Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Single photonic qutrit in a collective Rydberg polariton
Y. Jiao, Oliver D. W. Hughes, Max Z. Festenstein +5 more·Dec 4, 2024
Qutrit with highly efficient algorithms and security is imperative in quantum information processing. Here, we demonstrate for the first time the coherent creation, control, and readout of a single photonic qutrit in a cold Rydberg ensemble. In each ...
Learning Feedback Mechanisms for Measurement-Based Variational Quantum State Preparation
D. Puente, Matteo Rizzi·Nov 29, 2024
This work introduces a self-learning protocol that incorporates measurement and feedback into variational quantum circuits for efficient quantum state preparation. By combining projective measurements with conditional feedback, the protocol learns st...
Information geometry of bosonic Gaussian thermal states
Zixin Huang, Mark M. Wilde·Nov 27, 2024
Bosonic Gaussian thermal states form a fundamental class of states in quantum information science. This paper explores the information geometry of these states, focusing on characterizing the distance between two nearby states and the geometry induce...
Continuous Automatic Polarization Channel Stabilization from Heterodyne Detection of Coexisting Dim Reference Signals
Joseph C. Chapman, M. Alshowkan, K. Reaz +2 more·Nov 22, 2024
Quantum networking continues to encode information in polarization states due to ease and precision. The variable environmental polarization transformations induced by deployed fiber need correction for deployed quantum networking. Here we present a ...
Entanglement teleportation along a regenerating hamster-wheel graph state
Haiyue Kang, John F. Kam, Gary J. Mooney +1 more·Nov 20, 2024
We present an efficient and reusable approach to quantum teleportation that allows cyclic teleportation of a two-qubit graph state around a quantum hamster wheel—a ring of qubits entangled as a one-dimensional line prepared on the 20-qubit Quantinuum...
Reinforced Disentanglers on Random Unitary Circuits
Ning Bao, Keiichiro Furuya, Gun Suer·Nov 14, 2024
We search for efficient disentanglers on random Clifford circuits of two-qubit gates arranged in a brick-wall pattern, using the proximal policy optimization (PPO) algorithm \cite{schulman2017proximalpolicyoptimizationalgorithms}. Disentanglers are d...
Cavity-Vacuum-Induced Chiral Spin Liquids in Kagome Lattices: Tuning and Probing Topological Quantum Phases via Cavity Quantum Electrodynamics
Chenan Wei, Liu Yang, Qing-Dong Jiang·Nov 12, 2024
Topological phases in frustrated quantum magnetic systems have captivated researchers for decades, with the chiral spin liquid (CSL) standing out as one of the most compelling examples. Featured by long-range entanglement, topological order, and exot...
Infinitely fast critical dynamics: Teleportation through temporal rare regions in monitored quantum circuits
Gal Shkolnik, Sarang Gopalakrishnan, David A. Huse +2 more·Nov 5, 2024
We consider measurement-induced phase transitions in monitored quantum circuits with a measurement rate that fluctuates in time, remaining spatially uniform at each time. The spatially correlated fluctuations in the measurement rate disrupt the volum...
Quantum Carleman linearization efficiency in nonlinear fluid dynamics
Javier Gonzalez-Conde, D. Lewis, Sachin S. Bharadwaj +1 more·Oct 30, 2024
Computational fluid dynamics (CFD) is a specialized branch of fluid mechanics that utilizes numerical methods and algorithms to solve and analyze fluid-flow problems. One promising avenue to enhance CFD is the use of quantum computing, which has the ...
Measurement-Induced Entanglement and Complexity in Random Constant-Depth 2D Quantum Circuits
Max McGinley, Wen Wei Ho, D. Malz·Oct 30, 2024
We analyze the entanglement structure of states generated by random constant-depth two-dimensional quantum circuits, followed by projective measurements of a subset of sites. By deriving a rigorous lower bound on the average entanglement entropy of s...
Quantum simulation of the microscopic to macroscopic crossover using superconducting quantum impurities
A. Burshtein, Moshe Goldstein·Oct 29, 2024
Despite being a pillar of quantum mechanics, little attention has been paid to the onset of Fermi's golden rule as a discrete microscopic bath of modes approaches the macroscopic thermodynamic limit and forms a continuum. Motivated by recent experime...
Sample-Optimal Quantum Estimators for Pure-State Trace Distance and Fidelity via Samplizer
Qisheng Wang, Zhicheng Zhang·Oct 28, 2024
Trace distance and infidelity (induced by square root fidelity), as basic measures of the closeness of quantum states, are commonly used in quantum state discrimination, certification, and tomography. However, the sample complexity for their estimati...
Characterization of Noise using variants of Unitarity Randomized Benchmarking
A. Chandrashekar, Soumya Das, Goutam Paul·Oct 27, 2024
Benchmarking of noise that is induced during the implementation of quantum gates is the main concern for practical quantum computers. Several protocols have been proposed that empirically calculate various metrics that quantify the error rates of the...
Method for noise-induced regularization in quantum neural networks
Viacheslav Kuzmin, Wilfrid Somogyi, Ekaterina Pankovets +1 more·Oct 25, 2024
In the current quantum computing paradigm, significant focus is placed on the reduction or mitigation of quantum decoherence. When designing new quantum processing units, the general objective is to reduce the amount of noise qubits are subject to, a...
Measuring error rates of mid-circuit measurements
Daniel Hothem, Jordan Hines, Charles Baldwin +3 more·Oct 22, 2024
High-fidelity mid-circuit measurements, which read out the state of specific qubits in a multiqubit processor without destroying them or disrupting their neighbors, are a critical component for useful quantum computing. They enable fault-tolerant qua...
Observable measurement-induced transitions
Aleksei Khindanov, I. Aleiner, L. Faoro +1 more·Oct 12, 2024
One of the main postulates of quantum mechanics is that measurements destroy quantum coherence (wave function collapse). Recently it was discovered that in a many-body system dilute local measurements still preserve some coherence across the entire s...
Observation of disorder-free localization using a (2+1)D lattice gauge theory on a quantum processor
Gaurav Gyawali, Shashwat Kumar, Y. Lensky +219 more·Oct 8, 2024
Disorder-induced phenomena in quantum many-body systems pose significant challenges for analytical methods and numerical simulations at relevant time and system scales. To reduce the cost of disorder-sampling, we investigate quantum circuits initiali...
Competing automorphisms and disordered Floquet codes
Cory T. Aitchison, Benjamin B'eri·Oct 3, 2024
Topological order is a promising basis for quantum error correction, a key milestone towards large-scale quantum computing. Floquet codes provide a dynamical scheme for this while also exhibiting Floquet-enriched topological order where anyons period...
Flux-pump induced degradation of $T_1$ for dissipative cat qubits
Léon Carde, Pierre Rouchon, Joachim Cohen +1 more·Oct 1, 2024
Dissipative stabilization of cat qubits autonomously corrects for bit flip errors by ensuring that reservoir-engineered two-photon losses dominate over other mechanisms inducing phase flip errors. To describe the latter, we derive an effective master...
Digital simulation of zero-temperature spontaneous symmetry breaking in a superconducting lattice processor
Chang-Kang Hu, Guixu Xie, Kasper Poulsen +11 more·Sep 26, 2024
Quantum simulators are ideal platforms to investigate quantum phenomena that are inaccessible through conventional means, such as the limited resources of classical computers to address large quantum systems or due to constraints imposed by fundament...