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๐Ÿ” andrej singer ๐Ÿ“‚ Physics
Showing 9419 results for "andrej singer" in Physics
Physics Preprint PDF DOI

Pauli equation in spaces of constant curvature and extended Nikiforov-Uvarov method

Abdaljalel E. Alizzi, Zurab K. Silagadze ยท 2026

We apply the extended Nikiforov-Uvarov method to the non-relativistic limit of the Dirac equation with a Coulomb potential in spaces of constant curvature. In this case, the radial equation reduces toโ€ฆ

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Intermediate-state Coulomb-corrected strong-field approximation for rescattering processes

Chunli Miao, Jiarui Qin, Chan Li, Xiaolei Hao, Weidong Li, Jing Chen ยท 2026

We analytically derive the all-order strong-field S-matrix series incorporating intermediate-state Coulomb-Volkov corrections (ICSFA). Focusing on rescattering processes described by the second-order โ€ฆ

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Transport characteristics of bulk and edge states in an off-diagonal Aubry--Andr\'e--Harper chain

Moumita Patra ยท 2026

We investigate quantum transport in an off-diagonal Aubry--Andr\'e--Harper chain. The periodic hopping modulation generates effective internal boundaries that strongly influence the transmission charaโ€ฆ

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Least constraint approach to non-relativistic quantum mechanics

Ning Liu ยท 2026

We formulate a variational principle for non-relativistic quantum mechanics inspired by Gauss's principle of least constraint. We define a quantum constraint functional as the probability-weighted squโ€ฆ

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Characterization of Thermalization Behaviour in a Generalized Aubry-Andr\'e Model

S. Mal, D. K. Nandy, B. K. Sahoo ยท 2026

Although random matrix theory provides a fundamental framework for characterizing quantum chaos, encompassing both ergodic and localized phases, a comprehensive understanding of the universal featuresโ€ฆ

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Gate-dependent offset charge shifts and anharmonicity in gatemon qubits in the weak tunneling regime

Utkan Gungordu, Rusko Ruskov, Silas Hoffman, Kyle Serniak, Andrew J. Kerman, Charles Tahan ยท 2026

Gatemon qubits are based on a superconductor-quantum dot-superconductor (S-QD-S) junction which enables in situ electrostatic tuning via a gate electrode. For a single-channel QD this structure gives โ€ฆ

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Non-unitary extension of Grover's search algorithm

V.N.A. Lula-Rocha, M.A.S. Trindade ยท 2026

We have developed a non-unitary extension of Grover's search algorithm by changing the hidden geometry of Hilbert space carried by diffusion operator. Our algorithm finds the solution for search problโ€ฆ

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Strain engineering of Andreev spin qubits in Germanium

Vittorio Coppini, Patrick Del Vecchio, Antonio L. R. Manesco, Anton Akhmerov, Valla Fatemi, Bernard van Heck, Stefano Bosco ยท 2026

Planar germanium heterostructures are promising hosts for hybrid quantum devices due to their compatibility with superconductors, low material disorder, and relaxed fabrication constraints. Also, the โ€ฆ

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The Lieb-Liniger model

Zoran Ristivojevic ยท 2026

The Lieb-Liniger model describes one-dimensional bosons with contact interactions. This many-body system admits an exact solution in terms of the Bethe ansatz. Some of the exact and perturbative resulโ€ฆ

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Floquet mobility edges and transport in a periodically driven generalized Aubry-Andr\'e model

Jayashis Das, Vatsana Tiwari, Manish Kumar, Auditya Sharma ยท 2026

We investigate the effect of a periodic electric field drive on the generalized Aubry-Andr\'e model, also known as the Ganeshan-Pixley-Das Sarma (GPD) model, which is well known as a host of mobility โ€ฆ

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Multi-Nucleon Transfer Reactions and the Creation and the Evolution of the Compound Nucleus

Matthew Kafker, Aurel Bulgac ยท 2026

There is no microscopic quantum approach based on the time-dependent Schr\"{o}dinger equation which has yet to describe the formation of a compound nucleus. The most advanced microscopic approach deveโ€ฆ

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Tailoring Germanium Heterostructures for Quantum Devices with Machine Learning

Patrick Del Vecchio, Kevin Rossi, Giordano Scappucci, Stefano Bosco ยท 2026

Germanium (Ge) quantum wells are emerging as versatile platforms for quantum devices, supporting high-quality spin qubits and integration with superconducting leads. These applications benefit from stโ€ฆ

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AI models of unstable flow exhibit hallucination

Ramdhan Wibawa, Birendra Jha ยท 2026

We report the first systematic evidence of hallucination in AI models of fluid dynamics, demonstrated in the canonical problem of hydrodynamically unstable transport known as viscous fingering. AI-basโ€ฆ

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Operational criterion for Wigner function negativity

Paolo Solinas, Beatrice Donelli, Stefano Gherardini ยท 2026

We introduce an operational criterion to identify Wigner function (WF) negativity for an arbitrary quantum state within the framework of quantum non-demolition measurements. This criterion correspondsโ€ฆ

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$0-\pi$ transitions in non-Hermitian magnetic Josephson junctions

Roberto Capecelatro, Marco Marciani, Claudio Guarcello, Gabriele Campagnano, Procolo Lucignano, Roberta Citro ยท 2026

We study the transport properties of non-Hermitian magnetic Josephson junctions, considering a superconductor-quantum dot-superconductor device coupled to a ferromagnetic metallic reservoir in the preโ€ฆ

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Monte Carlo Study of the Phase Transition of the $XY$ Model on a Diamond Lattice

Sena Watanabe, Yukitoshi Motome, Haruki Watanabe ยท 2026

We study the phase transition of the classical $XY$ model on a diamond lattice by Monte Carlo simulations using the Wolff cluster algorithm. Finite-size scaling (FSS) analysis of the Binder cumulant aโ€ฆ

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Nonequilibrium Cooper quartet generation in superconducting devices

Luca Chirolli, Alessandro Braggio, Michele Governale ยท 2026

Cooper quartets are aggregates of four electrons that generalize the concept of Cooper pairs, and their study can unfold unexplored perspectives in correlated matter and many-body physics. We propose โ€ฆ

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A Practical Semi-Quantum Signature Protocol with Improved Eavesdropping Detection

Zengyu Pang, Hua Xiang ยท 2026

Semi-quantum signature (SQS) schemes aim to enable quantum signature functionality in scenarios where only a subset of participants possess full quantum capabilities, thereby improving practical deploโ€ฆ

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Phase Transitions as the Breakdown of Statistical Indistinguishability

Taiyo Narita, Hideyuki Miyahara ยท 2026

We introduce a novel characterization of phase transitions based on hypothesis testing. In our formulation, a phase transition is defined as the breakdown of statistical indistinguishability under vโ€ฆ

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Orkan: Cache-friendly simulation of quantum operations on hermitian operators

Timo Ziegler ยท 2026

Classical simulation of quantum operations is essential for algorithm design, noise characterisation, and benchmarking of quantum hardware. The most general physically realisable operation can be descโ€ฆ

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