Papers
Live trends in quantum computing research, updated daily from arXiv.
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Floquet framework for driven polar quantum systems
Viktor Novičenko, Piotr Gładysz, Karolina Słowik +1 more·Jun 17, 2026
We present an analytical and numerical Floquet treatment of a driven polar two-level quantum system characterized by both longitudinal and transverse coupling to a periodic field. Analytically, we derive a dressed-frame effective Hamiltonian up to fi...
Exclusion Statistics as a Thermodynamic Resource in Quantum Heat Engines
Sampurna Karmakar, Aziz Hasan, Sourin Das·Jun 17, 2026
The maximum power extractable from a quantum thermoelectric heat engine operating with free fermion carriers is bounded by the universal Whitney limit, $P_{\text{fermion}}^{\max} \simeq 0.0321π^2 k_B^2(T_L-T_R)^2/h$. We demonstrate that this bound is...
Random-matrix reduction in projective quantum mechanics: Numerical simulations
Alexey A. Kryukov·Jun 17, 2026
We present numerical simulations supporting the random-matrix state-reduction framework developed in the companion theoretical paper. The simulations test the main derived features of the model: isotropic diffusion generated by Gaussian Unitary Ensem...
Random-matrix reduction in projective quantum mechanics
Alexey A. Kryukov·Jun 17, 2026
We develop a state-space geometric framework for measurement, classicality, and quantum paradoxes, based on one dynamical conjecture. Classical configuration space and classical phase space for a mechanical system arise as distinguished submanifolds ...
Quantum-Classical Auxiliary-Field Quantum Monte Carlo at the Edge of Practicability
Francesco Nappi, Matthew Kiser, Fedor Šimkovic·Jun 17, 2026
We introduce algorithmic improvements to quantum-classical auxiliary-field quantum Monte Carlo (QC-AFQMC) that reduce the dominant per-step classical scaling from $\tilde{\mathcal{O}}(N^{5.5})$ to $\tilde{\mathcal{O}}(N^{4.5})$ as a function of the n...
Spontaneous parametric down-conversion pumped by spatiotemporal structured light
Lukas Montenegro, Rafael F. Barros·Jun 17, 2026
Here we investigate the all-optical control of spectral correlations in spontaneous parametric down-conversion. We show that when photon pairs are projected onto high-order spatial modes, the spatial structure of the pump field defines the phase-matc...
Mapping the non-equilibrium interacting Anderson Impurity Model to an effective Gaussian theory
Emmanuel Bogacz, Graham Kells, Andrew K. Mitchell·Jun 17, 2026
Quantum impurity models with strong electron correlations, such as the paradigmatic Anderson Impurity Model (AIM), are central to our understanding of a range of physical phenomena including local moment formation, Coulomb blockade and Kondo screenin...
Blind Symmetry Matching in Quantum States with Application to Shot-Count Reduction
Mitchell A. Thornton·Jun 17, 2026
Measuring a quantum computation in a basis adapted to a symmetry it carries reduces the repeated measurements, commonly referred to as ``shots'', needed to read a statistical answer. Detecting the symmetry a quantum state carries has many uses: certi...
When Isolated Quantum Systems Appear Classical
Thiago R. de Oliveira, Pedro S. Correia, Tiago Debarba +3 more·Jun 17, 2026
The emergence of classical behavior and the origin of thermal equilibrium are two central problems in the foundations of physics. In the standard accounts, both phenomena are typically explained through interactions with an external environment: deco...
Quantum magic is necessary but not sufficient for wormhole-inspired teleportation
Sudhanva Joshi, Sunil Kumar Mishra·Jun 17, 2026
We investigate the dynamics of Quantum magic, formally known as non-stabilizerness, quantified by the stabilizer Rényi entropy (SRE), across the stages of the wormhole-inspired teleportation protocol (WITP) in the Sachdev-Ye-Kitaev (SYK) model. By tr...
Quantum Pump Depletion and Multicomponent Schrödinger-Cat-Like States in Doubly Pumped Intraresonance Kerr Microresonators
Ranjit Singh, Alexander E. Teretenkov·Jun 17, 2026
We investigate quantum pump depletion and non-Gaussian state generation in doubly pumped Kerr microresonators operating in the intraresonance regime. The pump modes are treated quantum mechanically rather than as undepleted classical amplitudes, allo...
Matrix Product Operators In The Age of Block Encoding
Eugene Dumitrescu·Jun 17, 2026
We develop a block-encoding compiler that speeds up linear combination of unitaries Hamiltonian simulation programs by treating matrix product operators as compressed, virtual-path LCU programs. In showing how these new conditional PREP and SELECT st...
Scalable quantum circuit knitting using a weak-coupling approximation
John P. T. Stenger, Daniel Gunlycke, Nikos Chrisochoides·Jun 17, 2026
We present a method for performing distributed quantum computing with controlled approximations. Exact distributed quantum computing requires exponential classical information to reconstruct the quantum process. However, we show how the classical cos...
Contextuality as a Diagnostic of Translation-Symmetry Breaking in Translation-Invariant 1D Hamiltonians
Xiao Zeng, Kaiyan Yang, Lingxia Zhang +1 more·Jun 17, 2026
Bell- and contextuality-type inequalities have become practical probes of many-body quantum correlations, often involving only few-body correlators and quantities with a direct Hamiltonian interpretation such as an energy density. Here we show that, ...
Nonequilibrium steady states induced by stochastic mid-circuit measurements and resets on a quantum computer
Jakob Murauer, Sabine Tornow, Gabriele Perfetto·Jun 17, 2026
Stochastic resetting has emerged as a versatile protocol to drive quantum many-body systems to non-equilibrium steady states by interspersing unitary dynamics with measurements and resets at random times. In spite of this, a quantum hardware validati...
Quantum circuit decomposition of the tangent-fermion Dirac operator
C. W. J. Beenakker·Jun 17, 2026
The Dirac operator on a lattice cannot be both local and free of fermion doubling, at least not without breaking fundamental symmetries. Non-local, symmetry-preserving discretizations that avoid doubling have a quantum circuit representation as a lin...
Coherent Microwave Control of Optically Addressable Donor Qubits in ZnO
Ethan R. Hansen, Dong-Rong Wu, Yixuan Li +6 more·Jun 17, 2026
Optically addressable shallow donors in ZnO combine efficient spin-selective optical transitions with the potential for long spin coherence in an isotopically purifiable host lattice, making them an attractive platform for spin-photon quantum technol...
A quantum-like model of political consensus via non self-adjoint Hamiltonians
Fabio Bagarello, Gloria Liarda·Jun 17, 2026
We discuss here how non self-adjoint Hamiltonians, and their related Heisenberg-like dynamics, can be used to model a political system consisting in a coalition $\C$ of different parties (forming a government) and by their (original) supporters $\Sc$...
Measurement-enabled online quantum processing with amplitude encoding
Giacomo Franceschetto, Pere Mujal, Rodrigo Martínez-Peña·Jun 17, 2026
We introduce a quantum reservoir computing online protocol that realizes amplitude encoding on quantum hardware. Our scheme combines mid-circuit measurement and reset operations to implement the partial-trace dynamics underlying amplitude encoding, w...
Probing chaos and thermalization through out-of-time-ordered correlators in random field spin chains
C Jisha, Shivam Mishra, Ravi Prakash·Jun 17, 2026
Out-of-time-ordered correlators (OTOCs) have emerged as a diagnostic of information scrambling and quantum chaos in many-body systems. We investigate the imprints of chaos in the dynamics of OTOCs in the Heisenberg spin-$1/2$ chain with random fields...