Quantum

Paper

Monte Carlo Simulation of Operator Dynamics and Entanglement in Dual-Unitary Circuits

Menghan Song, Zhaoyi Zeng, Ting-Tung Wang, Yi-Zhuang You, Zi Yang Meng, and Pengfei Zhang,

Quantum 9, 1681 (2025).

We investigate operator dynamics and entanglement growth in dual-unitary circuits, a class of locally scrambled quantum systems that enables efficient simulation beyond the exponential compl…

Paper

Operational Quantum Reference Frame Transformations

Titouan Carette, Jan Glowacki, and Leon Loveridge,

Quantum 9, 1680 (2025).

Quantum reference frames are needed in quantum theory for much the same reasons that reference frames are in classical theories: to manifest invariance in line with fundamental relativity pr…

Paper

On the Computational Hardness of Quantum One-Wayness

Bruno Cavalar, Eli Goldin, Matthew Gray, Peter Hall, Yanyi Liu, and Angelos Pelecanos,

Quantum 9, 1679 (2025).

There is a large body of work studying what forms of computational hardness are needed to realize classical cryptography. In particular, one-way functions and pseudorandom generators can be…

Paper

Entanglement of Disjoint Intervals in Dual-Unitary Circuits: Exact Results

Alessandro Foligno and Bruno Bertini,

Quantum 9, 1678 (2025).

The growth of the entanglement between two disjoint intervals and its complement after a quantum quench is regarded as a dynamical chaos indicator. Namely, it is expected to show qualitative…

Paper

Mpemba effect and super-accelerated thermalization in the damped quantum harmonic oscillator

Stefano Longhi,

Quantum 9, 1677 (2025).

The behavior of systems far from equilibrium is often complex and unpredictable, challenging and sometimes overturning the physical intuition derived from equilibrium scenarios. One striking…

Paper

Fault-tolerant Quantum Error Correction Using a Linear Array of Emitters

Jintae Kim, Jung Hoon Han, and Isaac H. Kim,

Quantum 9, 1676 (2025).

We propose a fault-tolerant quantum error correction architecture consisting of a linear array of emitters and delay lines. In our scheme, a resource state for fault-tolerant quantum computa…

Paper

Transformer neural networks and quantum simulators: a hybrid approach for simulating strongly correlated systems

Hannah Lange, Guillaume Bornet, Gabriel Emperauger, Cheng Chen, Thierry Lahaye, Stefan Kienle, Antoine Browaeys, and Annabelle Bohrdt,

Quantum 9, 1675 (2025).

Owing to their great expressivity and versatility, neural networks have gained attention for simulating large two-dimensional quantum many-body systems. However, their expressivity comes wit…

Paper

Quantum Algorithms for the Pathwise Lasso

Joao F. Doriguello, Debbie Lim, Chi Seng Pun, Patrick Rebentrost, and Tushar Vaidya,

Quantum 9, 1674 (2025).

We present a novel quantum high-dimensional linear regression algorithm with an $\ell_1$-penalty based on the classical LARS (Least Angle Regression) pathwise algorithm. Similarly to available…

Paper

Low-overhead non-Clifford fault-tolerant circuits for all non-chiral abelian topological phases

Andreas Bauer,

Quantum 9, 1673 (2025).

We propose a family of explicit geometrically local circuits on a 2-dimensional planar grid of qudits, realizing any abelian non-chiral topological phase as an actively error-corrected fault…

Paper

Multi-Armed Bandits and Quantum Channel Oracles

Simon Buchholz, Jonas M. Kübler, and Bernhard Schölkopf,

Quantum 9, 1672 (2025).

Multi-armed bandits are one of the theoretical pillars of reinforcement learning. Recently, the investigation of quantum algorithms for multi-armed bandit problems was started, and it was fo…

Paper

Dipole-dipole interactions mediated by a photonic flat band

Enrico Di Benedetto, Alejandro Gonzalez-Tudela, and Francesco Ciccarello,

Quantum 9, 1671 (2025).

Flat bands (FBs) are energy bands with zero group velocity, which in electronic systems were shown to favor strongly correlated phenomena. Indeed, a FB can be spanned with a basis of strictl…

Paper

Wavefunction branching: when you can’t tell pure states from mixed states

Jordan K. Taylor and Ian P. McCulloch,

Quantum 9, 1670 (2025).

We propose a definition of wavefunction "branchings": quantum superpositions which can't be feasibly distinguished from the corresponding mixed state, even under time evolution. Our definiti…

Paper

Solving lattice gauge theories using the quantum Krylov algorithm and qubitization

Lewis W. Anderson, Martin Kiffner, Tom O’Leary, Jason Crain, and Dieter Jaksch,

Quantum 9, 1669 (2025).

Computing vacuum states of lattice gauge theories (LGTs) containing fermionic degrees of freedom can present significant challenges for classical computation using Monte-Carlo methods. Quant…

Paper

Tensor Product Structure Geometry under Unitary Channels

Faidon Andreadakis and Paolo Zanardi,

Quantum 9, 1668 (2025).

In quantum many-body systems, complex dynamics delocalize the physical degrees of freedom. This spreading of information throughout the system has been extensively studied in relation to qua…

Paper

Solving Caldeira-Leggett Model by Inchworm Method with Frozen Gaussian Approximation

Geshuo Wang, Siyao Yang, and Zhenning Cai,

Quantum 9, 1667 (2025).

We propose an algorithm that combines the inchworm method and the frozen Gaussian approximation to simulate the Caldeira-Leggett model in which a quantum particle is coupled with thermal har…

Paper

Local Purity Distillation in Quantum Systems: Exploring the Complementarity Between Purity and Entanglement

Ray Ganardi, Piotr Masajada, Moein Naseri, and Alexander Streltsov,

Quantum 9, 1666 (2025).

Quantum thermodynamics and quantum entanglement represent two pivotal quantum resource theories with significant relevance in quantum information science. Despite their importance, the intri…

Category: Paper