Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Composite nonadiabatic geometric quantum gates with optimization on superconducting circuits
Cheng-Yun Ding, Wan-Fang Liu, Li-Hua Zhang +2 more·Sep 29, 2025
Due to its fast and robust characteristics, nonadiabatic geometric quantum computation with various optimized techniques has received much attention. However, these strategies either require precise pulse control or can only mitigate partial systemat...
Automated Discovery of Gadgets in Quantum Circuits for Efficient Reinforcement Learning
Oleg M. Yevtushenko, Florian Marquardt·Sep 29, 2025
Reinforcement learning (RL) has proven itself as a powerful tool for the discovery of quantum circuits and quantum protocols. We have recently shown that including composite quantum gates -- referred to as ``gadgets'' -- in the action space of RL age...
Two bases suffice for QMA1-completeness
Henry Ma, Anand Natarajan·Sep 29, 2025
We introduce a basis-restricted variant of the Quantum-k-SAT problem, in which each term in the input Hamiltonian is required to be diagonal in either the standard or Hadamard basis. Our main result is that the Quantum-6-SAT problem with this basis r...
Fractional Control Gate Protocols For Quantum Engines
Elliot John Fox, Taysa Mendes de Mendonça, Ferdinand Schmidt-Kaler +1 more·Sep 28, 2025
Nth-root gates allow for a paced application of two-qubit operations. We apply them in quantum thermodynamic protocols for operating a quantum heat engine. A set of circuits for two and three qubits are compared by considering maximum work production...
Low-Overhead and High-Fidelity Preparation of Logical Non-Clifford States with Multi-Level Transversal Injection
Jiaxuan Zhang, Tian-Hao Wei, Xi-Ning Zhuang +4 more·Sep 28, 2025
Rotation gates are widely used in various quantum algorithms. To implement fault-tolerant rotation gates, state distillation or gate synthesis is typically employed. However, the overhead of these schemes scales rapidly with increasing Clifford hiera...
Ultrafast Single-Qubit Gates in the Diabatic Regime
Deniz Türkpençe, Selçuk Çakmak·Sep 27, 2025
Logic gates in superconducting quantum processors are implemented through precise quantum control techniques in the microwave regime. The choice of drive frequency and other control parameters directly determines the duration of quantum gate operatio...
Anticoherent $k$-planes and coding techniques for a 3-qubit scheme of universal quantum computing
L. Aragón-Muñoz, C. Chryssomalakos, A. G. Flores-Delgado +2 more·Sep 27, 2025
Toponomic quantum computing (TQC) employs rotation sequences of anticoherent $k$-planes to construct noise-tolerant quantum gates. In this work, we demonstrate the implementation of generalized Toffoli gates, using $k$-planes of spin systems with $s ...
Cost-aware Photonic Graph State Generation: A Graphical Framework
Sobhan Ghanbari, Hoi-Kwong Lo·Sep 26, 2025
Photonic graph states are essential resources for quantum computation and communication. Deterministic emitter-based generation of graph states overcomes the scalability issues of probabilistic approaches; nonetheless, their experimental realization ...
Probing high-frequency gravitational waves with entangled vibrational qubits in linear Paul traps
Ryoto Takai·Sep 26, 2025
This work investigates the use of linear Paul traps as quantum sensors for detecting megahertz gravitational waves. Single-ion configurations exploit graviton-photon conversion in the presence of external magnetic fields, while two-ion systems use re...
Quantum Gates via Dynamical Decoupling of Central Qubit on IBMQ and 15NV Center in Diamond
Lucas Tsunaki, Michael Dotan, Kseniia Volkova +1 more·Sep 26, 2025
We demonstrate a hardware-agnostic protocol for realizing fast, high-fidelity gates through dynamical decoupling (DD) pulse sequences applied to a central qubit coupled to target qubits. The target qubits are controlled by leveraging their intrinsic ...
