Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Surrogate-guided optimization in quantum networks
Luise Prielinger, Á. G. Iñesta, Gayane Vardoyan·Jul 24, 2024
When physical architectures become too complex for analytical study, numerical simulation proves essential to investigate quantum network behavior. Although highly informative, these simulations involve intricate numerical functions without known ana...
Route-Forcing: Scalable Quantum Circuit Mapping for Scalable Quantum Computing Architectures
Pau Escofet, Alejandro Gonzalvo, Eduard Alarc'on +2 more·Jul 24, 2024
Quantum computers are expected to scale in size to close the gap that currently exists between quantum algorithms and quantum hardware. To this end, quantum compilation techniques must scale along with the hardware constraints, shifting the current p...
A quantum leaky integrate-and-fire spiking neuron and network
D. Brand, Francesco Petruccione·Jul 23, 2024
Quantum machine learning is in a period of rapid development and discovery, however it still lacks the resources and diversity of computational models of its classical complement. With the growing difficulties of classical models requiring extreme ha...
One-Dimensional Quantum Dot Array Integrated with Charge Sensors in an InAs Nanowire.
Yi Luo, Xiao-Fei Liu, Zhi-Hai Liu +8 more·Jul 22, 2024
We report an experimental study of a 1D quintuple-quantum-dot array integrated with two charge sensors in an InAs nanowire. The device is studied by measuring double quantum dots formed consecutively in the array, and corresponding charge stability d...
Benchmarking of quantum fidelity kernels for Gaussian process regression
Xuyang Guo, J. Dai, R. Krems·Jul 22, 2024
Quantum computing algorithms have been shown to produce performant quantum kernels for machine-learning classification problems. Here, we examine the performance of quantum kernels for regression problems of practical interest. For an unbiased benchm...
Demonstration of a variational quantum eigensolver with a solid-state spin system under ambient conditions
Xuliang Du, Yang Shen, Zipeng Wu +2 more·Jul 22, 2024
Quantum simulators offer the potential to utilize the quantum nature of a physical system to study another physical system. In contrast to conventional simulation, which experiences an exponential increase in computational complexity, quantum simulat...
Concurrent VQE for Simulating Excited States of the Schwinger Model
Yibin Guo, Takis Angelides, Karl Jansen +1 more·Jul 22, 2024
This work explores the application of the concurrent variational quantum eigensolver (cVQE) for computing excited states of the Schwinger model. By designing suitable ansatz circuits utilizing universal SO(4) or SO(8) qubit gates, we demonstrate how ...
Optimization complexity and resource minimization of emitter-based photonic graph state generation protocols
E. Takou, Edwin Barnes, S. Economou·Jul 22, 2024
Photonic graph states are important for measurement- and fusion-based quantum computing, quantum networks, and sensing. They can in principle be generated deterministically by using emitters to create the requisite entanglement. Finding ways to minim...
Quantum Truncated Differential and Boomerang Attack
Huiqin Xie, Li Yang·Jul 21, 2024
In order to design quantum-safe block ciphers, it is crucial to investigate the application of quantum algorithms to cryptographic analysis tools. In this study, we use the Bernstein–Vazirani algorithm to enhance truncated differential cryptanalysis ...
Spin Qubits with Scalable milli-kelvin CMOS Control
Samuel K. Bartee, W. Gilbert, Kun Zuo +14 more·Jul 21, 2024
A key virtue of spin qubits is their sub-micron footprint, enabling a single silicon chip to host the millions of qubits required to execute useful quantum algorithms with error correction. With each physical qubit needing multiple control lines howe...
Scattering Processes from Quantum Simulation Algorithms for Scalar Field Theories
Andrew Hardy, Priyanka Mukhopadhyay, M. Sohaib Alam +8 more·Jul 18, 2024
We provide practical simulation methods for scalar field theories on a quantum computer that yield improved asymptotics as well as concrete gate estimates for the simulation and physical qubit estimates using the surface code. We achieve these improv...
Unruh-DeWitt Quantum Computing: Realizing Quantum Shannon Theory With Quantum Fields
Eric W. Aspling·Jul 18, 2024
Qubit-field quantum transduction provides numerous advantages to quantum computing, such as device-specific error-correcting codes, efficient scalability, and effective entanglement generation. An all-to-all connected bus of qubits implanted around t...
A time-parallel multiple-shooting method for large-scale quantum optimal control
N. Petersson, Stefanie Günther, Seung Whan Chung·Jul 18, 2024
Quantum optimal control plays a crucial role in quantum computing by providing the interface between compiler and hardware. Solving the optimal control problem is particularly challenging for multi-qubit gates, due to the exponential growth in comput...
Multi-stage tomography based on eigenanalysis for high-dimensional dense unitary processes in gate-based quantum computers
Y. Deville, A. Deville·Jul 18, 2024
Quantum Process Tomography (QPT) methods aim at identifying, i.e. estimating, a quantum process. QPT is a major quantum information processing tool, since it especially allows one to experimentally characterize the actual behavior of quantum gates, t...
Quantum vs. Symplectic Computers
Igor Volovich·Jul 17, 2024
In this paper, we propose the concept of symplectic computers, which have the potential to be more powerful than quantum computers. Unlike quantum computing, which consists of a sequence of unitary transformations (gates) and projectors (measurements...
Microscopic parametrizations for gate set tomography under coloured noise
P. Vinas, A. Bermudez·Jul 16, 2024
Gate set tomography (GST) allows for a self-consistent characterization of noisy quantum information processors (QIPs). The standard approach treats QIPs as black boxes only constrained by the laws of physics, attaining full generality at a considera...
Dissipationless topological quantum computation for Majorana objects in the sparse-dense mixed encoding process
Ye-Min Zhan, Guan-Dong Mao, Yu-Ge Chen +2 more·Jul 16, 2024
Topological quantum computation based on Majorana objects is subject to a significant challenge because at least some of the two-qubit quantum gates rely on the fermion (either charge or spin) parity of the qubits. This dependency renders the quantum...
Far from Perfect: Quantum Error Correction with (Hyperinvariant) Evenbly Codes
M. Steinberg, Junyu Fan, Robert J. Harris +3 more·Jul 16, 2024
We introduce a new class of qubit codes that we call Evenbly codes, building on a previous proposal of hyperinvariant tensor networks. Its tensor network description consists of local, non-perfect tensors describing CSS codes interspersed with Hadama...
Approximate inverse measurement channel for shallow shadows
Riccardo Cioli, Elisa Ercolessi, Matteo Ippoliti +2 more·Jul 16, 2024
Classical shadows are a versatile tool to probe many-body quantum systems, consisting of a combination of randomised measurements and classical post-processing computations. In a recently introduced version of the protocol, the randomization step is ...
Quantum and Classical Dynamics with Random Permutation Circuits
B. Bertini, Katja Klobas, Pavel Kos +1 more·Jul 16, 2024
Understanding thermalization in quantum many-body systems is among the most enduring problems in modern physics. A particularly interesting question concerns the role played by quantum mechanics in this process, i.e., whether thermalization in quantu...