Papers
Live trends in quantum computing research, updated daily from arXiv.
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14,823 papers in 12 months (-23% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A Backgate for Enhanced Tunability of Holes in Planar Germanium
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...
An Exponential Mixing Condition for Quantum Channels
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...
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...
Quantum Detection of Recurrent Dynamics
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...
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...
Lower Bound for Simulation Cost of Open Quantum Systems: Lipschitz Continuity Approach
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...
Quantum Computing for Phonon Scattering Effects on Thermal Conductivity
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...
A Nanomechanical Atomic Force Qubit
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...
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...
Comparing Algorithms for Loading Classical Datasets into Quantum Memory
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...
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...
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...
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 ...
Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter
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 ...
L2O-$g^{\dagger}$: Learning to Optimize Parameterized Quantum Circuits with Fubini-Study Metric Tensor
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...
Multicritical quantum sensors driven by symmetry-breaking
Sayan Mondal, Ayan Sahoo, Ujjwal Sen +1 more·Jul 19, 2024
Quantum criticality has been demonstrated as a useful quantum resource for parameter estimation. This includes second-order, topological and localization transitions. In all these works reported so far, gap-to-gapless transition at criticality has be...
Quantum Signal Processing and Quantum Singular Value Transformation on $U(N)$
Xi Lu, Yuan Liu, Hongwei Lin·Jul 19, 2024
Quantum signal processing and quantum singular value transformation are powerful tools to implement polynomial transformations of block-encoded matrices on quantum computers, and has achieved asymptotically optimal complexity in many prominent quantu...
Optimized Surface Ion Trap Design for Tight Confinement and Separation of Ion Chains
I. Gerasin, N. Zhadnov, K. Kudeyarov +3 more·Jul 19, 2024
Qubit systems based on trapped ultracold ions win one of the leading positions in the quantum computing field, demonstrating quantum algorithms with the highest complexity to date. Surface Paul traps for ion confinement open the opportunity to scale ...
Energy efficient coherent quantum control of nitrogen vacancy (NV) spin with nanoscale magnets
M. F. Chowdhury, Adi Jung, L. L. Spina +3 more·Jul 19, 2024
We investigate coherent quantum control of a nitrogen vacancy (NV) center in diamond with microwave fields generated from a nanoscale magnet that is proximal to the NV center. Our results show remarkable coherent control with high contrast Rabi oscil...