Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Complexity for one-dimensional discrete-time quantum walk circuits
Aranya Bhattacharya, Himanshu Sahu, Ahmadullah Zahed +1 more·Jul 25, 2023
We compute the complexity for the mixed state density operator derived from a one-dimensional discrete-time quantum walk (DTQW). The complexity is computed using a two-qubit quantum circuit obtained from canonically purifying the mixed state. We demo...
Elastic Entangled Pair and Qubit Resource Management in Quantum Cloud Computing
Rakpong Kaewpuang, Minrui Xu, D. Hoang +5 more·Jul 25, 2023
Quantum cloud computing (QCC) offers a promising approach to efficiently provide quantum computing resources, such as quantum computers, to perform resource-intensive tasks. Like traditional cloud computing platforms, QCC providers can offer both res...
Fundamental causal bounds of quantum random access memories
Yunfei Wang, Y. Alexeev, Liang Jiang +2 more·Jul 25, 2023
Our study evaluates the limitations and potentials of Quantum Random Access Memory (QRAM) within the principles of quantum physics and relativity. QRAM is crucial for advancing quantum algorithms in fields like linear algebra and machine learning, pu...
Energy preserving evolutions over Bosonic systems
Paul Gondolf, Tim Möbus, C. Rouzé·Jul 25, 2023
The exponential convergence to invariant subspaces of quantum Markov semigroups plays a crucial role in quantum information theory. One such example is in bosonic error correction schemes, where dissipation is used to drive states back to the code-sp...
Measurement-Free Fault-Tolerant Quantum Error Correction in Near-Term Devices
Sascha Heußen, David F. Locher, M. Muller·Jul 25, 2023
Logical qubits can be protected from decoherence by performing QEC cycles repeatedly. Algorithms for fault-tolerant QEC must be compiled to the specific hardware platform under consideration in order to practically realize a quantum memory that opera...
String amplitudes and mutual information in confining backgrounds: the partonic behavior
M. Ghodrati·Jul 25, 2023
In the background of several holographic confining backgrounds, we present the connections between the behaviors of string scattering amplitudes and mutual information. We lay down the analogies between the logarithmic branch cut behavior of the stri...
Improved precision scaling for simulating coupled quantum-classical dynamics
Sophia Simon, Raffaele Santagati, Matthias Degroote +3 more·Jul 24, 2023
We present a super-polynomial improvement in the precision scaling of quantum simulations for coupled classical-quantum systems in this paper. Such systems are found, for example, in molecular dynamics simulations within the Born-Oppenheimer approxim...
Investigation of Floquet engineered non-Abelian geometric phase for holonomic quantum computing
Logan W. Cooke, A. Tashchilina, Mason Protter +5 more·Jul 24, 2023
Holonomic quantum computing (HQC) functions by transporting an adiabatically degenerate manifold of computational states around a closed loop in a control-parameter space; this cyclic evolution results in a non-Abelian geometric phase which may coupl...
Characteristics, implementation, and applications of special perfect entanglers
K. Selvan, S. Balakrishnan·Jul 24, 2023
In this paper, we discuss the characteristics of special perfect entanglers from a new perspective, present the results obtained from the implementation of special perfect entangler circuits using cross-resonance interaction, and discuss their applic...
Improved Digital Quantum Simulation by Non-Unitary Channels
W. Gong, Y. Kharkov, Minh C. Tran +2 more·Jul 24, 2023
Simulating quantum systems is one of the most promising avenues to harness the computational power of quantum computers. However, hardware errors in noisy near-term devices remain a major obstacle for applications. Ideas based on the randomization of...
Charge and entanglement criticality in a U(1)-symmetric hybrid circuit of qubits
Ahana Chakraborty, Kun Chen, A. Zabalo +2 more·Jul 24, 2023
We study critical properties of the entanglement and charge-sharpening measurement-induced phase transitions in a non-unitary quantum circuit evolving with a U(1) conserved charge. Our numerical estimation of the critical properties of the entangleme...
Long-range <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>C</mml:mi><mml:mi>C</mml:mi><mml:mi mathvariant="normal">Φ</mml:mi></mml:mrow></mml:math> gates via radio-frequency-induced Förster resonances
I. Ashkarin, S. Lepoutre, P. Pillet +3 more·Jul 24, 2023
Registers of trapped neutral atoms, excited to Rydberg states to induce strong long-distance interactions, are extensively studied for direct applications in quantum computing. Here we present a CCΦ quantum phase gate protocol based on radio-frequenc...
Characterizing non-Markovian quantum processes by fast Bayesian tomography
R. Y. Su, J. Y. Huang, N. D. Stuyck +15 more·Jul 23, 2023
To push gate performance to levels beyond the thresholds for quantum error correction, it is important to characterize the error sources occurring on quantum gates. However, the characterization of non-Markovian error poses a challenge to current qua...
Dissipative learning of a quantum classifier
Ufuk Korkmaz, Denz Türkpençe·Jul 23, 2023
The expectation that quantum computation might bring performance advantages in machine learning algorithms motivates the work on the quantum versions of artificial neural networks. In this study, we analyse the learning dynamics of a quantum classifi...
Single entanglement connection architecture between multi-layer bipartite hardware efficient ansatz
Shikun Zhang, Zheng Qin, Yang Zhou +3 more·Jul 23, 2023
Variational quantum algorithms are among the most promising algorithms to achieve quantum advantages in the noisy intermediate-scale quantum (NISQ) era. One important challenge in implementing such algorithms is to construct an effective parameterize...
Efficient Lattice Hamiltonian Encoding for the Shortest Vector Problem
Eden Schirman, Cong Ling, Florian Mintert·Jul 22, 2023
The advent of quantum computing necessitates the transition of worldwide cryptosystems to post-quantum cryptography (PQC), which is founded upon the problem of finding short vectors in high-dimensional structured lattices. It is assumed that the stru...
Scalable tensor-network error mitigation for near-term quantum computing
Sergei E. Filippov, Matea Leahy, M. Rossi +1 more·Jul 21, 2023
Until fault-tolerance becomes implementable at scale, quantum computing will heavily rely on noise mitigation techniques. While methods such as zero noise extrapolation with probabilistic error amplification (ZNE-PEA) and probabilistic error cancella...
Connecting quantum cities: simulation of a satellite-based quantum network
Raja Yehia, M. Schiavon, Valentina Marulanda Acosta +4 more·Jul 21, 2023
We present and analyze an architecture for a European-scale quantum network using satellite links to connect Quantum Cities, which are metropolitan quantum networks with minimal hardware requirements for the end users. Using NetSquid, a quantum netwo...
MORE: Measurement and Correlation Based Variational Quantum Circuit for Multi-Classification
Jindi Wu, Tianjie Hu, Qun Li·Jul 21, 2023
Quantum computing has shown considerable promise for compute-intensive tasks in recent years. For instance, classification tasks based on quantum neural networks (QNN) have garnered significant interest from researchers and have been evaluated in var...
Uncomputation in the Qrisp High-Level Quantum Programming Framework
Raphael Seidel, Nikolay Tcholtchev, Sebastian Bock +1 more·Jul 21, 2023
Uncomputation is an essential part of reversible computing and plays a vital role in quantum computing. Using this technique, memory resources can be safely deallocated without performing a nonreversible deletion process. For the case of quantum comp...