unbounded Fan-Out gate and the Global Tunable gates generated by Ising-type Hamiltonians in constructing constant-depth quantum circuits, with particular attention to quantum memory devices. We propose two types of...
Universal quantum computing based on magnetic domain wall qubits
Shuang Li, Xichao Zhang, M. Ezawa +1 more·Aug 15, 2023
Quantum computers allow to solve efficiently certain problems that are intractable for classical computers. For the realization of a quantum computer, a qubit design as the basic building block is a nontrivial starting point. We propose the utilizati...
Exploring the Potential of Qutrits for Quantum Optimization of Graph Coloring
Gabriel Bottrill, Mudit Pandey, Olivia Di Matteo·Aug 15, 2023
Recent hardware demonstrations and advances in circuit compilation have made quantum computing with higher- dimensional systems (qudits) on near-term devices an attractive possibility. Some problems have more natural or optimal en- codings using qudi...
High-threshold and low-overhead fault-tolerant quantum memory
S. Bravyi, Andrew W. Cross, J. Gambetta +3 more·Aug 15, 2023
The accumulation of physical errors1–3 prevents the execution of large-scale algorithms in current quantum computers. Quantum error correction4 promises a solution by encoding k logical qubits onto a larger number n of physical qubits, such that the ...
A Proposed Quantum Hamiltonian Encoding Framework for Time Evolution Operator Design of Potential Energy Function
M. R. Laskar, K. Dasgupta, A. Bhattacharya·Aug 12, 2023
The exploration of potential energy operators in quantum systems holds paramount significance, offering profound insights into atomic behaviour, defining interactions, and enabling precise prediction of molecular dynamics. By embracing the Born-Oppen...
An Efficient Quantum Factoring Algorithm
O. Regev·Aug 12, 2023
We show that n-bit integers can be factorized by independently running a quantum circuit with \(\tilde{O}(n^{3/2})\) gates for \(\sqrt {n}+4\) times, and then using polynomial-time classical post-processing. The correctness of the algorithm relies on...
Protocols to measure the non-Abelian Berry phase by pumping a spin qubit through a quantum-dot loop
Baksa Kolok, Andr'as P'alyi·Aug 10, 2023
A quantum system constrained to a degenerate energy eigenspace can undergo a nontrival time evolution upon adiabatic driving, described by a non-Abelian Berry phase. This type of dynamics may provide logical gates in quantum computing that are robust...
Randomness-Enhanced Expressivity of Quantum Neural Networks.
Yadong Wu, Juan Yao, P. Zhang +1 more·Aug 9, 2023
As a hybrid of artificial intelligence and quantum computing, quantum neural networks (QNNs) have gained significant attention as a promising application on near-term, noisy intermediate-scale quantum devices. Conventional QNNs are described by param...
Wavefunction branching: when you can't tell pure states from mixed states
Jordan K. Taylor, I. McCulloch·Aug 8, 2023
We propose a definition of wavefunction "branchings": quantum superpositions which can't be feasibly distinguished from the corresponding mixed state, even under time evolution. Our definition is largely independent of interpretations, requiring only...
Simulation of IBM's kicked Ising experiment with Projected Entangled Pair Operator
H. Liao, Kang L. Wang, Zongzheng Zhou +2 more·Aug 6, 2023
We perform classical simulations of the 127-qubit kicked Ising model, which was recently emulated using a quantum circuit with error mitigation [Nature 618, 500 (2023)]. Our approach is based on the projected entangled pair operator (PEPO) in the Hei...