Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Modular Cluster Circuits for the Variational Quantum Eigensolver.
S. E. Ghasempouri, G. Dueck, Stijn De Baerdemacker·May 8, 2023
The variational quantum eigensolver algorithm recently became a popular method to compute the quantum chemical properties of molecules on noisy intermediate scale quantum (NISQ) devices. In order to avoid noise accumulation from the NISQ device in th...
A sharp phase transition in linear cross-entropy benchmarking
Brayden Ware, A. Deshpande, D. Hangleiter +4 more·May 8, 2023
Demonstrations of quantum computational advantage and benchmarks of quantum processors via quantum random circuit sampling are based on evaluating the linear cross-entropy benchmark (XEB). A key question in the theory of XEB is whether it approximate...
Generalised Coupling and An Elementary Algorithm for the Quantum Schur Transform
Adam Wills, Sergii Strelchuk·May 6, 2023
The quantum Schur transform is a fundamental building block that maps the computational basis to a coupled basis consisting of irreducible representations of the unitary and symmetric groups. Equivalently, it may be regarded as a change of basis from...
Resource Management in Quantum Virtual Private Networks
Shahrooz Pouryousef, Nitish K. Panigrahy, Monimoy Deb Purkayastha +4 more·May 5, 2023
In this study, we develop a resource management framework for a quantum virtual private network (qVPN), which involves the sharing of an underlying public quantum network by multiple organizations for quantum entanglement distribution. Our approach i...
Parallelization of frequency domain quantum gates: manipulation and distribution of frequency-entangled photon pairs generated by a 21 GHz silicon microresonator
Antoine Henry, D. Fioretto, Lorenzo M. Procopio +8 more·May 5, 2023
Abstract. Harnessing the frequency dimension in integrated photonics offers key advantages in terms of scalability, noise resilience, parallelization, and compatibility with telecom multiplexing techniques. Integrated ring resonators have been used t...
Microarchitectures for Heterogeneous Superconducting Quantum Computers
S. Stein, S. Sussman, T. Tomesh +12 more·May 5, 2023
Noisy Intermediate-Scale Quantum Computing (NISQ) has dominated headlines in recent years, with the longer-term vision of Fault-Tolerant Quantum Computation (FTQC) offering significant potential albeit at currently intractable resource costs and quan...
Evidence that PUBO outperforms QUBO when solving continuous optimization problems with the QAOA
Jonas Stein, Farbod Chamanian, Maximilian Zorn +4 more·May 5, 2023
Quantum computing provides powerful algorithmic tools that have been shown to outperform established classical solvers in specific optimization tasks. A core step in solving optimization problems with known quantum algorithms such as the Quantum Appr...
Calibration of syndrome measurements in a single experiment
C. Wimmer, Jochen Szangolies, M. Epping·May 4, 2023
Quantum error correction can reduce the effects of noise in quantum systems, e.g. in metrology or most notably in quantum computing. Typically, this requires making measurements that provide information about the errors that have occurred in the syst...
A Modular Quantum Compilation Framework for Distributed Quantum Computing
Davide Ferrari, S. Carretta, M. Amoretti·May 4, 2023
For most practical applications, quantum algorithms require large resources in terms of qubit number, much larger than those available with current noisy intermediate-scale quantum processors. With the network and communication functionalities provid...
Fast, tunable, high fidelity cZ-gates between superconducting qubits with parametric microwave control of ZZ-coupling
X. Jin, K. Cicak, Z. Parrott +6 more·May 4, 2023
Future quantum information processors require tunable coupling architectures that can produce high fidelity logical gates between two or more qubits. Parametric coupling is a powerful technique for generating tunable interactions between many qubits....
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...
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...
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...
Blueprint of a Molecular Spin Quantum Processor
A. Chiesa, S. Roca, S. Chicco +6 more·May 2, 2023
The implementation of a universal quantum processor still poses fundamental issues related to error mitigation and correction, which demand to investigate also platforms and computing schemes alternative to the main stream. A possibility is offered b...
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 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...
Fast Quantum Gate Design with Deep Reinforcement Learning Using Real-Time Feedback on Readout Signals
E. Wright, Rog´erio de Sousa·May 2, 2023
The design of high-fidelity quantum gates is difficult because it requires the optimization of two competing effects, namely maximizing gate speed and minimizing leakage out of the qubit subspace. We propose a deep reinforcement learning algorithm th...
Super-compact universal quantum logic gates with inverse-designed elements
Lu He, Dongning Liu, Jingxing Gao +8 more·May 1, 2023
Integrated quantum photonic circuit is a promising platform for the realization of quantum information processing in the future. To achieve the large-scale quantum photonic circuits, the applied quantum logic gates should be as small as possible for ...