Stabilization of Kerr-cat qubits with quantum circuit refrigerator by Shumpei Masuda, Shunsuke Kamimura, Tsuyoshi Yamamoto, Takaaki Aoki, Akiyoshi Tomonaga

“…Abstract A periodically driven superconducting nonlinear resonator can implement a Kerr-cat qubit, which provides a promising route to a quantum computer with a long lifetime. However, the system is vulnerable to pure dephasing, which causes unwanted excitations outside the qubit subspace. …”
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Quantum Bayesian Inference with Renormalization for Gravitational Waves by Gabriel Escrig, Roberto Campos, Hong Qi, M. A. Martin-Delgado

“…However, qBIRD can accommodate a broader parameter space when the constraints are eliminated with a small-scale quantum computer of sufficient logical qubits.…”
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Investigation of New Optical Solutions for the Fractional Schrödinger Equation with Time-Dependent Coefficients: Polynomial, Random, Trigonometric, and Hyperbolic Functions by Ekram E. Ali, Marwa Ennaceur, Wael W. Mohammed, Mohamed S. Algolam, Athar I. Ahmed

“…Because the Schrödinger equation is widely employed in quantum computers, quantum mechanics, physics, engineering, and chemistry, the solutions developed can be utilized to examine a wide range of important physical phenomena. …”
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Transportable and Ultra-Stable Laser System for ¹³³<i>Cs</i> Rydberg Excitation by Zhongxiao Xu, Changtao Zhao, Donghao Li

“…Recent progress in Rydberg atoms has enabled a wide range of applications in quantum sensing and quantum computation. In these applications, ultra-stable optical reference systems are essential to meet the requirements of a narrow linewidth and low technical noise. …”
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Post-Quantum Homomorphic Encryption: A Case for Code-Based Alternatives by Siddhartha Siddhiprada Bhoi, Arathi Arakala, Amy Beth Corman, Asha Rao

“…Since Shor’s algorithm rendered prime factorisation and discrete logarithm-based ciphers insecure with quantum computations, researchers have been working on building post-quantum homomorphic encryption (PQHE) algorithms. …”
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Performance and Achievable Rates of the Gottesman-Kitaev-Preskill Code for Pure-Loss and Amplification Channels by Guo Zheng, Wenhao He, Gideon Lee, Kyungjoo Noh, Liang Jiang

“…Quantum error-correction codes protect information from realistic noisy channels and lie at the heart of quantum computation and communication tasks. Understanding the optimal performance and other information-theoretic properties, such as the achievable rates, of a given code is crucial, as these factors determine the fundamental limits imposed by the encoding in conjunction with the noise channel. …”
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Sparse Blossom: correcting a million errors per core second with minimum-weight matching by Oscar Higgott, Craig Gidney

“…For 0.1% circuit-level depolarising noise, sparse blossom processes syndrome data in both $X$ and $Z$ bases of distance-17 surface code circuits in less than one microsecond per round of syndrome extraction on a single core, which matches the rate at which syndrome data is generated by superconducting quantum computers. Our implementation is open-source, and has been released in version 2 of the PyMatching library.…”
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An Enhanced Learning with Error-Based Cryptosystem: A Lightweight Quantum-Secure Cryptography Method by Mostefa Kara, Konstantinos Karampidis, Giorgos Papadourakis, Mohammad Hammoudeh, Muath AlShaikh

“…Post-quantum encryption (PQE) aims to counter the threats posed by future quantum computers, highlighting the need for further improvement. …”
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Lower bounds for quantum-inspired classical algorithms via communication complexity by Nikhil S. Mande, Changpeng Shao

“…Quantum-inspired classical algorithms provide us with a new way to understand the computational power of quantum computers for practically-relevant problems, especially in machine learning. …”
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Demonstration of Algorithmic Quantum Speedup for an Abelian Hidden Subgroup Problem by Phattharaporn Singkanipa, Victor Kasatkin, Zeyuan Zhou, Gregory Quiroz, Daniel A. Lidar

