Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
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...
Natural Orbitals and Sparsity of Quantum Mutual Information.
Leonardo Ratini, Chiara Capecci, L. Guidoni·Aug 15, 2023
Natural orbitals, defined in electronic structure and quantum chemistry as the molecular orbitals diagonalizing the one-particle reduced density matrix of the ground state, have been conjectured for decades to be the perfect reference orbitals to des...
Fault-tolerant complexes
H. Bombin, C. Dawson, Terry Farrelly +5 more·Aug 15, 2023
Fault-tolerant complexes describe surface-code fault-tolerant protocols from a single geometric object. We first introduce fusion complexes that define a general family of fusion-based quantum computing (FBQC) fault-tolerant quantum protocols based o...
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 ...
Sequence Processing with Quantum Tensor Networks
Carys Harvey, Richie Yeung, K. Meichanetzidis·Aug 15, 2023
We introduce complex-valued tensor network models for sequence processing motivated by correspondence to probabilistic graphical models, interpretability and resource compression. Inductive bias is introduced to our models via network architecture, a...
Single Qubit State Estimation on NISQ Devices with Limited Resources and SIC-POVMs
Cristian A. Galvis-Florez, Daniel Reitzner, Simo Särkkä·Aug 15, 2023
Current quantum computers have the potential to overcome classical computational methods, however, the capability of the algorithms that can be executed on noisy intermediate-scale quantum devices is limited due to hardware imperfections. Estimating ...
Benchmarking highly entangled states on a 60-atom analogue quantum simulator
Adam L. Shaw, Zhuo Chen, Joonhee Choi +6 more·Aug 15, 2023
Quantum systems have entered a competitive regime in which classical computers must make approximations to represent highly entangled quantum states1,2. However, in this beyond-classically-exact regime, fidelity comparisons between quantum and classi...
Efficient Quantum Mixed-State Tomography with Unsupervised Tensor Network Machine Learning
Wenjiang Li, Kai Xu, Heng Fan +2 more·Aug 14, 2023
Quantum state tomography (QST) is plagued by the ``curse of dimensionality'' due to the exponentially-scaled complexity in measurement and data post-processing. Efficient QST schemes for large-scale mixed states are currently missing. In this work, w...
Energy Efficiency of Quantum Statevector Simulation at Scale
J. Adamski, James P Richings, O. T. Brown·Aug 14, 2023
Classical simulations are essential for the development of quantum computing, and their exponential scaling can easily fill any modern supercomputer. In this paper we consider the performance and energy consumption of large Quantum Fourier Transform ...
Universal quantum Otto heat machine based on the Dicke model.
He-Guang Xu, Jiasen Jin, G. Neto +1 more·Aug 13, 2023
In this paper we study a quantum Otto thermal machine where the working substance is composed of N identical qubits coupled to a single mode of a bosonic field, where the atoms and the field interact with a reservoir, as described by the so-called op...
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...
QECC-Synth: A Layout Synthesizer for Quantum Error Correction Codes on Sparse Architectures
Keyi Yin, Hezi Zhang, Xiang Fang +4 more·Aug 12, 2023
Quantum Error Correction (QEC) codes are essential for achieving fault-tolerant quantum computing (FTQC). However, their implementation faces significant challenges due to disparity between required dense qubit connectivity and sparse hardware archit...
Split-State Non-Malleable Codes and Secret Sharing Schemes for Quantum Messages
Naresh Goud Boddu, Vipul Goyal, Rahul Jain +1 more·Aug 12, 2023
Non-malleable codes are fundamental objects at the intersection of cryptography and coding theory. These codes provide security guarantees even in settings where error correction and detection are impossible, and have found applications to several ot...
PQC-HA: A Framework for Prototyping and In-Hardware Evaluation of Post-Quantum Cryptography Hardware Accelerators
Richard Sattel, Christoph Spang, Carsten Heinz +1 more·Aug 12, 2023
In the third round of the NIST Post-Quantum Cryptography standardization project, the focus is on optimizing software and hardware implementations of candidate schemes. The winning schemes are CRYSTALS Kyber and CRYSTALS Dilithium, which serve as a K...
4-Bit Factorization Circuit Composed of Multiplier Units With Superconducting Flux Qubits Toward Quantum Annealing
D. Saida, M. Hidaka, Y. Yamanashi·Aug 12, 2023
Prime factorization (P = M × N) is considered to be a promising application in quantum computations. We perform 4-bit factorization in experiments using a superconducting flux qubit toward quantum annealing (QA). Our proposed method uses a supercondu...
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...
Minimum Hilbert-Schmidt distance for Schmidt rank 2 states
Palash Pandya·Aug 11, 2023
The Hilbert-Schmidt distance between two states is proven to be non-contractive under CPTP maps, and therefore is not considered as an entanglement measure. However, that alone does not imply that the minimum Hilbert-Schmidt distance from the set of ...
A Modular Engine for Quantum Monte Carlo Integration
I. Akhalwaya, Adam Connolly, R. Guichard +8 more·Aug 11, 2023
We present the Quantum Monte Carlo Integration (QMCI) engine developed by Quantinuum. It is a quantum computational tool for evaluating multi-dimensional integrals that arise in various fields of science and engineering such as finance. This white pa...
Qibolab: an open-source hybrid quantum operating system
Stavros Efthymiou, Alvaro Orgaz-Fuertes, Rodolfo Carobene +13 more·Aug 11, 2023
We present Qibolab, an open-source software library for quantum hardware control integrated with the Qibo quantum computing middleware framework. Qibolab provides the software layer required to automatically execute circuit-based algorithms on custom...
Generating quantum channels from functions on discrete sets
A. Quillen, Rayleigh W. Parker, Nathan Skerrett·Aug 11, 2023
Using the recent ability of quantum computers to initialize quantum states rapidly with high fidelity, we use a function operating on a discrete set to create a simple class of quantum channels. Fixed points and periodic orbits, that are present in t...