Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
A full circuit-based quantum algorithm for excited-states in quantum chemistry
Jingwei Wen, Zheng-an Wang, Chi-Tong Chen +7 more·Dec 28, 2021
Utilizing quantum computer to investigate quantum chemistry is an important research field nowadays. In addition to the ground-state problems that have been widely studied, the determination of excited-states plays a crucial role in the prediction an...
Quantum dynamics simulations beyond the coherence time on noisy intermediate-scale quantum hardware by variational Trotter compression
Noah F. Berthusen, T. V. Trevisan, T. Iadecola +1 more·Dec 23, 2021
We demonstrate a post-quench dynamics simulation of a Heisenberg model on present-day IBM quantum hardware that extends beyond the coherence time of the device. This is achieved using a hybrid quantum-classical algorithm that propagates a state using...
Shortcuts to the quantum approximate optimization algorithm
Yahui Chai, Yongjian Han, Yuchun Wu +3 more·Dec 21, 2021
The Quantum Approximate Optimization Algorithm (QAOA) is a quantum-classical hybrid algorithm intending to find the ground state of a target Hamiltonian. Theoretically, QAOA can obtain the approximate solution if the quantum circuit is deep enough. A...
Variational Quantum‐Neural Hybrid Error Mitigation
Shi-Xin Zhang, Z. Wan, Chang-Yu Hsieh +2 more·Dec 20, 2021
Quantum error mitigation (QEM) is crucial for obtaining reliable results on quantum computers by suppressing quantum noise with moderate resources. It is a key factor for successful and practical quantum algorithm implementations in the noisy interme...
A χ²-based AlGaAs Phase Sensitive Amplifier with Record Gain, Noise and Sensitivity
Zhizhong Yan, Haoyu He, Han Liu +7 more·Dec 20, 2021
Phase sensitive amplifiers (PSAs) have the potential to empower substantial advances in emerging generations of optical communication systems as well as classical and quantum on-chip signal processing. While the second order nonlinearity (χ2) is stro...
Measurement-based generation and preservation of cat and grid states within a continuous-variable cluster state
M. Eaton, C. González-Arciniegas, R. N. Alexander +2 more·Dec 20, 2021
We present an algorithm to reliably generate various quantum states critical to quantum error correction and universal continuous-variable (CV) quantum computing, such as Schrödinger cat states and Gottesman-Kitaev-Preskill (GKP) grid states, out of ...
Mitigation of Crosstalk Errors in a Quantum Measurement and Its Applications
Seungchan Seo, J. Seong, J. Bae·Dec 20, 2021
In practical realizations of quantum information processing, there may exist noise in a measurement readout stage where errors appear not only on individual qubits but also on multiple ones collectively, the latter of which is called crosstalk errors...
On Variable Strength Quantum ECC
Salonik Resch, Ulya R. Karpuzcu·Dec 19, 2021
Quantum error correcting codes (QECC) facilitate timely detection and correction of errors to increase the robustness of qubits. Higher expected error rates necessitate stronger (i.e., larger-distance) QECC to guarantee correct operation. With increa...
Quantum phase modulation with acoustic cavities and quantum dots
Poolad Imany, Zixuan Wang, Ryan A. Decrescent +8 more·Dec 17, 2021
Fast, efficient, and low power modulation of light at microwave frequencies is crucial for chip-scale classical and quantum processing as well as for long-range networks of superconducting quantum processors. A successful approach to bridge the gap b...
Performance evaluations of signed and unsigned noisy approximate quantum Fourier arithmetic
R. Basili, W. Qian, S. Sarker +6 more·Dec 17, 2021
The Quantum Fourier Transform (QFT) grants competitive advantages, especially in resource usage and circuit approximation, for performing arithmetic operations on quantum computers, and offers a potential route toward a numerical quantum-computationa...
Quantum Computer Benchmarking via Quantum Algorithms
K. Georgopoulos, C. Emary, P. Zuliani·Dec 17, 2021
We present a framework that utilizes quantum algorithms, an architecture aware quantum noise model and an ideal simulator to benchmark quantum computers. The benchmark metrics highlight the difference between the quantum computer evolution and the si...
Rescaling decoder for two-dimensional topological quantum color codes on 4.8.8 lattices
Pedro Parrado-Rodríguez, M. Rispler, Markus P. Müller·Dec 17, 2021
Fault-tolerant quantum computation relies on scaling up quantum error correcting codes in order to suppress the error rate on the encoded quantum states. Topological codes, such as the surface code or color codes are leading candidates for practical ...
Deterministic and Universal Quantum Squeezing Gate with a Teleportation‐Like Protocol
Xiaocong Sun, Yajun Wang, Yuhang Tian +4 more·Dec 17, 2021
Squeezing transformation as an essential component of quantum information processing, gives rise to the possibility to perform various tasks such as distributed quantum computation and the quantum‐logic gate. However, the reported squeezing gate with...
Kernel Matrix Completion for Offline Quantum-Enhanced Machine Learning
Annie Naveh, Imogen Fitzgerald, A. Phan +2 more·Dec 15, 2021
Enhancing classical machine learning (ML) algorithms through quantum kernels is a rapidly growing research topic in quantum machine learning (QML). A key challenge in using kernels -- both classical and quantum -- is that ML workflows involve acquiri...
Dynamical approach to improving Majorana qubits and distinguishing them from trivial bound states
Brett Min, Bastien Fajardo, T. Pereg-Barnea +1 more·Dec 15, 2021
We study a series of dynamical protocols which involve periodically driving a quantum dot coupled to a putative nanowire hosting Majorana zero modes (MZMs) to i) reduce the hybridization between MZMs, ii) improve the coherence of the Majorana qubit w...
Quantum computing for lattice supersymmetry
C. Culver, D. Schaich·Dec 14, 2021
Quantum computing promises the possibility of studying the real-time dynamics of nonperturbative quantum field theories while avoiding the sign problem that obstructs conventional lattice approaches. Current and near-future quantum devices are severe...
Multistate transition dynamics by strong time-dependent perturbation in NISQ era
Yulun Wang, P. Krstic·Dec 13, 2021
We develop a quantum computing scheme utilizing McLachlan variational principle in a hybrid quantum–classical algorithm to accurately calculate the transition dynamics of a closed quantum system with many excited states subject to a strong time-depen...
Error statistics and scalability of quantum error mitigation formulas
Dayue Qin, Yanzhu Chen, Ying Li·Dec 12, 2021
Quantum computing promises advantages over classical computing in many problems. Nevertheless, noise in quantum devices prevents most quantum algorithms from achieving the quantum advantage. Quantum error mitigation provides a variety of protocols to...
Quantum Gaussian filter for exploring ground-state properties
Mingjun He, Dan-Bo Zhang, Z. D. Wang·Dec 11, 2021
Filter methods realize a projection from a superposed quantum state onto a target state, which can be efficient if two states have sufficient overlap. Here we propose a quantum Gaussian filter (QGF) with the filter operator being a Gaussian function ...
VAQEM: A Variational Approach to Quantum Error Mitigation
Gokul Subramanian Ravi, Kaitlin N. Smith, P. Gokhale +4 more·Dec 10, 2021
Variational Quantum Algorithms (VQA) are one of the most promising candidates for near-term quantum advantage. Traditionally, these algorithms are parameterized by rotational gate angles whose values are tuned over iterative execution on quantum mach...