“…It is one of the earliest problems for which an exponential quantum speedup was proven for ideal, noiseless quantum computers, albeit in the oracle model. Here, using two different 127-qubit IBM Quantum superconducting processors, we demonstrate an algorithmic quantum speedup for a variant of Simon’s problem where the hidden period has a restricted Hamming weight w. …”
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Nonlinear transformation of complex amplitudes via quantum singular value transformation by Naixu Guo, Kosuke Mitarai, Keisuke Fujii

“…Due to the linearity of quantum operations, it is not straightforward to implement nonlinear transformations on a quantum computer, making some practical tasks like a neural network hard to achieve. …”
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Emergent Holographic Forces from Tensor Networks and Criticality by Rahul Sahay, Mikhail D. Lukin, Jordan Cotler

“…However, probing this conjecture on contemporary classical or quantum computers is challenging. We formulate an efficiently implementable multiscale entanglement renormalization ansatz model of AdS/CFT, providing a mapping between a (1+1)-dimensional critical spin system and a (2+1)-dimensional bulk theory. …”
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Resource overheads and attainable rates for trapped-ion lattice surgery by Hudson Leone, Thinh Le, S. Srikara, Simon Devitt

“…Our results indicate an urgent need for optical coupling to improve by one or more orders of magnitude for trapped-ion quantum computers to scale.…”
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A lattice-based anti-quantum privacy-preserving scheme for smart meter by Shaomin Zhang, Tao Li, Yun Sun, Baoyi Wang

“…Moreover, taking advantage of the fact that the lattice-based hard problems cannot be solved in quantum computers, the lattice-based encryption and signature are designed in the scheme to resist quantum attacks. …”
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Robust error accumulation suppression for quantum circuits by Tatsuki Odake, Philip Taranto, Nobuyuki Yoshioka, Toshinari Itoko, Kunal Sharma, Antonio Mezzacapo, Mio Murao

“…We present a robust error accumulation suppression (REAS) technique to manage errors in quantum computers. Our method reduces the accumulation of errors in any quantum circuit composed of single- or two-qubit gates expressed as e^{−iσθ} for Pauli operators σ and θ∈[0,π), which forms a universal gate set. …”
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Analysis of D-Wave Topologies with <i>k</i>-Hop-Based Graph Metrics by Csaba Biró, Gábor Kusper

“…In this paper, we present a graph-based analysis of the topology of D-Wave quantum computers, focusing on the Pegasus, Chimera, and Zephyr architectures. …”
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On Classical Simulation of Quantum Circuits Composed of Clifford Gates by George Biswas

“…While we do not provide a formal proof of the theorem, we offer intuitive physical insights at each stage where necessary, empowering readers to grasp the fundamental principles underpinning this intriguing aspect of quantum computation. Quanta 2024; 13: 20–27. …”
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Digital Simulation of Single Qubit Markovian Open Quantum Systems: A Tutorial by Ian Joel David, Ilya Sinayskiy, Francesco Petruccione

“… One of the first proposals for the use of quantum computers was the simulation of quantum systems. …”
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Spatial electron-photon entanglement by Eitan Kazakevich, Hadar Aharon, Ofer Kfir

“…Free electron beams and their quantum coupling with photons are attracting a rising interest due to the basic questions they address and the innovative technology these particles are involved in, such as microscopy, spectroscopy, and quantum computation. This work proposes spatially encoded coupling, where a dual-rail-like electron (e^{−}) state is entangled to a dual-rail photonic qubit. …”
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A dephasing sweet spot with enhanced dipolar coupling by Jann H. Ungerer, Alessia Pally, Stefano Bosco, Artem Kononov, Deepankar Sarmah, Sebastian Lehmann, Claes Thelander, Ville F. Maisi, Pasquale Scarlino, Daniel Loss, Andreas Baumgartner, Christian Schönenberger

“…Abstract Two-level systems (TLSs) are the basic units of quantum computers but face a trade-off between operation speed and coherence due to shared coupling paths. …”
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