Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient techniques to GPU Accelerations of Multi-Shot Quantum Computing Simulations
J. Doi, H. Horii, Christopher Wood·Aug 7, 2023
Quantum computers are becoming practical for computing numerous applications. However, simulating quantum computing on classical computers is still demanding yet useful because current quantum computers are limited because of computer resources, hard...
Noise-Aware Variational Eigensolvers: A Dissipative Route for Lattice Gauge Theories
Jesús Cobos, David F. Locher, A. Bermudez +2 more·Aug 7, 2023
We propose a novel variational ansatz for the ground-state preparation of the Z2 lattice gauge theory (LGT) in quantum simulators. It combines dissipative and unitary operations in a completely deterministic scheme with a circuit depth that does not ...
Hamiltonian dynamics on digital quantum computers without discretization error
Etienne Granet, Henrik Dreyer·Aug 7, 2023
We introduce an algorithm to compute expectation values of time-evolved observables on digital quantum computers that requires only bounded average circuit depth to reach arbitrary precision, i.e. produces an unbiased estimator with finite average de...
Advances in bosonic quantum error correction with Gottesman–Kitaev–Preskill Codes: Theory, engineering and applications
Anthony J. Brady, A. Eickbusch, Shraddha Singh +2 more·Aug 5, 2023
Encoding quantum information into a set of harmonic oscillators is considered a hardware efficient approach to mitigate noise for reliable quantum information processing. Various codes have been proposed to encode a qubit into an oscillator -- includ...
Q-Pandora Unboxed: Characterizing Resilience of Quantum Error Correction Codes Under Biased Noise
Avimita Chatterjee, Subrata Das, Swaroop Ghosh·Aug 5, 2023
Quantum error correction codes (QECCs) are essential for reliable quantum computing as they protect quantum states against noise and errors. Limited research has explored the resilience of QECCs to biased noise, critical for selecting optimal codes. ...
Variational quantum algorithm for experimental photonic multiparameter estimation
V. Cimini, M. Valeri, S. Piacentini +5 more·Aug 4, 2023
Variational quantum metrology represents a powerful tool to optimize estimation strategies, resulting particularly beneficial for multiparameter estimation problems that often suffer from limitations due to the curse of dimensionality and computation...
Correcting biased noise using Gottesman-Kitaev-Preskill repetition code with noisy ancilla
Zhifei Li, D. Su·Aug 3, 2023
Concatenation of a bosonic code with a qubit code is one of the promising ways to achieve fault-tolerant quantum computation. As one of the most important bosonic codes, Gottesman-Kitaev-Preskill (GKP) code is proposed to correct small displacement e...
Dissipative Dynamics of Graph-State Stabilizers with Superconducting Qubits.
Liran Shirizly, G. Misguich, H. Landa·Aug 3, 2023
We study experimentally and numerically the noisy evolution of multipartite entangled states, focusing on superconducting qubit devices accessible via the cloud. We find that a valid modeling of the dynamics requires one to properly account for coher...
Performance Analysis of Satellite-Based QKD Protocols
Muskan, Ramniwas Meena, Subhashish Banerjee·Aug 2, 2023
Satellite-based free-space quantum key distribution (QKD) provides a practical framework for achieving secure global communication beyond the limitations of optical fibers. In this work, the quantum bit error rate (QBER) and secure key rate of four r...
Lie-algebraic classical simulations for quantum computing
Matthew L. Goh, Martín Larocca, L. Cincio +2 more·Aug 2, 2023
The classical simulation of quantum dynamics plays an important role in our understanding of quantum complexity, and in the development of quantum technologies. Efficient techniques such as those based on the Gottesman-Knill theorem for Clifford circ...
Multi-time quantum process tomography on a superconducting qubit
Christina Giarmatzi, Tyler Jones, Alexei Gilchrist +3 more·Aug 1, 2023
Current quantum technologies are at the cusp of becoming useful, but still face formidable obstacles such as noise. Noise severely limits the ability to scale quantum devices to the point that they would offer an advantage over classical devices. To ...
Quantum error correction with an Ising machine under circuit-level noise
J. Fujisaki, Kazunori Maruyama, H. Oshima +4 more·Aug 1, 2023
Efficient decoding to estimate error locations from outcomes of syndrome measurement is the prerequisite for quantum error correction. Decoding in presence of circuit-level noise including measurement errors should be considered in case of actual qua...
Scalable quantum measurement error mitigation via conditional independence and transfer learning
Chang-Woo Lee, D. Park·Aug 1, 2023
Mitigating measurement errors in quantum systems without relying on quantum error correction is of critical importance for the practical development of quantum technology. Deep learning-based quantum measurement error mitigation (QMEM) has exhibited ...
Quantum simulation of Pauli channels and dynamical maps: Algorithm and implementation
Tomas Basile, C. Pineda·Jul 31, 2023
Pauli channels are fundamental in the context of quantum computing as they model the simplest kind of noise in quantum devices. We propose a quantum algorithm for simulating Pauli channels and extend it to encompass Pauli dynamical maps (parametrized...
An entanglement-aware quantum computer simulation algorithm
M. Oliva·Jul 31, 2023
The advent of quantum computers promises exponential speed ups in the execution of various computational tasks. While their capabilities are hindered by quantum decoherence, they can be exactly simulated on classical hardware at the cost of an expone...
Robust Estimation of the Quantum Fisher Information on a Quantum Processor
Vittorio Vitale, A. Rath, P. Jurcevic +3 more·Jul 31, 2023
We present the experimental measurement, on a quantum processor, of a series of polynomial lower bounds that to the quantum Fisher information (QFI), a fundamental quantity for certifying multipartite entanglement that is useful for metrological appl...
The Impact of Quantum Memory Quality on Entanglement Assisted Communication
Stephen Diadamo, Janis Noetzel·Jul 29, 2023
This work explores entanglement-assisted communication, where quantum entanglement resources enable the transmission of classical information at an enhanced rate. We consider a scenario where entanglement is distributed ahead of time based on network...
Decoding algorithms for surface codes
Antonio deMarti iOlius, Patricio Fuentes, Rom'an Or'us +2 more·Jul 27, 2023
Quantum technologies have the potential to solve certain computationally hard problems with polynomial or super-polynomial speedups when compared to classical methods. Unfortunately, the unstable nature of quantum information makes it prone to errors...
Factory-based fault-tolerant preparation of quantum polar codes encoding one logical qubit
Ashutosh Goswami, M. Mhalla, Valentin Savin·Jul 27, 2023
A fault-tolerant way to prepare logical code-states of Q1 codes, i.e., quantum polar codes encoding one qubit, has been recently proposed. The fault tolerance therein is guaranteed by an error detection gadget, where if an error is detected during th...
Decoherence of a tunable capacitively shunted flux qubit
R. Trappen, X. Dai, M. A. Yurtalan +19 more·Jul 26, 2023
Quantum annealing is a method to solve optimization problems that leverages quantum tunneling in a coupled qubit system. We present a detailed study of the coherence of a tunable capacitively-shunted flux qubit, designed for coherent quantum annealin...