Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Squeezing as a catalyst for non-Gaussian advantage in characterization of nonlinear media
Manju, Samaneh Hesabi, Siting Tang +2 more·Jun 28, 2026
We address the precise characterization of coupling strength of nonlinear media in continuous-variable (CV) quantum systems using coherent and squeezed vacuum states as Gaussian probes, together with their photon-added and photon-subtracted counterpa...
Bright-mode parity synthesis for bosonic state transfer through a single ancilla
Pradip Laha, Peter van Loock·Jun 28, 2026
Bosonic modes provide hardware-efficient quantum memories and logical registers, including highly non-Gaussian encoded states, but transferring finite-dimensional bosonic states through a restricted ancilla interface requires identifying which collec...
Dynamics of quantum entanglement in two time-dependent coupled harmonic oscillators
Ayoub Ghaba, Radouan Hab-arrih, Elhoussine Atmani +1 more·Jun 28, 2026
We investigate the quantum entanglement dynamics of two coupled harmonic oscillators with a time-dependent interaction. Using the Lewis-Riesenfeld invariant method, we derive the exact analytical wave functions without any perturbative or adiabatic a...
Gaussian Quantum Metrology with Realistic Linear Sensors
Jacques Ding, James W. Gardner, Tuvia Gefen +1 more·Jun 28, 2026
Quantum sensing promises enhanced precision, but the usual quantum Cramer Rao bound can be too optimistic for realistic linear sensors, where squeezing, filtering, and loss reshape quantum noise. We derive the tight Holevo Cramer Rao bound and show t...
Physics-Informed Neural Quantum Control for Rovibrational Photoassociation in a Morse Molecular System
Murilo D. Forlevesi, Emanuel Fernandes de Lima, Edson Denis Leonel·Jun 28, 2026
We present a Physics-Informed Neural Quantum Control (PINQC) framework for rovibrational photoassociation in a Morse molecular system. The proposed method combines neural-network-based laser-field generation with differentiable quantum propagation, a...
STEMGym: Benchmarking Sequential Decision-Making under Dose Budgets in Autonomous Electron Microscopy
Can Polat, Erchin Serpedin, Mustafa Kurban +1 more·Jun 28, 2026
A central premise of autonomous scientific imaging is that smarter navigation, whether Bayesian, RL-based, or otherwise adaptive, is the principal lever for sample-efficient acquisition. We present evidence to the contrary in scanning transmission el...
The QAOA on the ring of disagrees
Kunal Marwaha·Jun 28, 2026
We study the performance of symmetric local algorithms finding large cuts on the cycle graph. Such algorithms that cannot see the whole graph at depth p cut at most a (2p+1)/(2p+2) fraction of edges in expectation. We prove that the QAOA achieves thi...
Nanometric voids as optical antennas for rewritable momentum-engineered photonics in silicon
Aleksei I. Noskov, Evan P. Garcia, Haiping Sun +2 more·Jun 28, 2026
Optical antennas are widely used to localize electromagnetic fields far below the diffraction limit, enabling enhanced light-matter interactions across nanophotonics. Yet the regime in which optical confinement approaches the electronic de Broglie wa...
Quantum simulation of molecular excited-state manifolds and energies using the TEPID-ADAPT-VQE algorithm
Jason Saroni, Bharath Sambasivam, Ayush Asthana +1 more·Jun 28, 2026
The simulation of molecular excited states is a key challenge in quantum chemistry and a promising application for quantum computing. In this work, we investigate the efficacy of the truncated eigenvalue parametrized initial density adaptive variatio...
Concentration of Measure Phenomena for Quantum States on a Higher Dimensional Equator
Kabgyun Jeong·Jun 28, 2026
We revisit Lévy's lemma, a widely used analytical tool in quantum information theory. Concentration inequalities quantify the phenomenon in which Lipschitz observables concentrate around a median or mean, and serve as fundamental analytical tools acr...
A superconducting qutrit link beyond the qubit limit
Xiang Li, Zheng-Yang Mei, Yang He +7 more·Jun 28, 2026
Superconducting microwave links have enabled deterministic state transfer and remote entanglement between qubits, but deterministic links have so far operated with an effectively two-dimensional transmitted Hilbert space. Here we demonstrate a superc...
Stabilizer entropy is trustworthy for mixed states
Gianluca Esposito, Michele Viscardi, Alioscia Hamma·Jun 28, 2026
Quantifying non-stabilizerness in mixed states is provably intractable, as any strict monotone requires superexponential time. We propose a linear Stabilizer Entropy that acts as a proper non-stabilizerness monotone with overwhelming probability when...
Closing the Activation-Cone Blind Spot: Response-Time Probing and Unified Defense
Subhadip Mitra·Jun 28, 2026
Inference-time safety methods for large language models have proliferated, yet no systematic comparison exists. We evaluate five defense paradigms (no defense, static steering, CAST, AlphaSteer, probe-gated) across seven instruction-tuned models (7-3...
Steady-state Bell nonlocality in an autonomous quantum thermal machine
Bradley Longstaff·Jun 28, 2026
A quantum thermal machine is presented that is able to autonomously generate steady-state Bell nonlocality. A Lindblad equation is derived for two qubits that are incoherently coupled to a pair of thermal baths and the resulting Liouvillian is found ...
Squeezing-enhanced Pairwise Fusion of Photonic Qudits
Pradip Laha, Peter van Loock·Jun 28, 2026
Pairwise fusion gates are linear-optical measurements that herald Bell projections onto two-rail subspaces of two \(d\)-rail single-photon qudits. Without ancillary input photons, these passive measurements succeed with probability \(1-d^{-1}\), with...
First-in-human quantum entanglement imaging
Pawel Moskal, Deepak Kumar, Sushil Sharma +37 more·Jun 28, 2026
Annihilation photons are quantum-entangled in polarization, a phenomenon that has not been exploited in medical diagnostics so far. We present the first in vivo imaging of the degree of quantum entanglement of photons originating from positron-electr...
Bit-ViP: Leveraging Bit-planes to Preserve Visual Privacy in Images through Obfuscation
Vishesh Kumar Tanwar, Ashish Gupta, Sanjay Madria +1 more·Jun 28, 2026
The unprecedented growth of computer vision applications, such as surveillance systems and social media, raises security and visual privacy concerns, especially when data is stored on cloud servers. Image obfuscation offers a way to preserve visual p...
Breathing mode of quantum droplets in dipolar quantum gases: A sum-rule analysis
Xinran Zhang, Junli Liu, Huiyun Xiao +2 more·Jun 28, 2026
We theoretically investigate the ground-state properties and breathing-mode collective excitations of three-dimensional dipolar Bose gases in anisotropic harmonic traps incorporating quantum fluctuations. Combining a Gaussian variational ansatz with ...
Generic Number-of-Copies Amplification for Pseudorandom States
Zvika Brakerski, Miri Zenilman·Jun 28, 2026
We show that any quantum pseudorandom state that is secure against single-copy distinguishers, i.e. a $1$-PRS, can be amplified to $t$-copy security, i.e. to a $t$-PRS, without additional assumptions, for any polynomial $t$ in the security parameter....
Geometric Approach to Zero-Memory Quantum Dot Reservoir Computing
Bongsu Kim, Oscar Lee, Sangjun Jeon +1 more·Jun 28, 2026
Physical reservoir computing offers an energy-efficient alternative to conventional neural networks, where the intrinsic memory capacity in the physical system plays a central role. We demonstrate that memory capacity can be engineered extrinsically ...