Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Data Encoding for VQC in Qiskit, A Comparison With Novel Hybrid Encoding
Hillol Biswas·Mar 18, 2025
If quantum machine learning emulates the ways of classical machine learning, data encoding in a quantum neural network is imperative for many reasons. One of the key ones is the complexity attributed to the data size depending upon the features and t...
Scalable and fault-tolerant preparation of encoded k -uniform states
Shayan Majidy, Dominik Hangleiter, M. Gullans·Mar 18, 2025
$k$-uniform states are valuable resources in quantum information, enabling tasks such as teleportation, error correction, and accelerated quantum simulations. The practical realization of $k$-uniform states, at scale, faces major obstacles: verifying...
Error correction of a logical qubit encoded in a single atomic ion
Kyle DeBry, Nadine Meister, A. Martinez +6 more·Mar 18, 2025
Quantum error correction (QEC) is essential for quantum computers to perform useful algorithms, but large-scale fault-tolerant computation remains out of reach due to demanding requirements on operation fidelity and the number of controllable quantum...
Toward Large-Scale Distributed Quantum Long Short-Term Memory with Modular Quantum Computers
Kuan-Cheng Chen, Samuel Yen-Chi Chen, Chen-Yu Liu +1 more·Mar 18, 2025
In this work, we introduce a Distributed Quantum Long Short-Term Memory (QLSTM) framework that leverages modular quantum computing to address scalability challenges on Noisy Intermediate-Scale Quantum (NISQ) devices. By embedding variational quantum ...
Scalable low loss cryogenic packaging of quantum memories in CMOS-foundry processed photonic chips
Robert Bernson, Alex Witte, G. Clark +10 more·Mar 18, 2025
Optically linked solid-state quantum memories such as color centers in diamond are a promising platform for distributed quantum information processing and networking. Photonic integrated circuits (PICs) have emerged as a crucial enabling technology f...
Superdiffusion resilience in Heisenberg Chains with 2D interactions on a quantum processor
Keerthi Kumaran, M. Sajjan, Bibek Pokharel +7 more·Mar 18, 2025
Observing superdiffusive scaling in the spin transport of the integrable 1D Heisenberg model is one of the key discoveries in non-equilibrium quantum many-body physics. Despite this remarkable theoretical development and the subsequent experimental o...
Scalability challenges in variational quantum optimization under stochastic noise
Adelina Bärligea, Benedikt Poggel, Jeanette Miriam Lorenz·Mar 18, 2025
With rapid advances in quantum hardware, a central question is whether quantum devices with or without full error correction can outperform classical computers on practically relevant problems. Variational quantum algorithms (VQAs) have gained signif...
Demonstration of high-fidelity entangled logical qubits using transmons.
A. Vezvaee, Vinay Tripathi, Mario Morford-Oberst +3 more·Mar 18, 2025
Quantum error correction (QEC) codes are necessary to fault-tolerantly operate quantum computers. However, every such code is inherently limited by its inability to detect logical errors. Here, we propose and implement a method that leverages dynamic...
Refined Criteria for QRAM Error Suppression via Efficient Large-Scale QRAM Simulator
Yun-Jie Wang, Tai-Ping Sun, Xi-Ning Zhuang +6 more·Mar 18, 2025
Quantum random access memory (QRAM) is a critical primitive for quantum algorithms that require data lookup in superposition, but its lack of fault tolerance poses a major obstacle to practical deployment. Error filtration (EF) has been proposed as a...
QuGStep: Refining step size selection in gradient estimation for variational quantum algorithms
Senwei Liang, Linghua Zhu, Xiaosong Li +1 more·Mar 18, 2025
Variational quantum algorithms (VQAs) offer a promising approach to solving computationally demanding problems by combining parameterized quantum circuits with classical optimization. Estimating probabilistic outcomes on quantum hardware requires rep...
Quantum Dynamics Simulation of the Advection-Diffusion Equation
Hirad Alipanah, Feng Zhang, Yongxin Yao +6 more·Mar 17, 2025
The advection-diffusion equation is simulated on a superconducting quantum computer via several quantum algorithms. Three formulations are considered: (1) Trotterization, (2) variational quantum time evolution (VarQTE), and (3) adaptive variational q...
Dynamics of defects and interfaces for interacting quantum hard disks
Fabian Ballar Trigueros, Vighnesh Dattatraya Naik, Markus Heyl·Mar 17, 2025
Defects and interfaces are essential to understand the properties of matter. However, studying their dynamics in the quantum regime remains a challenge in particular concerning the regime of two spatial dimensions. Recently, it has been shown that a ...
Reshaping the Quantum Arrow of Time
Luis Pedro García-Pintos, Yi-Kai Liu, Alexey V. Gorshkov·Mar 17, 2025
While the microscopic laws of physics are often symmetric under time reversal, most natural processes that we observe are not. The emergent asymmetry between typical and time-reversed processes is referred to as the arrow of time. In quantum physics,...
Stabilizer Rényi Entropy and Conformal Field Theory
Masahiro Hoshino, Masaki Oshikawa, Yuto Ashida·Mar 17, 2025
Understanding universal aspects of many-body systems is one of the central themes in modern physics. Recently, the stabilizer Rényi entropy (SRE) has emerged as a computationally tractable measure of nonstabilizerness, a crucial resource for fault-to...
A mathematical model for a universal digital quantum computer with an application to the Grover-Rudolph algorithm
Antonio Falcó, Daniela Falcó--Pomares, Hermann G. Matthies·Mar 17, 2025
In this work, we develop a novel mathematical framework for universal digital quantum computation using algebraic probability theory. We rigorously define quantum circuits as finite sequences of elementary quantum gates and establish their role in im...
Error bounds for composite quantum hypothesis testing and a new characterization of the weighted Kubo-Ando geometric means
Péter E. Frenkel, Milán Mosonyi, Péter Vrana +1 more·Mar 17, 2025
The optimal error exponents of binary composite i.i.d. state discrimination are trivially bounded by the worst-case pairwise exponents of discriminating individual elements of the sets representing the two hypotheses, and in the finite-dimensional cl...
Low-loss Nb on Si superconducting resonators from a dual-use spintronics deposition chamber and with acid-free post-processing
Maciej W. Olszewski, Jadrien T. Paustian, Tathagata Banerjee +13 more·Mar 17, 2025
Magnetic impurities are known to degrade superconductivity. For this reason, physical vapor deposition chambers that have previously been used for magnetic materials have generally been avoided for making high-quality superconducting resonator device...
Decoherence from quantum spacetime noise: An open-systems framework with application to neutrino oscillations
Partha Nandi, Tiasha Bhattacharyya, A. S. Majumdar +2 more·Mar 17, 2025
We present a general open-quantum-systems framework to model decoherence induced by stochastic Planck-scale fluctuations of spacetime, focusing on the kappa-Minkowski noncommutative geometry as a representative quantum-gravity scenario. Treating the ...
Quantum Port: Gamification of quantum teleportation for public engagement
Pak Shen Choong, Aqilah Rasat, Afiqa Nik Aimi +1 more·Mar 17, 2025
Concepts on quantum physics are generally difficult for the general public to understand and grasp due to its counter-intuitive nature and requirement for higher level of mathematical literacy. With categorical quantum mechanics (CQM), quantum theory...
Frustration-free free fermions and beyond
Rintaro Masaoka, Seishiro Ono, Hoi Chun Po +1 more·Mar 17, 2025
Frustration-free Hamiltonians provide pivotal models for understanding quantum many-body systems. In this paper, we establish a general framework for frustration-free fermionic systems. First, we derive a necessary and sufficient condition for a free...