Papers
Live trends in quantum computing research, updated daily from arXiv.
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14,824 papers in 12 months (-23% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Gibbs Sampling gives Quantum Advantage at Constant Temperatures with O(1)-Local Hamiltonians
Joel Rajakumar, James D. Watson·Aug 2, 2024
Sampling from Gibbs states -- states corresponding to system in thermal equilibrium -- has recently been shown to be a task for which quantum computers are expected to achieve super-polynomial speed-up compared to classical computers, provided the lo...
Quantum noise modeling through Reinforcement Learning
Simone Bordoni, Andrea Papaluca, Piergiorgio Buttarini +3 more·Aug 2, 2024
In the current era of quantum computing, robust and efficient tools are essential to bridge the gap between simulations and quantum hardware execution. In this work, we introduce a machine learning approach to characterize the noise impacting a quant...
Radiofrequency cascade readout of coupled spin qubits
Jacob F. Chittock-Wood, Ross C. C. Leon, Michael A. Fogarty +12 more·Aug 2, 2024
Silicon spin qubits based on metal-oxide-semiconductor (MOS) technology are compatible with semiconductor manufacturing and offer a route to scalable quantum processing. However, spin readout typically relies on proximal charge sensors, which add arc...
Bosonic Holes in Quadratic Bosonic Systems
Jia-Ming Hu, Bo Wang, Ze-Liang Xiang·Aug 2, 2024
Hole degrees of freedom play a central role in the exact solution of quadratic (mean-field) systems. Although a variety of experiments have suggested the existence of bosonic holes, a consistent and complete theory has long been hindered by the ghost...
Computing Riemann zeros with light scattering
Sunkyu Yu, Xianji Piao, N. Park·Aug 2, 2024
Finding hidden order within disorder is a common interest in material science, wave physics, and mathematics. The Riemann hypothesis, stating the locations of nontrivial zeros of the Riemann zeta function, tentatively characterizes statistical order ...
Complete Self-Testing of a System of Remote Superconducting Qubits.
S. Storz, Anatoly Kulikov, J. Schär +6 more·Aug 2, 2024
Self-testing protocols enable the certification of quantum systems in a device-independent manner, i.e., without knowledge of the inner workings of the quantum devices under test. Here, we demonstrate this high standard for characterization routines ...
Error Correction of Transversal cnot Gates for Scalable Surface-Code Computation
K. Sahay, Yingjia Lin, Shilin Huang +2 more·Aug 2, 2024
Recent experimental advances have made it possible to implement logical multiqubit transversal gates on surface codes in a multitude of platforms. A transversal controlled- (t) gate on two surface codes introduces correlated errors across the code bl...
Efficient conversion from fermionic Gaussian states to matrix product states
Tong Liu, Ying-Hai Wu, Hong-Hao Tu +1 more·Aug 2, 2024
Fermionic Gaussian states (FGSs) are eigenstates of quadratic Hamiltonians and widely used in quantum many-body problems. We propose a highly efficient algorithm that converts FGSs to matrix product states (MPSs). It can be formulated for finite-size...
Generalised Circuit Partitioning for Distributed Quantum Computing
Felix Burt, Kuan-Cheng Chen, Kin K. Leung·Aug 2, 2024
Distributed quantum computing (DQC) is a new paradigm aimed at scaling up quantum computing via the interconnection of smaller quantum processing units (QPUs). Shared entanglement allows teleportation of both states and gates between QPUs. This leads...
Validation of an Analysability Model in Hybrid Quantum Software
Ana Díaz-Muñoz, J. A. Cruz-Lemus, Moisés Rodríguez +2 more·Aug 2, 2024
In the context of quantum-classical hybrid computing, evaluating analysability, which is the ease of understanding and modifying software, presents significant challenges due to the complexity and novelty of quantum algorithms. Although advances have...
Certifiably Robust Encoding Schemes
Aman Saxena, Tom Wollschlager, Nicola Franco +2 more·Aug 2, 2024
Quantum machine learning uses principles from quantum mechanics to process data, offering potential advances in speed and performance. However, previous work has shown that these models are susceptible to attacks that manipulate input data or exploit...
Analyzing Quantum Circuit Depth Reduction with Ancilla Qubits in MCX Gates
Ahmad Bennakhi, Paul Franzon, Gregory T. Byrd·Aug 2, 2024
This paper aims to give readers a high-level overview of the different MCX depth reduction techniques that utilize ancilla qubits. We also exhibit a brief analysis of how they would perform under different quantum topological settings. The techniques...
Time-Efficient Logical Operations on Quantum Low-Density Parity Check Codes.
Guo Zhang, Ying Li·Aug 2, 2024
We propose schemes capable of measuring an arbitrary set of commutative logical Pauli operators in time independent of the number of operators. The only condition is commutativity, a fundamental requirement for simultaneous measurements in quantum me...
Long-lived metastable-qubit memory
Xiaoyang Shi, Jasmine Sinanan-Singh, Kyle DeBry +3 more·Aug 2, 2024
Coherent storage of quantum information is crucial to many quantum technologies. Long coherence times have been demonstrated in trapped-ion qubits, typically using the hyperfine levels within the ground state of a single ion. However, recent research...
Optimizing Variational Quantum Circuits Using Metaheuristic Strategies in Reinforcement Learning
Michael Kolle, Daniel Seidl, Maximilian Zorn +3 more·Aug 2, 2024
Quantum Reinforcement Learning (QRL) offers potential advantages over classical Reinforcement Learning, such as compact state space representation and faster convergence in certain scenarios. However, practical benefits require further validation. QR...
Optimizing quantum error correction protocols with erasure qubits
Shouzhen Gu, Yotam Vaknin, Alex Retzker +1 more·Aug 1, 2024
Erasure qubits offer a promising avenue toward reducing the overhead of quantum error correction (QEC) protocols. However, they require additional operations, such as erasure checks, that may add extra noise and increase runtime of QEC protocols. To ...
Classification of joint quantum measurements based on entanglement cost of localization
Jef Pauwels, Alejandro Pozas-Kerstjens, Flavio Del Santo +1 more·Aug 1, 2024
Despite their importance in quantum theory, joint quantum measurements remain poorly understood. An intriguing conceptual and practical question is whether joint quantum measurements on separated systems can be performed without bringing them togethe...
Krylov complexity of purification
Rathindra Nath Das, Takato Mori·Aug 1, 2024
In quantum systems, purification can map mixed states into pure states and a non-unitary evolution into a unitary one by enlarging the Hilbert space. We establish a connection between the complexities of mixed quantum states and their purification, p...
Perfect Wave Transfer in Continuous Quantum Systems
Per Moosavi, Matthias Christandl, Gian Michele Graf +1 more·Aug 1, 2024
The transfer of information from one part of a quantum system to another is fundamental to the understanding and design of quantum information processing devices. In the realm of discrete systems such as spin chains, inhomogeneous networks have been ...
Optimally robust shortcuts to population inversion in cat-state qubits
Shao-Wei Xu, Zhong-Zheng Zhang, Yue-Ying Guo +2 more·Aug 1, 2024
Cat-state qubits formed by photonic coherent states are a promising candidate for realizing fault-tolerant quantum computing. Such logic qubits have a biased noise channel that the bit-flip error dominates over all the other errors. In this manuscrip...