Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Equation of Motion with Orbital Optimization for Computing Molecular Properties in Near-Term Quantum Computing.
Phillip W K Jensen, E. Kjellgren, Peter Reinholdt +4 more·Dec 19, 2023
Determining the properties of molecules and materials is one of the premier applications of quantum computing. A major question in the field is how to use imperfect near-term quantum computers to solve problems of practical value. Inspired by the rec...
Autonomous stabilization with programmable stabilized state
Ziqian Li, Tanay Roy, Yao Lu +2 more·Dec 18, 2023
Reservoir engineering is a powerful technique to autonomously stabilize a quantum state. Traditional schemes involving multi-body states typically function for discrete entangled states. In this work, we enhance the stabilization capability to a cont...
QDA2: A principled approach to automatically annotating charge stability diagrams
Brian Weber, J. P. Zwolak·Dec 18, 2023
Gate-defined semiconductor quantum dot (QD) arrays are a promising platform for quantum computing. However, presently, the large configuration spaces and inherent noise make tuning of QD devices a nontrivial task and with the increasing number of QD ...
Resonator-qutrit quantum battery
Fanghui Yang, Fu-Quan Dou·Dec 18, 2023
Quantum batteries (QBs) are energy storage and transfer microdevices that open up new possibilities in energy technology. Here, we derive a resonator-qutrits quantum battery (QB) model consisting of a multi-modes resonator and $N$ superconducting tra...
Error-corrected Hadamard gate simulated at the circuit level
G. P. Gehér, Campbell McLauchlan, Earl T. Campbell +2 more·Dec 18, 2023
We simulate the logical Hadamard gate in the surface code under a circuit-level noise model, compiling it to a physical circuit on square-grid connectivity hardware. Our paper is the first to do this for a logical unitary gate on a quantum error-corr...
Harnessing Inherent Noises for Privacy Preservation in Quantum Machine Learning
Keyi Ju, Xiaoqi Qin, Hui Zhong +3 more·Dec 18, 2023
Quantum computing revolutionizes the way of solving complex problems and handling vast datasets, which shows great potential to accelerate the machine learning process. However, data leakage in quantum machine learning (QML) may present privacy risks...
Submicrosecond high-fidelity dispersive readout of a spin qubit with squeezed photons
Chon‐Fai Kam, Xuedong Hu·Dec 17, 2023
Fast and high-fidelity qubit measurement is essential for realizing quantum error correction, which is in turn a key ingredient to universal quantum computing. For electron spin qubits, fast readout is one of the significant road blocks toward error ...
Demonstration of Fault-Tolerant Steane Quantum Error Correction
L. Postler, Friederike Butt, Ivan Pogorelov +7 more·Dec 15, 2023
Encoding information redundantly using quantum error-correcting (QEC) codes allows one to overcome the inherent sensitivity to noise in quantum computers to ultimately achieve large-scale quantum computation. The Steane QEC method involves preparing ...
Making the zeroth-order process fidelity independent of state preparation and measurement errors
Yu-Hao Chen, Renata Wong, Hsi-Sheng Goan·Dec 14, 2023
In this work, we demonstrate that the zero-fidelity, an approximation to the process fidelity, when combined with randomized benchmarking, becomes robust to state preparation and measurement (SPAM) errors. However, as randomized benchmarking requires...
Quantum topological data analysis via the estimation of the density of states
Stefano Scali, Chukwudubem Umeano, O. Kyriienko·Dec 12, 2023
We develop a quantum topological data analysis (QTDA) protocol based on the estimation of the density of states (DOS) of the combinatorial Laplacian. Computing topological features of graphs and simplicial complexes is crucial for analyzing data sets...
Accurate optimal quantum error correction thresholds from coherent information
Luis Colmenarez, Ze-Min Huang, Sebastian Diehl +1 more·Dec 11, 2023
Quantum error correcting (QEC) codes protect quantum information from decoherence as long as error rates fall below critical error thresholds. In general, obtaining thresholds implies simulating the QEC procedure using, in general, suboptimal decodin...
Dephasing due to electromagnetic interactions in spatial qubits
M. Schut, Herre Bosma, Meng-Zhi Wu +3 more·Dec 9, 2023
Matter-wave interferometers with micro-particles will enable the next generation of quantum sensors to probe minute quantum phase information. Therefore, estimating the loss of coherence and the degree of entanglement degradation for such interferome...
Enhancing the electron pair approximation with measurements on trapped-ion quantum computers
Luning Zhao, Q. Wang, Joshua J. Goings +5 more·Dec 9, 2023
The electron pair approximation offers an efficient variational quantum eigensolver (VQE) approach for chemistry simulations on quantum computers. With the number of entangling gates scaling quadratically with system size and a constant measurement o...
Robust entanglement buffers based on SWAP interactions
Ye-Chao Liu, Otfried Gühne, Stefan Nimmrichter·Dec 8, 2023
Quantum entanglement is the essential resource for quantum communication and distributed information processing in a quantum network. However, the remote generation over a network suffers from inevitable transmission loss and other technical difficul...
Global variational quantum circuits for arbitrary symmetric state preparation
Liam J. Bond, Matthew J. Davis, Jiří Minář +3 more·Dec 8, 2023
Quantum states that are symmetric under particle exchange play a crucial role in fields such as quantum metrology and quantum error correction. We use a variational circuit composed of global one-axis twisting and global rotations to efficiently prep...
Comparative study on compact quantum circuits of hybrid quantum-classical algorithms for quantum impurity models
Rihito Sakurai, Oliver J. Backhouse, George H Booth +2 more·Dec 7, 2023
Predicting the properties of strongly correlated materials is a significant challenge in condensed matter theory. The widely used dynamical mean-field theory faces difficulty in solving quantum impurity models numerically. Hybrid quantum--classical a...
Fault-Tolerant One-Way Noiseless Amplification for Microwave Bosonic Quantum Information Processing
Hany Khalifa, Riku Jäntti, G. Paraoanu·Dec 7, 2023
Microwave quantum information networks require reliable transmission of single-photon propagating modes over lossy channels. In this article, we propose a microwave noiseless linear amplifier (NLA) suitable to circumvent the losses incurred by a flyi...
Resource-Efficient Quantum Circuits for Molecular Simulations: A Case Study of Umbrella Inversion in Ammonia
R. NirmalM., S. Yamijala, Kalpak Ghosh +2 more·Dec 7, 2023
We conducted a thorough evaluation of various state-of-the-art strategies to prepare the ground state wavefunction of a system on a quantum computer, specifically within the framework of variational quantum eigensolver (VQE). Despite the advantages o...
Counting collisions in random circuit sampling for benchmarking quantum computers
Andrea Mari·Dec 7, 2023
We show that counting the number of collisions (re-sampled bitstrings) when measuring a random quantum circuit provides a practical benchmark for the quality of a quantum computer and a quantitative noise characterization method. We analytically esti...
Solving the Lipkin model using quantum computers with two qubits only with a hybrid quantum-classical technique based on the generator coordinate method
Yann Beaujeault-Taudière, Denis Lacroix·Dec 7, 2023
The possibility of using the generator coordinate method (GCM) using hybrid quantum-classical algorithms with reduced quantum resources is discussed. The task of preparing the basis states and calculating the various kernels involved in the GCM is as...