Papers
Live trends in quantum computing research, updated daily from arXiv.
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Steady-state spectral kissing and dissipative phase transitions
Devesh Karthik, Jorge Chávez-Carlos, Edson M. Signor +3 more·Jun 16, 2026
Spectral kissing, recently realized in a Kerr parametric oscillator (KPO), refers to the merging of pairs of energy levels and arises as a manifestation of an excited-state quantum phase transition (ESQPT). Here, we show that this phenomenon has a di...
Chaos from quantum bath fluctuations
Ilan Baud, Tamoghna Ray, Mahaveer Prasad +2 more·Jun 16, 2026
The effect of a large environment on a finite-size quantum mechanical system is two-fold: It brings dissipation, but also fluctuations of thermal and quantum origin. While dissipation tends to stabilize the dynamics, we question if and how environmen...
Ground state preparation of random all-to-all Hamiltonians using ADAPT-VQE
Sabhyata Gupta, Bharath Sambasivam, Sophia E. Economou +3 more·Jun 16, 2026
The ground state of random Hamiltonians with all-to-all interactions such as the quantum Sherrington-Kirkpatrick (SK) model and the Sachdev-Ye-Kitaev (SYK) model follow volume-law entanglement and are expected to be hard to model using tensor network...
Impulse Decoding of Quantum LDPC Codes: Equivalence of Degeneracy and Code-Shortening
Shobhit Bhatnagar, Michele Pacenti, Nithin Raveendran +2 more·Jun 16, 2026
Quantum error correction is essential for building scalable quantum computers. Within the stabilizer formalism, the Calderbank-Shor-Steane framework constructs quantum codes from pairs of classical linear codes. A distinctive feature in this setting ...
Einstein-Podolsky-Rosen correlations between mechanical oscillators revealed through SU(1,1) interferometry
Max-Emanuel Kern, Stefano Marti, Raquel Garcia-Belles +5 more·Jun 16, 2026
Quantum correlations are essential for achieving quantum advantage in computing, communication and sensing. Moreover, their observation challenges and constrains our fundamental understanding of nature. Mechanical oscillators in the quantum regime pr...
Learning Arbitrary Lindbladians with Quantum Error Correction
Nikita Romanov, Petr Ivashkov, Weiyuan Gong +4 more·Jun 16, 2026
We study ansatz-free Lindbladian learning, the problem of reconstructing the generator of an open quantum system without prior knowledge of its Hamiltonian or dissipator structures. This problem exhibits two distinct information-theoretic precision l...
Optimal Probe State for Phase Estimation Under Covariant Measurement
Qipeng Qian, Christos N. Gagatsos·Jun 16, 2026
We study the optimization of input states for phase estimation under covariant measurements. Building on Holevo's framework, which provides the optimal covariant measurement for a fixed input state, we further optimize over the input state itself. Fo...
Optimal Calibration of Quantum Network Links
Vinay Kumar, Claudio Cicconetti, Marco Conti +1 more·Jun 16, 2026
The reliable distribution of entanglement is essential for the effective operation of quantum networks. Due to fundamental differences between quantum and classical communication systems, it is necessary to develop specialised algorithms and protocol...
Closest Accessible Symmetry reduction: a tool for Hamiltonian interpolation analysis
Ana Palacios, Artur Garcia-Saez, Arnau Riera +1 more·Jun 16, 2026
We introduce a framework for analysing the spectrum of Hamiltonian interpolations without heavily relying on discretising the interpolation parameter. The method is based on the concept of accessible symmetries: a problem-class-dependent family of ce...
A polynomial-time approximation scheme for minimum-weight decoding of topological codes
Shouzhen Gu, Lily Wang, Aleksander Kubica·Jun 16, 2026
Two-dimensional topological translationally invariant (2D TTI) stabilizer codes lie at the heart of fault-tolerant quantum computation, but using them requires solving the decoding problem. Minimum-weight decoding of these codes was recently shown to...
Singular Vector Finite Element Basis Functions for Tetrahedra in Complex Electromagnetic Geometries
Samuel T. Elkin, Ghazi Khan, Ebrahim Forati +4 more·Jun 16, 2026
Electromagnetic finite element method (FEM) implementations using traditional basis functions struggle to accurately represent field behavior near singular features such as conducting wedges. To combat this, specialized singular basis functions have ...
Stochastic signal sensing with finite energy and dead time at the fundamental quantum limit
James W. Gardner, Tuvia Gefen, Matteo Fadel·Jun 16, 2026
State preparation, measurement, and reset operations take finite time and use finite energy in realistic experiments, yet the impact of this on optimal quantum metrological protocols is not properly understood. We study the effect on sensing a stocha...
Quantum statistical enhancement of collective behaviour in a bosonic active Ising model
Kian L. Assent, Emil Strauch, Sabine H. L. Klapp +2 more·Jun 16, 2026
Collective behaviour such as flocking (the collective motion of a spontaneously formed group along a common direction) or aster formation (the binding of opposing flocks, inhibiting each others motion) are intriguing emergent phenomena in active syst...
Cavity-enhanced superconducting response in an underdoped cuprate
Angela Montanaro, Vadim Plastovets, Nitesh Khatiwada +15 more·Jun 16, 2026
Superconductors carry electrical current without resistance when paired electrons condense into a coherent macroscopic quantum state. In underdoped cuprates, evidence suggests that pairing-related correlations and superconducting fluctuations can sur...
Full-state information-disturbance tradeoff for direction estimation with antiparallel spin-coherent pairs
Massimiliano F. Sacchi·Jun 16, 2026
We determine the optimal information--disturbance tradeoff for estimating an unknown spatial direction encoded in two antiparallel spins. Rotational covariance reduces the optimization over all instruments to a finite-dimensional Choi problem: a posi...
Low-Cost Home Automation System for Municipal Swimming Pool: Arduino-Based Implementation and Data Analysis
Júlio Rocha, Salviano Soares, Carlos Quental·Jun 16, 2026
This paper presents a low-cost home automation system implemented in a municipal swimming pool to address various challenges, including security concerns, air quality control, gas leakage detection, energy consumption reduction, and temperature and h...
Approximately Decoding the Colour Code
Mark Walters·Jun 16, 2026
Recently we showed that minimum weight decoding in the (6.6.6 planar) colour code is NP-hard. However, it remained an open question as to whether it was possible to approximate the minimum weight decoding arbitrarily closely in polynomial time. In th...
Emergent de Sitter Space and Non-Unitary Tensor Networks from Non-Hermitian Quantum Criticality
Kuang-Hung Chou, Po-Yao Chang·Jun 16, 2026
Extending the holographic principle to de Sitter (dS) spacetimes remains one of the most vital open frontiers in quantum gravity, where a microscopic, bottom-up tensor-network framework that relates boundary quantum data to emergent de Sitter spaceti...
Manipulation of Topological Corner States via Subchiral Symmetry
Hai-Tao Ding, Tianqi Chen, Leong-Chuan Kwek +1 more·Jun 16, 2026
Higher-order topological phases provide robust corner modes, but their use requires controllable creation, isolation, and transfer of individual modes and their superpositions. Here we demonstrate, using the two-dimensional Benalcazar-Bernevig-Hughes...
Average entropy of Bogoliubov-Kubo-Mori random state ensemble
Sohail, Lu Wei·Jun 16, 2026
Random states play a foundational role in different branches of modern quantum science. In this work, we study a recently proposed random state ensemble induced from von Neumann entropy through the Bogoliubov-Kubo-Mori (BKM) metric. In particular, we...