Papers

Moisés Bermejo Morán, Abhishek Mishra·Jul 10, 2026

Here we present PCPOP, a Julia package for polynomial optimization that supports non-commutative optimization, tracial polynomial optimization, trace polynomial optimization and state polynomial optimization. PCPOP fully supports exact arithmetic com...

Karl Svozil·Jul 10, 2026

At one frozen setting, the probabilities observed in a sharp quantum context are indistinguishable, as detector-click statistics, from ordinary probabilities on the atoms of a classical partition. But an actual analyzer usually comes with a calibrate...

Qi-Feng Wang, Tian-Yu Han, Ya-Jun Wang +9 more·Jul 10, 2026

Continuous time crystals (CTCs) represent a nonequilibrium quantum phase that spontaneously breaks time-translation symmetry without periodic external driving, manifesting as persistent, long-lived oscillations under steady pumping. The lifetime is c...

Antoine Rignon-Bret, Cyril Elouard·Jul 10, 2026

We build a framework for the thermodynamics of macroscopic quantum systems. In contrast with approaches requiring access to the full density matrix, our framework relies on a coarse-grained description, based on measurement statistics of a few observ...

Mar Yuste, Carlos R. Fernández Pousa, Javier Fraile Peláez +1 more·Jul 10, 2026

We present a quantum mechanical model of dual parallel Mach Zehnder electro-optic modulators (DPMZMs), derived using the quantum scattering formalism [1,2]. We obtain the complete, unrestricted transformation of single-photon and coherent input state...

Zhipeng Chen, Haolun Tang, Xiao-Qi Xiao +1 more·Jul 10, 2026

Quantum identity authentication (QIA) has emerged as a crucial technology for secure communication systems, particularly in the burgeoning era of quantum communications. This paper proposes a novel QIA protocol based on non-classical characteristics ...

Vanessa Sochat, Daniel Milroy·Jul 10, 2026

High Performance Computing (HPC) centers are expanding to encompass resources that extend beyond traditional computing. By extending resources to quantum computing, hybrid quantum-classical workflows tackle complex optimization problems that have nev...

Aruna Gupta, S R Hassan·Jul 10, 2026

The Quantum Approximate Optimization Algorithm (QAOA) is a promising framework for combinatorial optimization, but constrained problems are commonly handled using energetic penalty terms that require calibration and allow infeasible configurations to...

Jiaxin Liu, Zuoxian Wang, Danyue Ma·Jul 10, 2026

We derive three matched speed limits on the purification of a monitored system, valid in every finite dimension and for every strategy and efficiency. All three are set by one functional, the square root of the state's impurity, whose maximal decay r...

Tanapol Nuatho, Narisorn Sangnakara, Prapong Prechaprapranwong +1 more·Jul 10, 2026

Data scarcity and class imbalance are persistent challenges in machine learning that degrade model generalization and introduce predictive bias. We present a hybrid quantum-classical framework for synthetic data generation using a Quantum Circuit Bor...

Akihiro Hokkyo, Hiroyasu Tajima·Jul 10, 2026

Symmetry imposes fundamental constraints on quantum measurement and control. The Wigner-Araki-Yanase theorem and its quantitative extensions capture this restriction for continuous symmetries, in terms of fluctuations of conserved generators. Such ge...

Sho Kubota, Haruhiko Matsubara, Etsuo Segawa·Jul 10, 2026

We define a two-particle quantum walk of identical particles on a graph $G$ via the one-particle Grover walk on the Kronecker product $G \otimes G$, and call it the two-particle Grover walk. In systems of identical particles, quantum mechanics requir...

Huan-Yu Liu, Cheng Xue, Yun-Jie Wang +5 more·Jul 10, 2026

Quantum simulation of open quantum systems in the noisy intermediate-scale quantum (NISQ) era is hindered by the non-unitary nature of dissipative dynamics and the limited quantum resources available on near-term quantum processors. In this work, we ...

Songyi Liu, Yongjun Wang, Baoshan Wang +2 more·Jul 10, 2026

Incompatibility constitutes a fundamental aspect of quantum mechanics. However, not every quantum observable non-classical property arises from incompatibility, nor can all quantum scenarios be fully captured by incompatibility alone. Within the fram...

Haruki Emori, Atsushi Iriki, Andrei Khrennikov +1 more·Jul 10, 2026

Quantum logic is usually presented as a non-classical departure from ordinary reasoning forced on us by quantum mechanics, with classical logic kept as the secure starting point. We argue for the opposite order of explanation in a finite and fully co...

Saumya Brahmbhatt, Mitali Hukkeri, Dongchan Kim +2 more·Jul 10, 2026

In quantum programs, Bugs4Q is a widely used benchmark containing real quantum defects. However, its evaluation assumes that benchmark labels remain valid and that generated fixes execute in the target environment. We evaluate two Bugs4Q versions con...

Vridhi Jain, Lei Zhang·Jul 10, 2026

Accurate noise classification is essential for operating near-term quantum processors, yet existing approaches, such as quantum process tomography, scale exponentially with system size, limiting their practicality for routine calibration. We propose ...

Lia Suci Waliani, Georges Kaddoum, Mahdi Chehimi +1 more·Jul 9, 2026

Quantum teleportation (QT) over satellite-based free-space optical (FSO) channels is a promising approach for long-distance quantum communication. However, its performance is significantly degraded by atmospheric loss and turbulence. In this paper, w...

Reuben Demirdjian, Yvan Quinn, Vincent P. Su +2 more·Jul 9, 2026

Efficiently solving nonlinear ordinary and partial differential equations using a quantum computer is a major challenge due its inherent linearity. To circumvent this challenge, the Carleman linearization method has been proposed to transform a nonli...

Anshumitra Baul, Xiao Xiao, Phillip C. Lotshaw·Jul 9, 2026

Quantum phase transitions in many-body systems give rise to highly entangled states, and understanding their quantum correlations is crucial for characterizing quantum materials. However, traditional entanglement measures such as entanglement entropy...