Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,373 papers in 12 months (-8% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Variational quantum algorithms for simulation of Lindblad dynamics
Tasneem M Watad, N. Lindner·May 4, 2023
We introduce variational hybrid classical-quantum algorithms to simulate the Lindblad master equation and its adjoint for time-evolving Markovian open quantum systems and quantum observables. Our methods are based on a direct representation of densit...
Verifiable Blind Quantum Computing with Trapped Ions and Single Photons.
P. Drmota, D. P. Nadlinger, D. Main +9 more·May 4, 2023
We report the first hybrid matter-photon implementation of verifiable blind quantum computing. We use a trapped-ion quantum server and a client-side photonic detection system networked via a fiber-optic quantum link. The availability of memory qubits...
Repetitive Readout and Real-Time Control of Nuclear Spin Qubits in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msup><mml:mi /><mml:mn>171</mml:mn></mml:msup><mml:mi>Yb</mml:mi></mml:math> Atoms
W. Huie, Lintao Li, Neville Chen +4 more·May 4, 2023
We demonstrate high fidelity repetitive projective measurements of nuclear spin qubits in an array of neutral ytterbium-171 ($^{171}$Yb) atoms. We show that the qubit state can be measured with a fidelity of 0.995(4) under a condition that leaves it ...
Qumode transfer between continuous- and discrete-variable devices
A. Macridin, A. Li, P. Spentzouris·May 4, 2023
Transferring quantum information between different types of quantum hardware is crucial for integrated quantum technology. In particular, converting information between continuous-variable (CV) and discrete-variable (DV) devices enables many applicat...
Mitigating crosstalk errors by randomized compiling: Simulation of the BCS model on a superconducting quantum computer
H. Perrin, Thibault Scoquart, A. Shnirman +2 more·May 3, 2023
We develop and apply an extension of the randomized compiling (RC) protocol that includes a special treatment of neighboring qubits and dramatically reduces crosstalk effects caused by the application of faulty gates on superconducting qubits in IBMQ...
A composite measurement scheme for efficient quantum observable estimation
Zi-Jian Zhang, Kouhei Nakaji, M. Choi +1 more·May 3, 2023
Estimation of the expectation value of observables is a key subroutine in quantum computing and is also the bottleneck of the performance of many near-term quantum algorithms. Many works have been proposed to reduce the number of measurements needed ...
Simulating Z_{2} lattice gauge theory on a quantum computer.
Clement Charles, Erik J. Gustafson, Elizabeth Hardt +6 more·May 3, 2023
The utility of quantum computers for simulating lattice gauge theories is currently limited by the noisiness of the physical hardware. Various quantum error mitigation strategies exist to reduce the statistical and systematic uncertainties in quantum...
Tensor Network Message Passing.
Yijia Wang, Yuwen Zhang, Feng Pan +1 more·May 3, 2023
When studying interacting systems, computing their statistical properties is a fundamental problem in various fields such as physics, applied mathematics, and machine learning. However, this task can be quite challenging due to the exponential growth...
Non-Gaussian Reconciliation for Continuous-Variable Quantum Key Distribution
Xiangyu Wang, Menghao Xu, Yin Zhao +3 more·May 3, 2023
Non-Gaussian modulation can improve the performance of continuous-variable quantum key distribution (CV-QKD). For Gaussian modulated coherent state CV-QKD, photon subtraction can realize non-Gaussian modulation, which can be equivalently implemented ...
Experimental quantum state transfer of an arbitrary single-qubit state on a cycle with four vertices using a coined quantum random walk
Gayatri Singh, K. Dorai, Arvind·May 3, 2023
We experimentally demonstrate the transfer of an unknown single-qubit state from Alice to Bob via a two-step discrete-time quantum random walk on a cycle with four vertices on a four-qubit nuclear magnetic resonance quantum processor. The qubits with...
Algorithmic Theory of Qubit Routing
Takehiro Ito, Naonori Kakimura, Naoyuki Kamiyama +2 more·May 3, 2023
The qubit routing problem, also known as the swap minimization problem, is a (classical) combinatorial optimization problem that arises in the design of compilers of quantum programs. We study the qubit routing problem from the viewpoint of theoretic...
Microwave loss characterization using multi-mode superconducting resonators
C. Lei, S. Ganjam, Lev Krayzman +5 more·May 3, 2023
Measuring the losses arising from different materials and interfaces is crucial to improving the coherence of superconducting quantum circuits. Although this has been of interest for a long time, current studies can either only provide bounds to thos...
Approximate quantum error correction, covariance symmetry, and their relation
Hao Dai·May 3, 2023
To perform reliable quantum computation, quantum error correction is indispensable. In certain cases, continuous covariance symmetry of the physical system can make exact error correction impossible. In this work we study the approximate error correc...
Obfuscating Quantum Hybrid-Classical Algorithms for Security and Privacy
S. Upadhyay, Swaroop Ghosh·May 3, 2023
As quantum computing gains popularity, it’s crucial to tackle security and privacy issues upfront. One major concern is the involvement of third-party tools and hardware. With more quantum computing services available, even from less reputable source...
Performance Analysis of Quantum CSS Error-Correcting Codes via MacWilliams Identities
Diego Forlivesi, Lorenzo Valentini, Marco Chiani·May 2, 2023
We analyze the performance of quantum stabilizer codes, one of the most important classes for practical implementations, on both symmetric and asymmetric quantum channels. To this aim, we first derive the weight enumerator (WE) for the undetectable e...
Energy-dependent barren plateau in bosonic variational quantum circuits
Bingzhi Zhang, Quntao Zhuang·May 2, 2023
Bosonic variational quantum circuits (VQCs) are crucial for information processing in microwave cavities, trapped ions, and optical systems, widely applicable in quantum communication, sensing and error correction. The trainability of such VQCs is le...
Randomized Reversible Gate-Based Obfuscation for Secured Compilation of Quantum Circuit
Subrata Das, Swaroop Ghosh·May 2, 2023
The success of quantum circuits in providing reliable outcomes for a given problem depends on the gate count and depth in near-term noisy quantum computers. Quantum circuit compilers that decompose high-level gates to native gates of the hardware and...
Quantum Fourier Iterative Amplitude Estimation
J. J. M. D. Lejarza, M. Grossi, L. Cieri +1 more·May 2, 2023
Monte Carlo integration is a widely used numerical method for approximating integrals, which is often computationally expensive. In recent years, quantum computing has shown promise for speeding up Monte Carlo integration, and several quantum algorit...
Quantum circuit implementation and resource analysis of LBlock and LiCi
Xiaoyu Jing, Yanjun Li, Guangyue Zhao +2 more·May 2, 2023
Due to Grover’s algorithm, any exhaustive search attack of block ciphers can achieve a quadratic speed-up. To implement Grover’s exhaustive search and accurately estimate the required resources, one needs to implement the target ciphers as quantum ci...
Low-Noise Quantum Frequency Conversion of Photons from a Trapped Barium Ion to the Telecom O-band
Uday Saha, J. Siverns, J. Hannegan +2 more·May 2, 2023
Trapped ions are one of the leading candidates for scalable and long-distance quantum networks because of their long qubit coherence time, high fidelity single- and two-qubit gates, and their ability to generate photons entangled with the qubit state...