Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Differential Equation Solvers with Low State Preparation Cost: Eliminating the Time Dependence in Dissipative Equations
Gengzhi Yang, Akwum Onwunta, Dong An·Aug 21, 2025
Linear dissipative differential equation is a fundamental model for a large number of physical systems, such as quantum dynamics with non-Hermitian Hamiltonian, open quantum system dynamics, diffusion process and damped system. In this work, we propo...
Contextuality from the vacuum
Caroline Lima, María Rosa Preciado-Rivas, Sanchit Srivastava·Aug 20, 2025
Contextuality, a key resource for quantum advantage, describes systems in which the outcome of a measurement is not independent of other compatible measurements, in contrast to classical hidden-variable descriptions. We investigate the harvesting of ...
Universality in the Anticoncentration of Noisy Quantum Circuits at Finite Depths
Arman Sauliere, Guglielmo Lami, Corentin Boyer +2 more·Aug 20, 2025
We present universal properties of anticoncentration in weakly noisy quantum circuits at finite depth. We develop a generic framework for single- and multi-qubit noise channels in the weak-noise limit and introduce an effective description in terms o...
Efficient nonclassical state preparation via generalized parity measurement
Chen-yi Zhang, Jun Jing·Aug 20, 2025
Nonclassical states of bosonic modes, especially the large number states, are valuable resources for quantum information processing and quantum metrology. It is however intricate to generate a desired Fock state of bosonic systems by unitary protocol...
Analytical bounds for decoy-state quantum key distribution with discrete phase randomization
Zhaohui Liu, Ahmed Lawey, Mohsen Razavi·Aug 20, 2025
We analyze the performance of quantum key distribution (QKD) protocols that rely on discrete phase randomization (DPR). For many QKD protocols that rely on weak coherent pulses (WCPs), continuous phase randomization is assumed, which simplifies the s...
High-fidelity realisation of CNOT gate in Majorana-based optical platform
Jia-Kun Li, Kai Sun, Ze-Yan Hao +7 more·Aug 20, 2025
We present the experimental realisation of a robust CNOT quantum gate using Majorana zero modes simulated on a photonic platform. Three Kitaev chains supporting Majorana zero modes at their endpoints are used to encode two logical qubits, and both in...
Entanglement-enabled image transmission through complex media
Chloé Vernière, Raphaël Guitter, Baptiste Courme +1 more·Aug 20, 2025
Scattering in complex media scrambles light, thus obscuring images and limiting applications from astronomy to microscopy. Existing computational and wavefront-shaping methods treat scattering as a linear optical-wave inversion problem that aims to r...
Dirac, Schroedinger, and Maxwell equations in scalar and vector field quantum mechanics
Boris Chichkov·Aug 20, 2025
The quantum theory of relativistic particles, based on the first quantization technique similar to that used by Schroedinger and Dirac in formulating quantum mechanics, is reconsidered on the basis of a photon-like dispersion relation corresponding t...
From Chiral Topological Dynamics to Chiral Topological Amplification: Real vs Imaginary Parameters in a Hermitian Bosonic Chain
Kiran Babasaheb Estake, T. R. Vishnu, Dibyendu Roy·Aug 20, 2025
We propose a Hermitian quadratic bosonic model (QBH) whose dynamical matrix exhibits distinct topological and dynamical phenomena depending on whether the hopping and pairing amplitudes are real or purely imaginary. In the real-parameter regime, the ...
Breaking conservation law enables steady-state entanglement out of equilibrium
Vince Hou, Eric Kleinherbers, Shane P. Kelly +1 more·Aug 20, 2025
We show how entangled steady states can be prepared by purely dissipative dynamics in a system coupled to a thermal environment. While entanglement is hindered by thermalization when the system and environment exchange a conserved quantity, we demons...
Momentum Squeezed State Realized via Optimal Filtering in Optomechanics: Implications for Gravity-Induced Entanglement
Ryotaro Fukuzumi, Kosei Hatakeyama, Daisuke Miki +1 more·Aug 20, 2025
We analyze the conditional quantum state of a mechanical mirror in an optomechanical system subject to continuous measurement, feedback control, and quantum filtering. We identify a parameter regime in which the mirror exhibits momentum squeezing bey...
Trace-Based Reconstruction of Quantum Circuit Dataflow in Surface Codes
Theodoros Trochatos, Christopher Kang, Andrew Wang +2 more·Aug 20, 2025
Practical applications of quantum computing depend on fault-tolerant devices that employ error correction. A promising quantum error-correcting code for large-scale quantum computing is the surface code. For this code, Fault-Tolerant Quantum Computin...
Spin versus Magic: Lessons from Gluon and Graviton Scattering
John Gargalionis, Nathan Moynihan, S. Trifinopoulos +3 more·Aug 20, 2025
The quantum property of non-stabiliserness, also known as magic, plays a key role in designing quantum computing systems. How to produce, manipulate and enhance magic remains mysterious, such that concrete examples of physical systems that manifest m...
Application of resource theory based on free Clifford+kT computation to early fault-tolerant quantum computing
Yuya O. Nakagawa, Yasunori Lee·Aug 20, 2025
Recent advances in quantum hardware are bringing fault-tolerant quantum computing (FTQC) closer to reality. In the early stage of FTQC, however, the numbers of available logical qubits and high-fidelity $T$ gates remain limited, making it crucial to ...
Reinforcement learning entangling operations on spin qubits
M. Abedi, Markus Schmitt·Aug 20, 2025
High-fidelity control of one- and two-qubit gates past the error correction threshold is an essential ingredient for scalable quantum computing. We present a reinforcement learning (RL) approach to find entangling protocols for semiconductor-based si...
Single-click protocols for remote state preparation using weak coherent pulses
Janice van Dam, Emil R. Hellebek, Tzula B. Propp +3 more·Aug 20, 2025
Remote state preparation (RSP) allows one party to remotely prepare a known quantum state on another party's qubit using entanglement. This can be used in quantum networks to perform applications such as blind quantum computing or long-distance quant...
Improving VQE parameter quality on noisy quantum processors with cost-effective readout error mitigation
N. Belaloui, Abdellah Tounsi, Abdelmouheymen Rabah Khamadja +4 more·Aug 20, 2025
The inherent noise in current Noisy Intermediate-Scale Quantum (NISQ) devices presents a major obstacle to the accurate implementation of quantum algorithms such as the Variational Quantum Eigensolver (VQE) for quantum chemistry applications. This st...
Finite-Dimensional Quantum Systems under the Fourth Law of Thermodynamics
Rohit Ray·Aug 20, 2025
The Steepest Entropy Ascent (SEA) ansatz, recently recognized as the fourth law of thermodynamics, governs the irreversible evolution of a system from a non-equilibrium state toward a unique maximum-entropy equilibrium. SEA builds upon the second law...
Preparation of Hamming-Weight-Preserving Quantum States with Log-Depth Quantum Circuits
Y. Li, Guojing Tian, Xiaoyu He +1 more·Aug 20, 2025
Quantum state preparation is a critical task in quantum computing, particularly in fields such as quantum machine learning, Hamiltonian simulation, and quantum algorithm design. The depth of preparation circuit for the most general state has been opt...
Quantum reservoir computing induced by controllable damping
Emanuele Ricci, Francesco Monzani, Luca Nigro +1 more·Aug 20, 2025
Quantum reservoir computing has emerged as a promising machine learning paradigm for processing temporal data on near-term quantum devices, as it allows for exploiting the large computational capacity of the qubits without suffering from typical issu...