The 2T-quoctit: a two-mode bosonic qudit for high energy physics
Doga Murat Kürkçüoglu, Henry Lamm, Oluwadara Ogunkoya +1 more·Sep 26, 2025
In this work, we study a two-mode bosonic encoding of a quoctit inside a non-Abelian group-structured constellation of coherent states. This work is motivated by the importance of nonabelian symmetry in particle physics and the desire to have transve...
Optimizing the non-Clifford-count in unitary synthesis using Reinforcement Learning
David Kremer, Ali Javadi-Abhari, Priyanka Mukhopadhyay·Sep 26, 2025
In this paper we study the potential of using reinforcement learning (RL) in order to synthesize quantum circuits, while optimizing the T-count and CS-count, of unitaries that are exactly implementable by the Clifford+T and Clifford+CS gate sets, res...
From VQE To SQD: Modern Quantum Algorithms For The Electronic Structure Problem
Abdelmouheymen Rabah Khamadja, Mohamed Taha Rouabah·Sep 25, 2025
This thesis investigates sampling-based quantum algorithms for electronic ground state energy estimation, focusing on Quantum-Selected Configuration Interaction (QSCI) and Sample-Based Quantum Diagonalization (SQD) as near-term alternatives to the Va...
Harnessing optical disorder for Bell inequalities violation
Baptiste Courme, Malo Joly, Adrian Makowski +2 more·Sep 25, 2025
Bell inequalities are a cornerstone of quantum physics. By carefully selecting measurement bases (typically polarization), their violation certifies quantum entanglement. Such measurements are disrupted by the presence of optical disorder in propagat...
Quantum Simulation and Energy Estimation for Discretized Anharmonic oscillator
Saurav Suman, Bikash K. Behera, Vivek Vyas +1 more·Sep 25, 2025
Anharmonic potential quantum system play crucial role in physics as they provide a more realistic description of oscillatory phenomena, which often deviate from the idealized harmonic model. However, simulating such system on classical computers is h...
A Review on Quantum Circuit Optimization using ZX-Calculus
Tobias Fischbach, Pierre Talbot, Pascal Bouvry·Sep 25, 2025
Quantum computing promises significant speed-ups for certain algorithms but the practical use of current noisy intermediate-scale quantum (NISQ) era computers remains limited by resources constraints (e.g., noise, qubits, gates, and circuit depth). Q...
Realization of Graphene Quantum Dots for Innovative Biosensor Development and Diverse Applications
Kumar Gautam, Kumar Shubham, Hitesh Sharma +5 more·Sep 24, 2025
This paper investigates quantum dots (QDs), which are miniature semiconductor structures with remarkable optical and electrical properties due to quantum confinement processes. Traditional QDs, such as CdTe, have been extensively investigated; howeve...
Quantum error correction beyond $SU(2)$: spin, bosonic, and permutation-invariant codes from convex geometry
Arda Aydin, Victor V. Albert, Alexander Barg·Sep 24, 2025
We develop a framework for constructing quantum error-correcting codes and logical gates for three types of spaces -- composite permutation-invariant spaces of many qubits or qudits, composite constant-excitation Fock-state spaces of many bosonic mod...
Computational relative entropy
Johannes Jakob Meyer, Asad Raza, Jacopo Rizzo +3 more·Sep 24, 2025
Our capacity to process information depends on the computational power at our disposal. Information theory captures our ability to distinguish states or communicate messages when it is unconstrained with unrivaled beauty and elegance. For computation...
Digital Signal Processing from Classical Coherent Systems to Continuous-Variable QKD: A Review of Cross-Domain Techniques, Applications, and Challenges
Davi Juvêncio Gomes de Sousa, Caroline da Silva Morais Alves, Valéria Loureiro da Silva +1 more·Sep 24, 2025
This systematic review investigates the application of digital signal processing (DSP) techniques -- originally developed for coherent optical communication systems to continuous-variable quantum key distribution (CV-QKD). The convergence of these do...