Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Full classification of Pauli Lie algebras
G. Aguilar, Simon Cichy, J. Eisert +1 more·Jul 31, 2024
Lie groups, and therefore Lie algebras, are fundamental structures in quantum physics that determine the space of possible trajectories of evolving systems. However, classification and characterization methods for these structures are often impractic...
Quantum Repeater Protocol for Deterministic Distribution of Macroscopic Entanglement
A. Pyrkov, I. D. Lazarev, Tim Byrnes·Jul 31, 2024
Distributing long‐distance entanglement is a fundamental goal that is necessary for a variety of tasks such as quantum communication, distributed quantum computing, and quantum metrology. Currently quantum repeater schemes typically aim to distribute...
Persistent Topological Negativity in a High-Temperature Mixed-State
Yonna Kim, A. Lavasani, Sagar Vijay·Jul 31, 2024
We study the entanglement structure of the Greenberger-Horne-Zeilinger (GHZ) state as it thermalizes under a strongly-symmetric quantum channel describing the Metropolis-Hastings dynamics for the $d$-dimensional classical Ising model at inverse tempe...
Real-time chiral dynamics at finite temperature from quantum simulation
Kazuki Ikeda, Zhong-Bo Kang, D. Kharzeev +2 more·Jul 31, 2024
In this study, we explore the real-time dynamics of the chiral magnetic effect (CME) at a finite temperature in the (1+1)-dimensional QED, the massive Schwinger model. By introducing a chiral chemical potential μ5 through a quench process, we drive t...
Quantum circuit compilation with quantum computers
Davide Rattacaso, Daniel Jaschke, Marco Ballarin +2 more·Jul 31, 2024
Compilation optimizes quantum algorithms performances on real-world quantum computers. To date, it is performed via classical optimization strategies. We introduce a class of quantum algorithms to perform compilation via quantum computers, paving the...
Highly-efficient quantum Fourier transformations for certain non-Abelian groups
E. M. Murairi, M. Alam, Henry Lamm +2 more·Jul 31, 2024
Quantum Fourier transformations are an essential component of many quantum algorithms, from prime factoring to quantum simulation. While the standard abelian QFT is well-studied, important variants corresponding to \emph{nonabelian} groups of interes...
Capacities of quantum Markovian noise for large times
Omar Fawzi, Mizanur Rahaman, Mostafa Taheri·Jul 31, 2024
Given a quantum Markovian noise model, we study the maximum dimension of a classical or quantum system that can be stored for arbitrarily large time. We show that, unlike the fixed time setting, in the limit of infinite time, the classical and quantu...
Coupling a high-Q resonator to a spin qubit with all-electrical control
R. S. Eggli, T. Patlatiuk, E. G. Kelly +5 more·Jul 31, 2024
Building a practical quantum processor involves integrating millions of physical qubits along with the necessary components for individual qubit manipulation and readout. Arrays of gated silicon spins offer a promising route toward achieving this goa...
An open-source framework for quantum hardware control
Edoardo Pedicillo, Alessandro Candido, Stavros Efthymiou +7 more·Jul 31, 2024
The development of quantum computers needs reliable quantum hardware and tailored software for controlling electronics specific to various quantum platforms. Middleware is a type of computer software program that aims to provide standardized software...
Pulse family optimization for parametrized quantum gates using spectral clustering
Robert de Keijzer, J. Snijders, A. Carvalho +1 more·Jul 31, 2024
Parametrized gate circuits are used in plentiful applications in the current NISQ era of quantum computing. These parametrized gates are chiefly implemented using analytically found pulse protocols, often yielding suboptimal gate times, and consequen...
On-chip direct-current source for scalable superconducting quantum computing
Lei Jiang, Yu Xu, Shaowei Li +31 more·Jul 31, 2024
Frequency tunable qubit plays a significant role for scalable superconducting quantum processors. The state-of-the-art room-temperature electronics for tuning qubit frequency suffers from unscalable limit, such as heating problem, linear growth of co...
Post-Quantum Cryptography (PQC) Network Instrument: Measuring PQC Adoption Rates and Identifying Migration Pathways
Jakub Sowa, B. Hoang, Advaith Yeluru +4 more·Jul 31, 2024
The problem of adopting quantum-resistant crypto-graphic network protocols or post-quantum cryptography (PQC) is critically important to democratizing quantum computing. The problem is urgent because practical quantum computers will break classical e...
Enhancing the Harrow-Hassidim-Lloyd (HHL) algorithm in systems with large condition numbers
Peniel Bertrand Tsemo, Akshaya Jayashankar, K. Sugisaki +3 more·Jul 31, 2024
Although the Harrow-Hassidim-Lloyd (HHL) algorithm offers an exponential speedup in system size for treating linear equations of the form $A\vec{x}=\vec{b}$ on quantum computers when compared to their traditional counterparts, it faces a challenge re...
Shadow hamiltonian simulation
R. Somma, R. King, Robin Kothari +2 more·Jul 31, 2024
Simulating quantum dynamics is one of the most important applications of quantum computers. Traditional approaches for quantum simulation involve preparing the full evolved state of the system and then measuring some physical quantity. Here, we prese...
Nonequilibrium Dynamics of Charged Dual-Unitary Circuits
Alessandro Foligno, Pasquale Calabrese, B. Bertini·Jul 31, 2024
The interplay between symmetries and entanglement in out-of-equilibrium quantum systems is currently at the center of an intense multidisciplinary research effort. Here we introduce a setting where these questions can be characterized exactly by cons...
On the Use of Calibration Data in Error-Aware Compilation Techniques for NISQ Devices
Handy Kurniawan, Laura Rodríguez-Soriano, Daniele Cuomo +2 more·Jul 31, 2024
Reliably executing quantum algorithms on noisy intermediate-scale quantum (NISQ) devices is challenging, as they are severely constrained and prone to errors. Efficient quantum circuit compilation techniques are therefore crucial for overcoming their...
Fast Gates of Detuned Cat Qubit
A. Schlabes, R. Bhowmick, M. H. Ansari·Jul 30, 2024
Cat qubits have emerged as a promising candidate for quantum computation due to their higher error-correction thresholds and low resource overheads. In existing literature, the detuning of the two-photon drive is assumed to be zero for implementing s...
Scaling of contraction costs for entanglement renormalization algorithms including tensor Trotterization and variational Monte Carlo
Thomas Barthel, Q. Miao·Jul 30, 2024
The multi-scale entanglement renormalization ansatz (MERA) is a hierarchical class of tensor network states motivated by the real-space renormalization group. It is used to simulate strongly correlated quantum many-body systems. For prominent MERA st...
Quantum simulation via stochastic combination of unitaries
Joseph Peetz, Scott E. Smart, P. Narang·Jul 30, 2024
Quantum simulation algorithms often require numerous ancilla qubits and deep circuits, prohibitive for near-term hardware. We introduce a framework for simulating quantum channels using ensembles of low-depth circuits in place of many-qubit dilatio...
Auxiliary-Free Replica Shadows: Efficient Estimation of Multiple Nonlinear Quantum Properties
Qing Liu, Zihao Li, Xiao Yuan +2 more·Jul 30, 2024
Efficient estimation of nonlinear properties is a significant yet challenging task from quantum information processing to many-body physics. Current methodologies often suffer from an exponential sampling cost or require auxiliary qubits and deep qua...