Quantum

Paper

Trainability and Expressivity of Hamming-Weight Preserving Quantum Circuits for Machine Learning

Léo Monbroussou, Eliott Z. Mamon, Jonas Landman, Alex B. Grilo, Romain Kukla, and Elham Kashefi,

Quantum 9, 1745 (2025).

Quantum machine learning (QML) has become a promising area for real world applications of quantum computers, but near-term methods and their scalability are still important research topics.…

Paper

On noise in swap ASAP repeater chains: exact analytics, distributions and tight approximations

Kenneth Goodenough, Tim Coopmans, and Don Towsley,

Quantum 9, 1744 (2025).

Losses are one of the main bottlenecks for the distribution of entanglement in quantum networks, which can be overcome by the implementation of quantum repeaters. The most basic form of a qu…

Paper

Quantum detailed balance via elementary transitions

Rocco Duvenhage, Kyle Oerder, and Keagan van den Heuvel,

Quantum 9, 1743 (2025).

Quantum detailed balance is formulated in terms of elementary transitions, in close analogy to detailed balance in a classical Markov chain on a finite set of points. An elementary transitio…

Paper

Stochastic resetting in discrete-time quantum dynamics: steady states and correlations in few-qubit systems

Sascha Wald, Louie Hong Yao, Thierry Platini, Chris Hooley, and Federico Carollo,

Quantum 9, 1742 (2025).

Time evolution in several classes of quantum devices is generated through the application of quantum gates. Resetting is a critical technological feature in these systems allowing for mid-ci…

Paper

Quantum and classical algorithms for nonlinear unitary dynamics

Noah Brustle and Nathan Wiebe,

Quantum 9, 1741 (2025).

Quantum algorithms for Hamiltonian simulation and linear differential equations more generally have provided promising exponential speed-ups over classical computers on a set of problems wit…

Paper

Interplay between external driving, dissipation and collective effects in the Markovian and non-Markovian regimes

Roie Dann,

Quantum 9, 1740 (2025).

Understanding how external driving and dissipation jointly influence the dynamics of open quantum systems is essential for advancing the study of non-equilibrium quantum phenomena and develo…

Paper

Learning Quantum Processes with Quantum Statistical Queries

Chirag Wadhwa and Mina Doosti,

Quantum 9, 1739 (2025).

In this work, we initiate the study of learning quantum processes from quantum statistical queries. We focus on two fundamental learning tasks in this new access model: shadow tomography of…

Paper

Non-onsite symmetries and quantum teleportation in split-index matrix product states

David T. Stephen,

Quantum 9, 1738 (2025).

We describe a class of spin chains with new physical and computational properties. On the physical side, the spin chains give examples of symmetry-protected topological phases that are defin…

Paper

A Quadratic Speedup in Finding Nash Equilibria of Quantum Zero-Sum Games

Francisca Vasconcelos, Emmanouil-Vasileios Vlatakis-Gkaragkounis, Panayotis Mertikopoulos, Georgios Piliouras, and Michael I. Jordan,

Quantum 9, 1737 (2025).

Recent developments in domains such as non-local games, quantum interactive proofs, and quantum generative adversarial networks have renewed interest in quantum game theory and, specifically…

Paper

Quantum network-entanglement measures

Zhen-Peng Xu, Julio I. de Vicente, Liang-Liang Sun, and Sixia Yu,

Quantum 9, 1736 (2025).

Quantum networks are of high interest nowadays and a quantum internet has been long envisioned. Network-entanglement adapts the notion of entanglement to the network scenario and network-ent…

Paper

Memory attacks in network nonlocality and self-testing

Mirjam Weilenmann, Costantino Budroni, and Miguel Navascues,

Quantum 9, 1735 (2025).

We study what can or cannot be certified in communication scenarios where the assumption of independence and identical distribution (iid) between experimental rounds fails. In this respect,…

Paper

An Effective Way to Determine the Separability of Quantum State

Ma-Cheng Yang and Cong-Feng Qiao,

Quantum 9, 1734 (2025).

We propose in this work a practical approach to address the longstanding and challenging problem of quantum separability, leveraging the correlation matrices of generic observables. General…

Paper

Multidimensional Electrical Networks and their Application to Exponential Speedups for Graph Problems

Jianqiang Li and Sebastian Zur,

Quantum 9, 1733 (2025).

Recently, Apers and Piddock [TQC '23] strengthened the connection between quantum walks and electrical networks via Kirchhoff's Law and Ohm's Law. In this work, we develop a new multidimensi…

Paper

Accurately Simulating the Time Evolution of an Ising Model with Echo Verified Clifford Data Regression on a Superconducting Quantum Computer

Tim Weaving, Alexis Ralli, Peter J. Love, Sauro Succi, and Peter V. Coveney,

Quantum 9, 1732 (2025).

We present an error mitigation strategy composed of Echo Verification (EV) and Clifford Data Regression (CDR), the combination of which allows one to learn the effect of the quantum noise ch…

Paper

Speeding up Quantum Annealing with Engineered Dephasing

Mykolas Sveistrys, Josias Langbehn, Raphaël Menu, Steve Campbell, Giovanna Morigi, and Christiane P. Koch,

Quantum 9, 1731 (2025).

Building on the insight that engineered noise, specifically, engineered dephasing can enhance the adiabaticity of controlled quantum dynamics, we investigate how a dephasing-generating coupl…

Paper

Pauli path simulations of noisy quantum circuits beyond average case

Guillermo González-García, J. Ignacio Cirac, and Rahul Trivedi,

Quantum 9, 1730 (2025).

For random quantum circuits on $n$ qubits of depth $\Theta(\log n)$ with depolarizing noise, the task of sampling from the output state can be efficiently performed classically using a Pauli pat…

Category: Paper