Papers
Live trends in quantum computing research, updated daily from arXiv.
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Quantum State Design and Emergent Confinement Mechanism in Measured Tensor Network States
Guglielmo Lami, Andrea De Luca, X. Turkeshi +1 more·Apr 23, 2025
Randomness is a fundamental aspect of quantum mechanics, arising from the measurement process that collapses superpositions into definite outcomes according to Born's rule. Generating large-scale random quantum states is crucial for quantum computing...
Braiding of Majorana zero modes in vortex cores
Maxwell Buss, Jasmin Bedow, Prashant Gupta +1 more·Apr 23, 2025
We demonstrate the successful simulation of $\sqrt{Z}$-, $\sqrt{X}$- and $X$-quantum gates using Majorana zero modes (MZMs) that emerge in magnetic vortices located in topological superconductors. We compute the transition probabilities and geometric...
Simulating Quantum Circuits with Tree Tensor Networks using Density-Matrix Renormalization Group Algorithm
Aditya Dubey, Z. Zeybek, P. Schmelcher·Apr 23, 2025
Quantum computing offers the potential for computational abilities that can go beyond classical machines. However, they are still limited by several challenges such as noise, decoherence, and gate errors. As a result, efficient classical simulation o...
Optimization Framework for Reducing Mid-circuit Measurements and Resets
Yanbin Chen, Innocenzo Fulginiti, C. Mendl·Apr 23, 2025
The paper addresses the optimization of dynamic circuits in quantum computing, with a focus on reducing the cost of mid-circuit measurements and resets. We extend the probabilistic circuit model (PCM) and implement an optimization framework that targ...
Surface-code Superconducting Quantum Processors: From Calibration To Logical Performance
Hany Ali·Apr 23, 2025
Current quantum processors are fragile, noisy and fairly limited in both quantity and quality with tens of qubits and physical error rates of around 10^-3. To realize practical quantum applications, however, error rates need to be below 10^-15 across...
Resource Reduction in Multiparty Quantum Secret Sharing of both Classical and Quantum Information under Noisy Scenario
Nirupam Basak, Goutam Paul·Apr 23, 2025
Quantum secret sharing (QSS) enables secure distribution of information among multiple parties but remains vulnerable to noise. We analyze the effects of bit-flip, phase-flip, and amplitude damping noise on the multiparty QSS for classical message (Q...
Path Matters: Industrial Data Meet Quantum Optimization
Lukas Schmidbauer, Carlos A. Riofr'io, F. Heinrich +4 more·Apr 23, 2025
Real-world optimization problems must undergo a series of transformations before becoming solvable on current quantum hardware. Even for a fixed problem, the number of possible transformation paths-from industry-relevant formulations through binary c...
Towards Quantum Universal Hypothesis Testing
Arick Grootveld, Haodong Yang, Biao Chen +2 more·Apr 22, 2025
Hoeffding's formulation and solution to the universal hypothesis testing (UHT) problem had a profound impact on many subsequent works dealing with asymmetric hypotheses. In this work, we introduce a quantum universal hypothesis testing framework that...
Projection Coefficients Estimation in Continuous-Variable Quantum Circuits
M. W. AlMasri·Apr 22, 2025
In this work, we propose a continuous-variable quantum algorithm to compute the projection coefficients of a holomorphic function in the Segal--Bargmann space by leveraging its isometric correspondence with single-mode quantum states. Using CV quantu...
Towards a Generalized Theory of Observers
Hatem Elshatlawy, Dean Rickles, Xerxes D. Arsiwalla·Apr 22, 2025
We propose a formal framework for understanding and unifying the concept of observers across physics, computer science, philosophy, and related fields. Building on cybernetic feedback models, we introduce an operational definition of minimal observer...
Topological properties of curved spacetime extended Su-Schrieffer-Heeger model
Priyanuj Rajbongshi, Ranjan Modak·Apr 22, 2025
The Su-Schrieffer-Heeger (SSH) model, a prime example of a one-dimensional topologically nontrivial insulator, has been extensively studied in flat space-time. In recent times, many studies have been conducted to understand the properties of the low-...
Quantum machine learning advantages beyond hardness of evaluation
Riccardo Molteni, Simon C. Marshall, Vedran Dunjko·Apr 22, 2025
The most general examples of quantum learning advantages involve data labeled by cryptographic or intrinsically quantum functions, where classical learners are limited by the infeasibility of evaluating the labeling functions using polynomial-sized c...
Coupled Instantons In A Four-Well Potential With Application To The Tunneling Of A Composite Particle
Pervez Hoodbhoy, M. Haashir Ismail, M. Mufassir·Apr 22, 2025
Coupled instantons are introduced by generalizing the double well potential to multiple mutually coupled wells. Physically this corresponds to the simultaneous tunneling of multiple degrees of freedom. A system with four equal minima is examined in d...
QGeo: A Python Package for Calculating Geodesic Control Functions for Quantum Computing
Sean T. Crowe, Joshua J. Leiter, John P. T. Stenger +5 more·Apr 22, 2025
We present a new Python package that uses the formalism of geometric quantum complexity to numerically compute metric-dependent geometric cost and control functions associated with preparing a given unitary transformation on a quantum computer. The n...
Nondemolition fluorescence readout and high-fidelity unconditional reset of a fluxonium qubit via dissipation engineering
S. Watanabe, Kotaro Hida, Kohei Matsuura +1 more·Apr 22, 2025
Non-demolition readout and high-fidelity unconditional reset of qubits are key requirements for practical quantum computation. For superconducting qubits, readout and reset are typically realized using resonators based on dispersive approximation. Ho...
Flexion: Adaptive In-Situ Encoding for On-Demand QEC in Ion Trap Systems
Keyi Yin, Xiang Fang, Zhuo Chen +10 more·Apr 22, 2025
Recent advances in quantum hardware and quantum error correction (QEC) have set the stage for early demonstrations of fault-tolerant quantum computing (FTQC). A key near-term goal is to build a system capable of executing millions of logical operatio...
Ge$_{1-x}$Si$_{x}$ single crystals for Ge hole spin qubit integration
Andreas Fuhrberg, P. M. During, O. Fedchenko +9 more·Apr 22, 2025
Spin qubits are fundamental building blocks of modern quantum computing devices. The path of Ge-based hole-spin qubits has several advantages over Si-based electron-spin systems, such as the absence of valley band degeneracy, the possibility of effic...
Robust mixed-state cluster states and spurious topological entanglement negativity
Seunghun Lee, Eun-Gook Moon·Apr 22, 2025
We investigate 1D and 2D cluster states under local decoherence to assess the robustness of their mixed-state subsystem symmetry-protected topological (SSPT) order. By exactly computing fidelity correlators via dimensional reduction of effective stat...
Lattice surgery-based logical state teleportation via noisy links
Áron Márton, Luis Colmenarez, Lukas Bödeker +1 more·Apr 22, 2025
For planar architectures, surface code-based quantum error correction is one of the most promising approaches to fault-tolerant quantum computation. This is partially due to the variety of fault-tolerant logical protocols that can be implemented in t...
Augmenting Simulated Noisy Quantum Data Collection by Orders of Magnitude Using Pre-Trajectory Sampling with Batched Execution
T. Patti, Thien Nguyen, J. Lietz +2 more·Apr 22, 2025
Classically simulating quantum systems is challenging, as even noiseless n-qubit quantum states scale as 2n. The complexity of noisy quantum systems is even greater, requiring 2n × 2n-dimensional density matrices. Various approximations reduce densit...