Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum-Enhanced Secure Approval Voting Protocol
Saiyam Sakhuja, S. Balakrishnan·Jun 28, 2024
In a world where elections touch every aspect of society, the need for secure voting is paramount. Traditional safeguards, based on classical cryptography, rely on complex math problems like factoring large numbers. However, quantum computing is chan...
Integrating quantum algorithms into classical frameworks: a predictor–corrector approach using HHL
Omer Rathore, Alastair Basden, Nicholas Chancellor +1 more·Jun 28, 2024
The application of quantum algorithms to classical problems is generally accompanied by significant bottlenecks when transferring data between quantum and classical states, often negating any intrinsic quantum advantage. Here we address this challeng...
Quantum key distribution rates from non-symmetric conic optimization
Andrés González Lorente, Pablo V. Parellada, Miguel Castillo-Celeita +1 more·Jun 28, 2024
Computing key rates in quantum key distribution (QKD) numerically is essential to unlock more powerful protocols, that use more sophisticated measurement bases or quantum systems of higher dimension. It is a difficult optimization problem, that depen...
Dataflow-Based Optimization for Quantum Intermediate Representation Programs
Junjie Luo, Haoyu Zhang, Jianjun Zhao·Jun 28, 2024
This paper proposes QDFO, a dataflow-based optimization approach to Microsoft QIR. QDFO consists of two main functions: one is to preprocess the QIR code so that the LLVM optimizer can capture more optimization opportunities, and the other is to opti...
From Problem to Solution: A General Pipeline to Solve Optimisation Problems on Quantum Hardware
Tobias Rohe, Simon Gratz, Michael Kolle +3 more·Jun 28, 2024
With constant improvements of quantum hardware and quantum algorithms, quantum advantage comes within reach. Parallel to the development of the computer at the end of the twentieth century, quantum software development will now also rapidly gain in i...
A Traveling-Wave Parametric Amplifier and Converter
M. Malnou, B. T. Miller, J. A. Estrada +5 more·Jun 27, 2024
High-fidelity qubit measurement is a critical element of all quantum computing architectures. In superconducting systems, qubits are typically measured by probing a readout resonator with a weak microwave tone that must be amplified before reaching t...
Contextuality of all optimal quantum cloning
Mina Doosti, Theodoros Yianni, Farid Shahandeh·Jun 27, 2024
Quantum contextuality is a key nonclassical feature underlying advantages in quantum computation and communication. We introduce a new method to study contextuality in quantum information-processing tasks and protocols, relying solely on observed inf...
Spontaneous symmetry breaking in open quantum systems: strong, weak, and strong-to-weak
Ding Gu, Zijian Wang, Zhong Wang·Jun 27, 2024
Depending on the coupling to the environment, symmetries of open quantum systems manifest in two distinct forms, the strong and the weak. We study the spontaneous symmetry breaking among phases with strong symmetry, weak symmetry, and no symmetry. Co...
Quantum Thermodynamics
Patrick P. Potts·Jun 27, 2024
The theory of quantum thermodynamics investigates how the concepts of heat, work, and temperature can be carried over to the quantum realm, where fluctuations and randomness are fundamentally unavoidable. These lecture notes provide an introduction t...
Resilience of the surface code to error bursts
Shi Jie Samuel Tan, Christopher A. Pattison, M. McEwen +1 more·Jun 27, 2024
Quantum error correction works effectively only if the error rate of gate operations is sufficiently low. However, some rare physical mechanisms can cause a temporary increase in the error rate that affects many qubits; examples include ionizing radi...
ML-Powered FPGA-based Real-Time Quantum State Discrimination Enabling Mid-circuit Measurements
Neel R. Vora, Yilun Xu, A. Hashim +11 more·Jun 27, 2024
Similar to reading the transistor state in classical computers, identifying the quantum bit (qubit) state is a fundamental operation to translate quantum information. However, identifying quantum state has been the slowest and most susceptible to err...
A comment on comparing optimization on D-Wave and IBM quantum processors
Catherine C. McGeoch, Kevin Chern, Pau Farr'e +1 more·Jun 27, 2024
Recent work [Sachdeva et al.] presented an iterative hybrid quantum variational optimization algorithm designed by Q-CTRL and executed on IBM gate-based quantum processing units (QPUs), claiming a significant performance advantage against a D-Wave qu...
Quartic quantum speedups for planted inference
Alexander Schmidhuber, Ryan O'Donnell, Robin Kothari +1 more·Jun 27, 2024
We describe a quantum algorithm for the Planted Noisy kXOR Problem (also known as Sparse Learning Parity with Noise) that achieves a nearly (fourth-power) speedup over the best known classical algorithm while using exponentially less space. Our work ...
JuliVQC: an Efficient Variational Quantum Circuit Simulator for Near-Term Quantum Algorithms
Wei-You Liao, Xiang Wang, Xiao-Yue Xu +4 more·Jun 27, 2024
We introduce JuliVQC: a light-weight, yet extremely efficient variational quantum circuit simulator. JuliVQC is part of an effort for classical simulation of the \textit{Zuchongzhi} quantum processors, where it is extensively used to characterize the...
Stark control of plexcitonic states in incoherent quantum systems
Hira Asif, Ramazan Sahin·Jun 27, 2024
In this study, we demonstrate the coherent control of plexcitonic modes in (i) off-resonant and (ii) resonant coupled plasmon-emitter systems through the optical Stark effect (OSE). By leveraging the Stark shift in degenerate energy eigenstates of tw...
Multivariate bicycle codes
L. Voss, S. Xian, Tobias Haug +1 more·Jun 27, 2024
Quantum error correction suppresses noise in quantum systems to allow for high-precision computations. In this work, we introduce Multivariate Bicycle (MB) Quantum Low-Density Parity-Check (QLDPC) codes, via an extension of the framework developed by...
QOS: A Quantum Operating System
Emmanouil Giortamis, Francisco Romão, Nathaniel Tornow +1 more·Jun 27, 2024
Quantum computers face challenges due to hardware constraints, noise errors, and heterogeneity, and face fundamental design tradeoffs between key performance metrics such as \textit{quantum fidelity} and system utilization. This substantially complic...
Leapfrogging Sycamore: harnessing 1432 GPUs for 7× faster quantum random circuit sampling
Xianhe Zhao, Han-Sen Zhong, Feng Pan +10 more·Jun 27, 2024
ABSTRACT Random quantum circuit sampling serves as a benchmark to demonstrate quantum computational advantage. Recent progress in classical algorithms, especially those based on tensor network methods, has significantly reduced the classical simulati...
Unified Architecture for Quantum Lookup Tables
Shuchen Zhu, Aarthi Sundaram, Guang Hao Low·Jun 26, 2024
Quantum access to arbitrary classical data encoded in unitary black-box oracles underlies interesting data-intensive quantum algorithms, such as machine learning or electronic structure simulation. The feasibility of these applications depends crucia...
Managing Classical Processing Requirements for Quantum Error Correction
Satvik Maurya, Abtin Molavi, Aws Albarghouthi +1 more·Jun 26, 2024
Large-scale quantum computers promise transformative speedups, but their viability hinges on fast and reliable quantum error correction (QEC). At the center of QEC are decoders-classical algorithms running on hardware such as FPGAs, GPUs, or CPUs tha...