Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Detecting errors in a quantum network with Pauli checks
Alvin Gonzales, Daniel Dilley, Bikun Li +2 more·May 24, 2024
We apply the quantum error detection scheme Pauli check sandwiching (PCS) to quantum networks by turning it into a distributed multiparty protocol. PCS provides protection on the targeted qubits and generally requires less resource overhead than stan...
Efficient universal qudit control using emulated spin rotations up to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>d</mml:mi><mml:mo>=</mml:mo><mml:mn>8</mml:mn></mml:mrow></mml:math>
E. Champion, Zihao Wang, R. Parker +1 more·May 24, 2024
Qudits hold great promise for efficient quantum computation and the simulation of high-dimensional quantum systems. Utilizing a local Hilbert space of dimension d>2 is known to speed up certain quantum algorithms relative to their qubit counterparts ...
Schrödinger cat states of a nuclear spin qudit in silicon
Xi Yu, Benjamin Wilhelm, Danielle Holmes +16 more·May 24, 2024
High-dimensional quantum systems are a valuable resource for quantum information processing. They can be used to encode error-correctable logical qubits, which has been demonstrated using continuous-variable states in microwave cavities or the motion...
Faster and Better Quantum Software Testing through Specification Reduction and Projective Measurements
Noah Oldfield, Christoph Laaber, T. Yue +1 more·May 24, 2024
Quantum computing (QC) promises polynomial and exponential speedups in many domains, such as unstructured search and prime number factoring. However, quantum programs yield probabilistic outputs from exponentially growing distributions and are vulner...
Synthetic High Angular Momentum Spin Dynamics in a Microwave Oscillator
Saswata Roy, Alen Senanian, Christopher S. Wang +10 more·May 24, 2024
Spins and oscillators are foundational to much of physics and applied sciences. For quantum information, a spin 1/2 exemplifies the most basic unit, a qubit. High angular momentum spins (HAMSs) and harmonic oscillators provide multilevel manifolds wh...
Parametrization and optimizability of pulse-level variational quantum eigensolvers
Kyle Sherbert, Hisham Amer, S. Economou +2 more·May 24, 2024
In conventional variational quantum eigensolvers (VQEs), trial states are prepared by applying series of parameterized gates to a reference state, with the gate parameters being varied to minimize the energy of the target system. Recognizing that the...
Digitized counterdiabatic quantum algorithms for logistics scheduling
Archismita Dalal, I. Montalban, N. N. Hegade +7 more·May 24, 2024
We study a job shop scheduling problem for an automatized robot in a high-throughput laboratory and a travelling salesperson problem with recently proposed digitized counterdiabatic quantum optimization (DCQO)algorithms. In DCQO, we find the solution...
Unsupervised Deep Neural Network Approach To Solve Bosonic Systems
Avishek Singh, NIRMAL K. Ganguli·May 24, 2024
The simulation of quantum many-body systems poses a significant challenge in physics due to the exponential scaling of Hilbert space with the number of particles. Traditional methods often struggle with large system sizes and frustrated lattices. In ...
Entanglement area law and Lieb-Schultz-Mattis theorem in long-range interacting systems, and symmetry-enforced long-range entanglement
Ruizhi Liu, Jinmin Yi, Shiyu Zhou +1 more·May 23, 2024
We establish multiple interrelated, fundamental results in quantum many-body systems that can have long-range interactions. For a sufficiently long quantum spin chain, we first show that if the multi-spin interactions in the Hamiltonian decay fast en...
The formation of entangled Schrödinger cat-like states in the process of spontaneous parametric down-conversion
Ranjit Singh, Alexander E. Teretenkov·May 23, 2024
We investigate entangled Schrödinger cat-like states (SCLSs) in degenerate and non-degenerate spontaneous parametric down-conversion (SPDC) with a fully quantized, depleted pump. Our fully quantum treatment, visualized via Wigner functions, reveals n...
