Quantum

Paper

Quantum Enhanced Sensitivity through Many-Body Bloch Oscillations

Hassan Manshouri, Moslem Zarei, Mehdi Abdi, Sougato Bose, and Abolfazl Bayat,

Quantum 9, 1793 (2025).

We investigate the sensing capacity of non-equilibrium dynamics in quantum systems exhibiting Bloch oscillations. By focusing on the resource efficiency of the probe, quantified by quantum F…

Paper

Learning Feedback Mechanisms for Measurement-Based Variational Quantum State Preparation

Daniel Alcalde Puente and Matteo Rizzi,

Quantum 9, 1792 (2025).

This work introduces a self-learning protocol that incorporates measurement and feedback into variational quantum circuits for efficient quantum state preparation. By combining projective me…

Paper

Quantum PCPs: on Adaptivity, Multiple Provers and Reductions to Local Hamiltonians

Harry Buhrman, Jonas Helsen, and Jordi Weggemans,

Quantum 9, 1791 (2025).

We define a general formulation of quantum PCPs, which captures adaptivity and multiple unentangled provers, and give a detailed construction of the quantum reduction to a local Hamiltonian…

Paper

Unstructured Adiabatic Quantum Optimization: Optimality with Limitations

Arthur Braida, Shantanav Chakraborty, Alapan Chaudhuri, Joseph Cunningham, Rutvij Menavlikar, Leonardo Novo, and Jérémie Roland,

Quantum 9, 1790 (2025).

In the circuit model of quantum computing, amplitude amplification techniques can be used to find solutions to NP-hard problems defined on $n$-bits in time $\text{poly}(n) 2^{n/2}$. In this work…

Paper

Deep Circuit Compression for Quantum Dynamics via Tensor Networks

Joe Gibbs and Lukasz Cincio,

Quantum 9, 1789 (2025).

Dynamic quantum simulation is a leading application for achieving quantum advantage. However, high circuit depths remain a limiting factor on near-term quantum hardware. We present a compila…

Paper

Classical Simulation of High Temperature Quantum Ising Models

Elizabeth Crosson and Samuel Slezak,

Quantum 9, 1788 (2025).

We consider generalized quantum Ising models, including those which could describe disordered materials or quantum annealers, and we prove that for all temperatures above a system-size indep…

Paper

Gauge freedoms in unravelled quantum dynamics: When do different continuous measurements yield identical quantum trajectories?

Calum A. Brown, Katarzyna Macieszczak, and Robert L. Jack,

Quantum 9, 1787 (2025).

Quantum trajectories of a Markovian open quantum system arise from the back-action of measurements performed in the environment with which the system interacts. In this work, we consider cou…

Paper

Quantum state preparation via piecewise QSVT

Oliver O’Brien and Christoph Sünderhauf,

Quantum 9, 1786 (2025).

Efficient state preparation is essential for implementing efficient quantum algorithms. Whilst several techniques for low-cost state preparation exist, this work facilitates further classes…

Paper

Indefinite Time Directed Quantum Metrology

Gaurang Agrawal, Pritam Halder, and Aditi SenDe,

Quantum 9, 1785 (2025).

We explore the performance of the metrology scheme by employing a quantum time flip during encoding, a specific case of processes with indefinite time direction, which we refer to as indefin…

Paper

Sampling Groups of Pauli Operators to Enhance Direct Fidelity Estimation

Júlia Barberà-Rodríguez, Mariana Navarro, and Leonardo Zambrano,

Quantum 9, 1784 (2025).

Direct fidelity estimation is a protocol that estimates the fidelity between an experimental quantum state and a target pure state. By measuring the expectation values of Pauli operators sel…

Paper

Subsystem Information Capacity in Random Circuits and Hamiltonian Dynamics

Yu-Qin Chen, Shuo Liu, and Shi-Xin Zhang,

Quantum 9, 1783 (2025).

In this study, we explore the information capacity of open quantum systems, focusing on the effective channels formed by the subsystem of random quantum circuits and quantum Hamiltonian evol…

Paper

Stabilizer ground states for simulating quantum many-body physics: theory, algorithms, and applications

Jiace Sun, Lixue Cheng, and Shi-Xin Zhang,

Quantum 9, 1782 (2025).

Stabilizer states, which are also known as the Clifford states, have been commonly utilized in quantum information, quantum error correction, and quantum circuit simulation due to their simp…

Paper

Breakdown of Measurement-Induced Phase Transitions Under Information Loss

Alessio Paviglianiti, Giovanni Di Fresco, Alessandro Silva, Bernardo Spagnolo, Davide Valenti, and Angelo Carollo,

Quantum 9, 1781 (2025).

The dynamics of a quantum-many body system subject to measurements is naturally described by an ensemble of quantum trajectories, which can feature measurement-induced phase transitions (MIP…

Paper

On the composable security of weak coin flipping

Jiawei Wu, Yanglin Hu, Akshay Bansal, and Marco Tomamichel,

Quantum 9, 1780 (2025).

Weak coin flipping is a cryptographic primitive in which two mutually distrustful parties generate a shared random bit to agree on a winner via remote communication. While a stand-alone secu…

Paper

Logical Noise Bias in Magic State Injection

Nicholas Fazio, Robin Harper, and Stephen D. Bartlett,

Quantum 9, 1779 (2025).

Fault-tolerant architectures aim to reduce the noise of a quantum computation. Despite such architectures being well studied a detailed understanding of how noise is transformed in a fault-t…

Paper

Characterizing maximally many-body entangled fermionic states by using $M$-body density matrix

Irakli Giorgadze, Haixuan Huang, Jordan Gaines, Elio J. König, and Jukka I. Väyrynen,

Quantum 9, 1778 (2025).

Fermionic Hamiltonians play a critical role in quantum chemistry, one of the most promising use cases for near-term quantum computers. However, since encoding nonlocal fermionic statistics u…

Category: Paper