Papers
Unitary Encoding of Thermal States via Thermofield Dynamics on Quantum Computers
G. X. A. Petronilo, M. R. Araújo, A. B. M. Souza +1 more·Apr 1, 2026
Quantum computing has attracted the attention of the scientific community in the past few decades. However, despite some relevant advantages, near-term quantum devices remain severely limited by thermal effects, which induce decoherence and restrict ...
Learning Hidden Structures in Open Quantum Dynamics
Alexander Teretenkov, Sergey Kuznetsov, Alexander Pechen·Apr 1, 2026
We introduce a machine-learning approach for identifying hidden structural features of open quantum dynamics under restricted experimental access. Unlike most existing data-driven methods which focus on detection or prediction of dynamical behavior, ...
Quantum-Safe Code Auditing: LLM-Assisted Static Analysis and Quantum-Aware Risk Scoring for Post-Quantum Cryptography Migration
Animesh Shaw·Apr 1, 2026
The impending arrival of cryptographically relevant quantum computers (CRQCs) threatens the security foundations of modern software: Shor's algorithm breaks RSA, ECDSA, ECDH, and Diffie-Hellman, while Grover's algorithm reduces the effective security...
Structured detection microscopy
Larnii Booth, Kyle Clunies-Ross, Rumelo Amor +4 more·Apr 1, 2026
Super-resolution microscopy is crucial for imaging sub-wavelength biological structures. However, most techniques rely on nonlinear saturation or stochastic switching of emitters, limiting imaging speed and increasing phototoxicity. Here, we achieve ...
A Security-Aware Nonlinearity Study of FPGA-Based Time-to-Digital Converters for Quantum Key Distribution Systems
Kun Qin, Carsten Trinitis·Mar 31, 2026
Intrinsic nonlinearity in FPGA-based time-to-digital converters (TDCs) is often treated as a calibration issue and evaluated mainly through post-correction metrics. In quantum key distribution (QKD), however, raw delay-line nonuniformity can affect c...
When level repulsion fails: non-normality and chaos in open quantum systems
Caio B. Naves, Thomas Klein Kvorning, Jonas Larson·Mar 31, 2026
For Hamiltonian systems, level statistics provide a faithful diagnostic of quantum chaos. By analogy, the statistics of the Lindbladian spectrum are often used in open quantum systems, and the Grobe-Haake-Sommers conjecture proposes that systems with...
Optimal Control of Spin Squeezing in 2D Finite-Range Interacting Systems
Ang Li, Ling-Na Wu, Li You·Mar 31, 2026
Spin squeezing serves as both a fundamental witness of quantum entanglement and a critical resource for quantum-enhanced metrology. While generating substantial spin squeezing in finite-range interacting systems remains challenging, such capability i...
Open Quantum Systems from Dynamical Constraints
Yu Su, Yao Wang·Mar 31, 2026
Open quantum systems are traditionally described by decomposing the total Hilbert space into a system and an external environment, linked by an explicit interaction Hamiltonian. We propose an alternative framework in which the environment is not intr...
Entanglement between an NV Center and Chiral Photons in a Topological SWCNT Plasmonic Microtoroid
Fang-Yu Hong·Mar 31, 2026
We present a theoretical proposal for a hybrid solid-state quantum node based on a single nitrogen-vacancy (NV) center coupled to a topological single-walled carbon nanotube (SWCNT) plasmonic microtoroid. The SWCNT ring supports deeply sub-wavelength...
Entanglement in the $θ$-vacuum
Sebastian Grieninger, Dmitri E. Kharzeev, Eliana Marroquin·Mar 31, 2026
We compute the entanglement entropy and the entanglement spectrum of the vacuum state in the massive Schwinger model at a finite $θ$ angle. The $θ$ term is implemented through a chirally rotated lattice Hamiltonian that preserves the periodicity in $...
Pointwise and dynamic programming control synthesis for finite-level open quantum memory systems
Igor G. Vladimirov, Ian R. Petersen, Guodong Shi·Mar 31, 2026
This paper is concerned with finite-level quantum memory systems for retaining initial dynamic variables in the presence of external quantum noise. The system variables have an algebraic structure, similar to that of the Pauli matrices, and their Hei...
Time-resolved role of coherence and delocalization in photosynthetic energy transfer from an extended exciton model
Jingyu Liu, Tao-Yuan Du·Mar 31, 2026
Photosynthetic antenna complexes achieve high quantum efficiency through exciton transport in coupled pigment networks. Conventional Frenkel-exciton models treat each chromophore as a structureless site and neglect internal electronic degrees of free...
Zeno-Constrained Formation of Relativistic Mass Shells
Ansgar Pernice·Mar 30, 2026
We study an extension of the quantum linear Boltzmann equation describing irreversible momentum-space dynamics of an open quantum system under strong continuous monitoring. The monitored observable is taken to be a quadratic form in an extended, pure...
Process-tensor approach to full counting statistics of charge transport in quantum many-body circuits
Hari Kumar Yadalam, Mark T. Mitchison·Mar 30, 2026
We introduce a numerical tensor-network method to compute the statistics of the charge transferred across an interface partitioning an interacting one-dimensional many-body lattice system with $U(1)$ symmetry. Our approach is based on a matrix-produc...
Real Variance-Based Variational Quantum Eigensolver for Non-Hermitian Matrices
Durgesh Pandey, Ankit Kumar Das, P. Arumugam·Mar 30, 2026
Non-Hermitian operators naturally arise in the description of open quantum systems, which exhibit features such as resonances and decay processes, where the associated eigenvalues are complex. Standard quantum algorithms, including the Variational Qu...
Hunting for quantum advantage in electronic structure calculations is a highly non-trivial task
Örs Legeza, Andor Menczer, Miklós Antal Werner +7 more·Mar 30, 2026
In light of major developments over the past decades in both quantum computing and simulations on classical hardware, it is a serious challenge to identify a real-world problem where quantum advantage is expected to appear. In quantum chemistry, elec...
Neural Quantum States in Non-Stabilizer Regimes: Benchmarks with Atomic Nuclei
James W. T. Keeble, Alessandro Lovato, Caroline E. P. Robin·Mar 30, 2026
As neural networks are known to efficiently represent classes of tensor-network states as well as volume-law-entangled states, identifying which properties determine the representational capabilities of neural quantum states (NQS) remains an open que...
Lindbladian Simulation with Commutator Bounds
Xinzhao Wang, Shuo Zhou, Xiaoyang Wang +3 more·Mar 30, 2026
Trotter decomposition provides a simple approach to simulating open quantum systems by decomposing the Lindbladian into a sum of individual terms. While it is established that Trotter errors in Hamiltonian simulation depend on nested commutators of t...
Discriminating idempotent quantum channels
Satvik Singh, Bjarne Bergh·Mar 30, 2026
We study binary discrimination of idempotent quantum channels. When the two channels share a common full-rank invariant state, we show that a simple image inclusion condition completely determines the asymptotic behavior: when it holds, a broad famil...
Quantized Dissipation from the Inverse-Square Anomaly in a Non-Hermitian Klein-Gordon Field
Mansour Haghighat, Ali Nouri·Mar 30, 2026
We construct an exactly solvable relativistic model that embeds the anomalous inverse-square interaction into a non-Hermitian Klein-Gordon field theory through a purely imaginary, scale-invariant scalar potential. The stationary field equation reduce...