Qudit Clauser-Horne-Shimony-Holt Inequality and Nonlocality from Wigner Negativity
Uta Isabella Meyer, Ivan Šupić, Damian Markham +1 more·May 23, 2024
Nonlocality is an essential concept that distinguishes quantum from classical models and has been extensively studied in systems of qubits. For higher-dimensional systems, certain results for their two-level counterpart, like Bell violations with sta...
Dynamic, symmetry-preserving, and hardware-adaptable circuits for quantum computing many-body states and correlators of the Anderson impurity model
Eric B. Jones, Cody James Winkleblack, Colin Campbell +5 more·May 23, 2024
We present a hardware-reconfigurable ansatz on Nq-qubits for the variational preparation of many-body states of the Anderson impurity model (AIM) with Nimp+Nbath=Nq/2 sites, which conserves total charge and spin z component within each variational se...
Analog counterdiabatic quantum computing
Qi Zhang, N. N. Hegade, Alejandro Gomez Cadavid +7 more·May 23, 2024
Harnessing the analog capacity of quantum processors at the algorithmic level is key to solving computationally hard problems. Neutral atoms offer analog capabilities supporting hundreds of qubits, but state-of-the-art adiabatic protocol struggles wi...
Qubit-Efficient Variational Quantum Algorithms for Image Segmentation
Supreeth Mysore Venkatesh, A. Macaluso, M. Nuske +2 more·May 23, 2024
Quantum computing is expected to transform a range of computational tasks beyond the reach of classical algorithms. In this work, we examine the application of variational quantum algorithms (VQAs) for unsupervised image segmentation to partition ima...
Compilation for Dynamically Field-Programmable Qubit Arrays with Efficient and Provably Near-Optimal Scheduling
Daniel Bochen Tan, Wan-Hsuan Lin, Jason Cong·May 23, 2024
Dynamically field-programmable qubit arrays based on neutral atoms feature high fidelity and highly parallel gates for quantum computing. However, it is challenging for compilers to fully leverage the novel flexibility offered by such hardware while ...
A Quantum Speed-Up for Approximating the Top Eigenvectors of a Matrix
Yanlin Chen, Andr'as Gily'en, Ronald de Wolf·May 23, 2024
Finding a good approximation of the top eigenvector of a given $d\times d$ matrix $A$ is a basic and important computational problem, with many applications. We give two different quantum algorithms that, given query access to the entries of a Hermit...
A high-level comparison of state-of-the-art quantum algorithms for breaking asymmetric cryptography
Martin Ekerå, Joel Gärtner·May 23, 2024
We provide a high-level cost comparison between Regev's quantum algorithm with Ekerå–Gärtner's extensions on the one hand, and existing state-of-the-art quantum algorithms for factoring and computing discrete logarithms on the other. This when target...
Quantum amplitude estimation from classical signal processing
Farrokh Labib, B. D. Clader, N. Stamatopoulos +1 more·May 23, 2024
We demonstrate that the problem of amplitude estimation, a core subroutine used in many quantum algorithms, can be mapped directly to a problem in signal processing called direction of arrival (DOA) estimation. The DOA task is to determine the direct...
Bayesian optimisation with improved information sharing for the variational quantum eigensolver
Milena Rohrs, A. Bochkarev, A. C. M. F. Itwm +1 more·May 23, 2024
This work presents a detailed empirical analysis of Bayesian optimisation with information sharing (BOIS) for the variational quantum eigensolver (VQE). The method is applied to computing the potential energy surfaces (PES) of the hydrogen and water ...
Scalable embedding of parity constraints in quantum annealing hardware
Michele Cattelan, Jemma Bennett, S. Yarkoni +1 more·May 23, 2024
One of the main bottlenecks in solving combinatorial optimization problems with quantum annealers is the qubit connectivity in the hardware. A possible solution for larger connectivty is minor embedding. This techniques makes the geometrical properti...