Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Emergent non-Markovianity in time-delayed waveguide QED
Debsuvra Mukhopadhyay, Stuart J. Masson·Aug 26, 2026
Quantum systems are invariably coupled to a surrounding environment. A common theoretical method to simplify the problem is to trace over the environment under a Markov approximation, which assumes that the environment holds no memory over the timesc...
The Role of Geometric Analysis in Interferometer Design and Optimization for Gravitational Quantum Entanglement
Alireza Maleki·Aug 26, 2026
The pursuit of a quantum theory of gravity, aiming to unify general relativity and quantum mechanics, remains one of the most enduring challenges in physics. Because of the extreme energy scales associated with the Planck regime, direct experimental ...
Recovery-Free CHSH Nonlocality with Particle Loss
Giovanni Scala, Cosmo Lupo·Aug 26, 2026
Can CHSH nonlocality survive particle loss without applying an explicit recovery operation? In principle, any deterministic recovery can be absorbed into the measurement. Operationally, we show that the answer depends on the allowed measurements on t...
Large Deviations for the Bose--Einstein Condensate of the Ideal Gas in the Canonical Ensemble
Andreas Deuchert, Xuanyu Li·Aug 26, 2026
We consider a non-interacting Bose gas governed by a general one-particle Hamiltonian in the canonical ensemble. Our main results are large-deviation estimates for the number of particles in the Bose--Einstein condensate. We show that the left- and r...
The Capacity of Entanglement and Holographic Entropies at Finite Resources
Ning Bao, Jacob March·Aug 26, 2026
The Ryu-Takayanagi formula equates the area of a minimal surface with the von Neumann entropy of a boundary subregion, and leaves two things about that identification open. The first is how sharply a geometry fixes an entropy. Fannes-Audenaert answer...
Misunderstanding Convivial Solipsism: the Necessity of a Perspectival Logic
Herve Zwirn·Aug 26, 2026
Convivial Solipsism is easily misunderstood. Because it denies the absoluteness of observed events while preserving the universality of quantum mechanics, it invites objections that are often formulated in a classical, non-perspectival language. Such...
Enhancing the phase sensitivity of a Mach-Zehnder interferometer beyond the Heisenberg limit through dynamic squeezing
Lakshya Bhardwaj, Ankit Tiwari, Mohan Sarovar +1 more·Aug 26, 2026
We propose a method to enhance the phase sensitivity of a Mach-Zehnder interferometer, independent of its input states. This is achieved by applying squeezing sequences to one arm of the interferometer. By alternating between squeezing along orthogon...
An Economic Analysis of DNA-based Data Storage Systems
Alex El-Shaikh, Bernhard Seeger, Thomas Heinis·Aug 26, 2026
Deoxyribonucleic acid (DNA) remains stable for millennia without degradation, can store information at densities orders of magnitude higher than current technologies, and is environmentally friendly due to its low energy requirement. While these adva...
Exploiting overcompleteness of Platonic-solid POVMs for shadow estimation
Dario Melegari, Stefano Mangini, Keijo Korhonen +2 more·Aug 26, 2026
Accurately estimating expectation values of observables from a finite number of measurement shots is a central challenge in quantum information science. Informationally overcomplete measurements provide a route to reduce estimation variance through o...
Quantizing the guiding center: do quantization and coarse graining commute?
Rodrigo Andrade e Silva, Ted Jacobson·Aug 26, 2026
We develop a nonperturbative, group-theoretic quantization of the effective guiding center theory of a charged particle drifting in a magnetic field in two spatial dimensions, and compare the resulting quantum theory with a corresponding coarse grain...
Fault-tolerant quantum computation cannot be achieved with constant spacetime overhead
Kishor Bharti, Tobias Haug, Andrew Tanggara·Aug 26, 2026
The threshold theorem states that quantum computations can be made reliable below a physical error threshold, at the cost of additional physical qubits and circuit depth. Recent work has reduced these space and time overheads to polylogarithmic or ne...
How quantum is quantum geometry?
Ady Stern, Felix von Oppen·Aug 26, 2026
The quantum geometric tensor - the Berry curvature together with the quantum metric - now underlies a long list of observables, from the anomalous Hall effect to the superfluid weight of a flat band. We ask which of these observables actually require...
Bosonic Encodings for Hermite-Galerkin Discretizations of High-Dimensional PDEs and Bayesian Inverse Problems
Alice Barthe·Aug 26, 2026
The Koopman-von Neumann framework has been proposed to design quantum algorithms for non-linear dynamics. It maps a non-linear ordinary differential equation to a linear partial differential equation (PDE) governing a probability amplitude. Previous ...
Lieb-Schultz-Mattis Constraints for Quantum Channels: A Spacetime-Duality View
Sarang Gopalakrishnan, Yu-Jie Liu, Tsung-Cheng Lu +2 more·Aug 26, 2026
Quantum anomalies strongly constrain the possible behavior of many-body systems. A prime example is the Lieb-Schultz-Mattis (LSM) theorem, which relates UV symmetry and filling constraints to IR features of the energy spectrum and ground-state struct...
Least Variable Quantum Counting Processes
Bita Olamaei, Florian Meier, Costantino Budroni +2 more·Aug 26, 2026
Counting processes provide a fundamental description of stochastic events ranging from photon detection to clock ticks. A central question is how accurately such events can be timed when only finite memory resources are available. Here, we investigat...
Fast GHZ encoding with $1-o(1)$ fidelity
Laura Shou, T. C. Mooney, Twesh Upadhyaya +1 more·Aug 26, 2026
We prove that $(1-o(1))$-fidelity $N$-qubit Greenberger--Horne--Zeilinger (GHZ) encoding can be performed in time $O(\log N/N)$ using all-to-all 2-local Hamiltonians with bounded 2-qubit interaction terms. This saturates the theoretical lower bound $...
Exact analytical spectrum, eigenstates, and quantum geometry of the quarter-flux Harper-Hofstadter model
Isaac Tesfaye, André Eckardt·Aug 26, 2026
Quantum geometry has emerged as a guiding principle across atomic and condensed-matter physics, shaping the topological responses of Bloch bands and the stability of the correlated phases they host. Beyond two-band models, however, closed-form expres...
Torsion balances as operational probes of semiclassical gravity: Matched-filter bounds, torque-diffusion constraints, and quantum-noise benchmarks
Jyotirmaya Mohanta, Yutaka Shikano·Aug 26, 2026
Calibrated torsion-balance spectra constrain deterministic and stochastic deviations from standard Newtonian gravity. Using one-sided spectra, we derive a calibrated angle-equivalent noise budget and finite-time matched-filter/Cramér-Rao bounds for k...
MyoMechanix: Biomechanically-Grounded Compositional Skilled Activity Understanding and Coaching
Hao Yin, Paritosh Parmar, Lijun Gu +6 more·Aug 26, 2026
Existing action quality assessment (AQA) datasets and methods rely primarily on visual inputs such as RGB and pose, overlooking physiological dynamics such as muscle mechanics and often modeling actions as monolithic patterns. These limitations hinde...
Yang-Lee Criticality as a Dissipative Dynamical Phase Transition: Quantum Simulation of non-Hermitian Physics without Post-selection
Stephen W. Yan·Aug 26, 2026
We show that the $d+0$-dimensional Yang-Lee theory describing classical Ising spins in an imaginary magnetic field can be realized, without post-selection, within a $(d-1)+1$ open quantum system whose dynamics consist of local unitaries and engineere...