Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Reducing the Sampling Complexity of Energy Estimation in Quantum Many-Body Systems Using Empirical Variance Information
Alexander Gresch, Uğur Tepe, M. Kliesch·Feb 3, 2025
We consider the problem of estimating the energy of a quantum state preparation for a given Hamiltonian in Pauli decomposition. For various quantum algorithms, in particular in the context of quantum chemistry, it is crucial to have energy estimates ...
Postselection-free experimental observation of the measurement-induced phase transition in circuits with universal gates
Xiaozhou Feng, Jeremy Cot'e, S. Kourtis +1 more·Feb 3, 2025
Monitored many-body systems can exhibit a phase transition between entangling and disentangling dynamical phases by tuning the strength of measurements made on the system as it evolves. This phenomenon is called the measurement-induced phase transiti...
Expedited Noise Spectroscopy of Transmon Qubits
Bhavesh Gupta, V. Joshi, Udit Kandpal +3 more·Feb 2, 2025
There has been tremendous progress in the physical implementation of quantum protocols in recent times, bringing us closer than ever to realizing the promise of quantum computing. However, environmental noise continues to pose a crucial challenge to ...
On Multiquantum Bits, Segre Embeddings and Coxeter Chambers
N. Combe·Feb 1, 2025
This work explores the interplay between quantum information theory, algebraic geometry, and number theory, with a particular focus on multiqubit systems, their entanglement structure, and their classification via geometric embeddings. The Segre embe...
Stress accommodation in nanoscale dolan bridges designed for superconducting qubits
Sueli Skinner-Ramos, Matthew L. Freeman, Douglas Pete +3 more·Feb 1, 2025
Josephson junctions are the principal circuit element in numerous superconducting quantum information devices and can be readily integrated into large-scale electronics. However, device integration at the wafer scale necessarily depends on having a r...
From Bits to Qubits: Challenges in Classical-Quantum Integration
S. Kulkarni, Daniel Huang, E. .. Bethel·Jan 31, 2025
While quantum computing holds immense potential for tackling previously intractable problems, its current practicality remains limited. A critical aspect of realizing quantum utility is the ability to efficiently interface with data from the classica...
Digital Quantum Simulations of the Non-Resonant Open Tavis-Cummings Model
Aidan N. Sims, Dhrumil Patel, Aby Philip +4 more·Jan 30, 2025
The open Tavis--Cummings model consists of $N$ quantum emitters interacting with a common cavity mode, accounts for losses and decoherence, and is frequently explored for quantum information processing and designing quantum devices. As $N$ increases,...
Limits of Information Flow Between Classically Interacting Particles
Miles D. Miller-Dickson, Christopher Rose·Jan 30, 2025
Pinning down a precise understanding of information flow within physical interactions remains a central concern to fields like stochastic thermodynamics and quantum information science. In both spheres a careful accounting of bits (or qubits) enables...
Real-time adaptation of quantum noise channel estimates
L. Daguerre, M. Sarovar·Jan 30, 2025
Estimates of noise channels for quantum gates are required for most error mitigation techniques and are desirable for informing quantum error correction decoders. These estimates can be obtained by resource-intensive off-line characterization techniq...
Hierarchical generation and design of quantum codes for resource-efficient loss-tolerant quantum communications
Franceso Cesa, Tommaso Feri, A. Bassi·Jan 30, 2025
We develop novel protocols for generating loss-tolerant quantum codes; these are central for safeguarding information against qubit losses, with most crucial applications in quantum communications. Contrary to current proposals, our method enables to...
QNN-QRL: Quantum Neural Network Integrated with Quantum Reinforcement Learning for Quantum Key Distribution
B. Behera, S. Al-kuwari, Ahmed Farouk·Jan 30, 2025
Quantum key distribution (QKD) has emerged as a critical component of secure communication in the quantum era, ensuring information-theoretic security. Despite its potential, there are issues in optimizing key generation rates, enhancing security, an...
Dephasing-induced leakage in multi-level superconducting quantum circuits
F. Strauch·Jan 28, 2025
Superconducting quantum circuits, such as the transmon, have multiple quantum states beyond the computational subspace. These states can be populated during quantum logic operations; residual population in such states is known as leakage. While contr...
Two measurement bases are asymptotically informationally complete for any pure state tomography
Tianfeng Feng, Tianqi Xiao, Yu Wang +6 more·Jan 28, 2025
One of the fundamental questions in quantum information theory is to find how many measurement bases are required to obtain the full information of a quantum state. While a minimum of four measurement bases is typically required to determine an arbit...
Crosstalk analysis in single hole-spin qubits within highly anisotropic g-tensors
Yaser Hajati, Irina Heinz, G. Burkard·Jan 27, 2025
Spin qubits based on valence band hole states are highly promising for quantum information processing due to their strong spin-orbit coupling and ultrafast operation speed. As these systems scale up, achieving high-fidelity single-qubit operations be...
Exponential Improvement on Asian Option Pricing Through Quantum Preconditioning Methods
Gumaro Rendon, Rutuja Kshirsagar, Q. Tran·Jan 26, 2025
In this work, we present a quantum algorithm designed to solve the differential equation used in the pricing of Asian options, in the framework of the Black-Scholes model. Our approach modifies an existing quantum pre-conditioning method (different f...
Uncertainty relations between quantum Fisher information and entanglement monotones
Shaowei Du, Shuheng Liu, Matteo Fadel +2 more·Jan 24, 2025
Entanglement is widely regarded as an essential resource for a number of tasks and can in some cases be quantified by figures of merit related to those tasks. In quantum metrology, this is showcased by the connections between the quantum Fisher infor...
End-to-End Workflow for Machine-Learning-Based Qubit Readout With QICK and hls4ml
G. D. Guglielmo, Botao Du, Javier Campos +10 more·Jan 24, 2025
In this article, we present an end-to-end workflow for superconducting qubit readout that embeds codesigned neural networks into the quantum instrumentation control kit (QICK). Capitalizing on the custom firmware and software of the QICK platform, wh...
Error-mitigated geometric quantum control over an oscillator
M. Liang, Tao Chen, Zheng-Yuan Xue·Jan 24, 2025
Quantum information is very fragile to environmentally and operationally induced imperfections. Therefore, the construction of practical quantum computers requires quantum error-correction techniques to protect quantum information. In particular, enc...
Tensor-Based Binary Graph Encoding for Variational Quantum Classifiers
Shiwen An, Konstantinos Slavakis·Jan 24, 2025
Quantum computing has been a prominent research area for decades, inspiring transformative fields such as quantum simulation, quantum teleportation, and quantum machine learning (QML), which are undergoing rapid development. Within QML, hybrid classi...
Symmetric tensor scars with tunable entanglement from volume to area law
Bhaskar Mukherjee, Christopher J. Turner, Marcin Szyniszewski +1 more·Jan 23, 2025
Teleportation of quantum information over long distances requires robust entanglement on the macroscopic scale. The construction of highly energetic eigenstates with tunable long-range entanglement can provide a new medium for information transmissio...