Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,144 papers in 12 months (-14% vs prior quarter)
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Hardware platform mentions in abstracts — Photonic leads
The Fate of Entanglement
Gilles Parez, William Witczak-Krempa·Feb 7, 2024
Quantum entanglement manifests itself in non-local correlations between the constituents of a system. In its simplest realization, a measurement on one subsystem is affected by a prior measurement on its partner, irrespective of their separation. For...
Using Bifluxon Tunneling to Protect the Fluxonium Qubit
Waël Ardati, S'ebastien L'eger, Shelender Kumar +8 more·Feb 7, 2024
Encoding quantum information in quantum states with disjoint wave-function support and noise-insensitive energies is the key behind the idea of qubit protection. While fully protected qubits are expected to offer exponential protection against both e...
Weight-Reduced Stabilizer Codes with Lower Overhead
Eric Sabo, Lane G. Gunderman, Benjamin Ide +2 more·Feb 7, 2024
Stabilizer codes are the most widely studied class of quantum error-correcting codes and form the basis of most proposals for a fault-tolerant quantum computer. A stabilizer code is defined by a set of parity-check operators, which are measured in or...
Distinguishing pure and thermal states by Landauer’s principle in open systems
Hao Xu·Feb 7, 2024
Starting from Polchinski’s thought experiment on how to distinguish between pure and thermal states, we construct a specific system to study the interaction between qubit and cavity quantum field theory (QFT) in order to provide a more operational po...
Quantum circuit for multi-qubit Toffoli gate with optimal resource
Junhong Nie, Wei Zi, Xiaoming Sun·Feb 7, 2024
Resource consumption is an important issue in quantum information processing, particularly during the present NISQ era. In this paper, we investigate resource optimization of implementing multiple controlled operations, which are fundamental building...
Continuous-Variable Quantum Key Distribution with key rates far above the PLOB bound
A. Ray, Boris Škorić·Feb 7, 2024
Continuous-Variable Quantum Key Distribution (CVQKD) at large distances has such high noise levels that the error-correcting code must have very low rate. In this regime it becomes feasible to implement random-codebook error correction, which is know...
Monitoring the Energy of a Cavity by Observing the Emission of a Repeatedly Excited Qubit.
Hector Hutin, Antoine Essig, R. Assouly +3 more·Feb 7, 2024
The number of excitations in a large quantum system (harmonic oscillator or qudit) can be measured in a quantum nondemolition manner using a dispersively coupled qubit. It typically requires a series of qubit pulses that encode various binary questio...
Quantum Tensor-Product Decomposition from Choi-State Tomography
Refik Mansuroglu, Arsalan Adil, Michael J. Hartmann +2 more·Feb 7, 2024
The Schmidt decomposition is the go-to tool for measuring bipartite entanglement of pure quantum states. Similarly, it is possible to study the entangling features of a quantum operation using its operator-Schmidt or tensor-product decomposition. Whi...
Challenges and opportunities in the supervised learning of quantum circuit expectation values.
S. Cantori, S. Pilati·Feb 7, 2024
Recently, deep neural networks have been proven capable of predicting output expectation values of certain random quantum circuits via a supervised learning approach. Here we investigate the potential of this possible approach to the emulation of qua...
Batched Line Search Strategy for Navigating through Barren Plateaus in Quantum Circuit Training
Jakab N'adori, Gregory Morse, Barna Fulop Vill'am +3 more·Feb 7, 2024
Variational quantum algorithms are viewed as promising candidates for demonstrating quantum advantage on near-term devices. These approaches typically involve the training of parameterized quantum circuits through a classical optimization loop. Howev...
Reducing two-level system dissipations in 3D superconducting Niobium resonators by atomic layer deposition and high temperature heat treatment
Y. Kalboussi, B. Delatte, S. Bira +16 more·Feb 6, 2024
Superconducting qubits have arisen as a leading technology platform for quantum computing which is on the verge of revolutionizing the world's calculation capacities. Nonetheless, the fabrication of computationally reliable qubit circuits requires in...
Preparing general mixed quantum states on quantum computers
Douglas F. Pinto, Lucas Friedrich, Jonas Maziero·Feb 6, 2024
The preparation of quantum states serves as a pivotal subroutine across various domains, including quantum communication protocols, quantum computing, and the exploration of quantum correlations and other resources within physical systems. Building u...
Reductive Quantum Phase Estimation
Nicholas J. C. Papadopoulos, J. T. Reilly, J. D. Wilson +1 more·Feb 6, 2024
Estimating a quantum phase is a necessary task in a wide range of fields of quantum science. To accomplish this task, two well-known methods have been developed in distinct contexts, namely, Ramsey interferometry (RI) in atomic and molecular physics ...
Robust projective measurements through measuring code-inspired observables
Yingkai Ouyang·Feb 6, 2024
Quantum measurements are ubiquitous in quantum information processing tasks, but errors can render their outputs unreliable. Here, we present a scheme that implements a robust projective measurement through measuring code-inspired observables. Namely...
Cosmic-ray-induced correlated errors in superconducting qubit array
Xue-Gang Li, Junhua Wang, Yao-Yao Jiang +15 more·Feb 6, 2024
Correlated errors may devastate quantum error corrections that are necessary for the realization of fault-tolerant quantum computation. Recent experiments with superconducting qubits indicate that they can arise from quasiparticle (QP) bursts induced...
Association between Prefrontal fNIRS signals during Cognitive tasks and College scholastic ability test (CSAT) scores: Analysis using a quantum annealing approach
Ye-eun Kim, Junggu Choi, Bora Kim +4 more·Feb 6, 2024
Academic achievement is a critical measure of intellectual ability, prompting extensive research into cognitive tasks as potential predictors. Neuroimaging technologies, such as functional near-infrared spectroscopy (fNIRS), offer insights into brain...
Geometric quantum machine learning of BQPA protocols and latent graph classifiers
Chukwudubem Umeano, V. Elfving, O. Kyriienko·Feb 6, 2024
Geometric quantum machine learning (GQML) aims to embed problem symmetries for learning efficient solving protocols. However, the question remains if (G)QML can be routinely used for constructing protocols with an exponential separation from classica...
Superconducting Qubits above 20 GHz Operating over 200 mK
Alexander Anferov, Shannon P. Harvey, Fanghui Wan +2 more·Feb 5, 2024
Current state-of-the-art superconducting microwave qubits are cooled to extremely low temperatures to avoid sources of decoherence. Higher qubit operating temperatures would significantly increase the cooling power available, which is desirable for s...
Fast classical simulation of Harvard/QuEra IQP circuits
Dmitri Maslov, S. Bravyi, Felix Tripier +2 more·Feb 5, 2024
Establishing an advantage for (white-box) computations by a quantum computer against its classical counterpart is currently a key goal for the quantum computation community. A quantum advantage is achieved once a certain computational capability of a...
Crosstalk Attacks and Defence in a Shared Quantum Computing Environment
B. Harper, Behnam Tonekaboni, Bahar Goldozian +2 more·Feb 5, 2024
Quantum computing has the potential to provide solutions to problems that are intractable on classical computers, but the accuracy of the current generation of quantum computers suffer from the impact of noise or errors such as leakage, crosstalk, de...