Monogamy of Entanglement Bounds and Improved Approximation Algorithms for Qudit Hamiltonians

Zackary Jorquera, Alexandra Kolla, Steven Kordonowy, Juspreet Singh Sandhu, and Stuart Wayland,

Quantum 10, 2088 (2026).

We prove new monogamy of entanglement bounds for two-local qudit Hamiltonians of rank-one projectors without one-local terms. In particular, we certify the maximum energy in terms of the max…

Raúl Morral-Yepes, Marc Langer, Adam Gammon-Smith, Barbara Kraus, and Frank Pollmann,

Quantum 10, 2087 (2026).

In unitary circuit games, two competing parties, an "entangler" and a "disentangler", can induce an entanglement phase transition in a quantum many-body system. The transition occurs at a ce…

Andreas Elben and Benoit Vermersch,

Quantum 10, 2086 (2026).

We introduce $\texttt{RandomMeas.jl}$, a modular and high-performance open-source software package written in Julia for implementing and analyzing randomized measurement protocols in quantum c…

Dolf Huybrechts and Tommaso Roscilde,

Quantum 10, 2085 (2026).

The coupling of a quantum system to an environment leads generally to decoherence, and it is detrimental to quantum correlations within the system itself. Yet some forms of quantum correlati…

Konrad Schlichtholz, Bianka Woloncewicz, Tamoghna Das, Marcin Markiewicz, and Marek Żukowski,

Quantum 10, 2084 (2026).

The question of “non-locality of a single photon'', which started with a paper by Tan, Walls and Collett (TWC, 1991) stirred a thirty years long debate. This hampered attempts to use the TWC…

Nouédyn Baspin and Dominic Williamson,

Quantum 10, 2083 (2026).

Quantum information is fragile and must be protected by a quantum error-correcting code for large-scale practical applications. Recently, highly efficient quantum codes have been discovered…

Adrien Kahn, Luca Gravina, and Filippo Vicentini,

Quantum 10, 2082 (2026).

We present a formalism that allows for the direct manipulation and optimization of subspaces, circumventing the need to optimize individual states when using subspace methods. Using the dete…

Florian Bönsel, Flore K. Kunst, and Federico Roccati,

Quantum 10, 2081 (2026).

Waveguide quantum electrodynamics (QED) provides a powerful framework for engineering quantum interactions, traditionally relying on periodic photonic arrays with continuous energy bands. He…

Clara Wassner, Tommaso Guaita, Jens Eisert, and Jose Carrasco,

Quantum 10, 2080 (2026).

Holonomic quantum computation exploits the geometric evolution of eigenspaces of a degenerate Hamiltonian to implement unitary evolution of computational states. In this work we introduce a…

Zhi-Yuan Wei and Daniel Malz,

Quantum 10, 2079 (2026).

We introduce parallel-sequential (PS) circuits, a family of quantum circuit layouts that interpolate between brickwall and sequential circuits, which introduces control parameters governing…

Julia Mathé, Ayaka Usui, Otfried Gühne, and Giuseppe Vitagliano,

Quantum 10, 2078 (2026).

We discuss the estimation of the distance of a given mixed many-body quantum state to the set of fully separable states, applied to the concrete scenario of collective spin states. Concretel…

Julie A. Campos and Kenneth R. Brown,

Quantum 10, 2073 (2026).

We can design efficient quantum error-correcting (QEC) codes by tailoring them to our choice of quantum architecture. Useful tools for constructing such codes include Clifford deformations a…