Papers

Sanchari Chakraborti, Rafael D. Sorkin, Urbasi Sinha·Jul 22, 2024

The history based formalism known as Quantum Measure Theory (QMT) generalizes the concept of probability-measure so as to incorporate quantum interference. The resulting \textit{quantum measure} $μ$ is defined for arbitrary events (sets of histories)...

Bhuvanesh Sundar, Maxime Dupont·Jul 22, 2024

Quantum optimization solvers typically rely on one-variable-to-one-qubit mapping. However, the low qubit count on current quantum computers is a major obstacle in competing against classical methods. Here, we develop a qubit-efficient algorithm that ...

William Troy·Jul 22, 2024

The advent of quantum computing holds the potential to revolutionize various fields by solving complex problems more efficiently than classical computers. Despite this promise, practical quantum advantage is hindered by current hardware limitations, ...

M. C. Lobl, Susan X. Chen, Stefano Paesani +1 more·Jul 22, 2024

Fast decoding algorithms are decisive for real-time quantum error correction and for analyzing properties of error correction codes. Here, we develop variants of the union-find decoder that simplify its implementation and provide potential decoding s...

Luigi Ruggiero, A. Nigro, I. Zardo +1 more·Jul 22, 2024

Planar semiconductor heterostructures offer versatile device designs and are promising candidates for scalable quantum computing. Notably, heterostructures based on strained germanium have been extensively studied in recent years, with an emphasis on...

A. Souissi, A. Barhoumi·Jul 22, 2024

Quantum channels, pivotal in information processing, describe transformations within quantum systems and enable secure communication and error correction. Ergodic and mixing properties elucidate their behavior. In this paper, we establish a sufficien...

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...

M. H. Freedman·Jul 22, 2024

Quantum dynamics that explores an unexpectedly small fraction of Hilbert space is inherently interesting. Integrable systems, quantum scars, MBL, hidden tensor structures, and systems with gauge symmetries are examples. Beyond dimension and volume, s...

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...

Zhiyan Ding, M. Junge, Philipp Schleich +1 more·Jul 22, 2024

Simulating quantum dynamics is one of the most promising applications of quantum computers. While the upper bound of the simulation cost has been extensively studied through various quantum algorithms, much less work has focused on establishing the l...

Xiangjun Tan·Jul 22, 2024

Recent investigations have demonstrated that multi-phonon scattering processes substantially influence the thermal conductivity of materials, posing significant computational challenges for classical simulations as the complexity of phonon modes esca...

Shahin Jahanbani, Zi-Huai Zhang, Bin Hua +5 more·Jul 22, 2024

Silicon nanomechanical resonators display ultra-long lifetimes at cryogenic temperatures and microwave frequencies. Achieving quantum control of single-phonons in these devices has so far relied on nonlinearities enabled by coupling to ancillary qubi...

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...

Andriy V. Miranskyy, Mushahid Khan, U. C. Mendes·Jul 22, 2024

Quantum computers are gaining importance in various applications like quantum machine learning and quantum signal processing. These applications face significant challenges in loading classical datasets into quantum memory. With numerous algorithms a...

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 ...

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...

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...

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 ...

M. Governale, C. Schönenberger, P. Scarlino +1 more·Jul 21, 2024

As a waveguide circuit QED architecture, we investigate theoretically the single-photon pair emission of a Cooper pair splitter composed of two double quantum dots, each coupled to a microwave transmission line. We find that this system can generate ...

Yu-Chao Huang, H. Goan·Jul 20, 2024

Before the advent of fault-tolerant quantum computers, variational quantum algorithms (VQAs) play a crucial role in noisy intermediate-scale quantum (NISQ) machines. Conventionally, the optimization of VQAs predominantly relies on manually designed o...