Quantum

Paper

Meson dynamics from locally exciting a particle-conserving $Z_2$ lattice gauge theory

Vaibhav Sharma and Kaden R. A. Hazzard,

Quantum 9, 1872 (2025).

Quantum simulation of lattice gauge theories is an important avenue to gain insights into both particle physics phenomena and constrained quantum many-body dynamics. There is a growing inter…

Paper

Symmetry resolved out-of-time-order correlators of Heisenberg spin chains using projected matrix product operators

Martina Gisti, David J. Luitz, and Maxime Debertolis,

Quantum 9, 1871 (2025).

We extend the concept of operator charge in the context of an abelian $U(1)$ symmetry and apply this framework to symmetry-preserving matrix product operators (MPOs), enabling the description…

Paper

Estimating the entanglement of random multipartite quantum states

Khurshed P. Fitter, Cécilia Lancien, and Ion Nechita,

Quantum 9, 1870 (2025).

Genuine multipartite entanglement of a given multipartite pure quantum state can be quantified through its geometric measure of entanglement, which, up to logarithms, is simply the maximum o…

Paper

On High-Dimensional Twin-Field Quantum Key Distribution

Ronny Mueller, Mujtaba Zahidy, Leif Katsuo Oxenløwe, Søren Forchhammer, and Davide Bacco,

Quantum 9, 1869 (2025).

Twin-Field Quantum Key Distribution (QKD) is a QKD protocol that uses single-photon interference to perform QKD over long distances. QKD protocols that encode information using high-dimensio…

Paper

Potential renormalisation, Lamb shift and mean-force Gibbs state – to shift or not to shift?

Luis A. Correa and Jonas Glatthard,

Quantum 9, 1868 (2025).

Often, the microscopic interaction mechanism of an open quantum system gives rise to a `counter term' which renormalises the system Hamiltonian. Such term compensates for the distortion of t…

Paper

Holevo Cramér-Rao bound: How close can we get without entangling measurements?

Aritra Das, Lorcán O. Conlon, Jun Suzuki, Simon K. Yung, Ping K. Lam, and Syed M. Assad,

Quantum 9, 1867 (2025).

In multi-parameter quantum metrology, the resource of entanglement can lead to an increase in efficiency of the estimation process. Entanglement can be used in the state preparation stage, o…

Paper

QuantumToolbox.jl: An efficient Julia framework for simulating open quantum systems

Alberto Mercurio, Yi-Te Huang, Li-Xun Cai, Yueh-Nan Chen, Vincenzo Savona, and Franco Nori,

Quantum 9, 1866 (2025).

We present $\tt{QuantumToolbox.jl}$, an open-source Julia package for simulating open quantum systems. Designed with a syntax familiar to users of $\tt{QuTiP}$ (Quantum Toolbox in Python), it ha…

Paper

Sequency Hierarchy Truncation (SeqHT) for Adiabatic State Preparation and Time Evolution in Quantum Simulations

Zhiyao Li, Dorota M. Grabowska, and Martin J. Savage,

Quantum 9, 1865 (2025).

We introduce the Sequency Hierarchy Truncation (SeqHT) scheme for reducing the resources required for state preparation and time evolution in quantum simulations, based upon a truncation in…

Paper

Adaptivity is not helpful for Pauli channel learning

Xuan Du Trinh and Nengkun Yu,

Quantum 9, 1864 (2025).

We prove that adaptive strategies offer no advantage over non-adaptive ones for learning and testing Pauli channels using entangled inputs. This key observation allows us to characterize the…

Paper

Quantifying spectral signatures of non-Markovianity beyond the Born-Redfield master equation

A. Keefe, N. Agarwal, and A. Kamal,

Quantum 9, 1863 (2025).

Memory or time-non-local effects in open quantum dynamics pose theoretical as well as practical challenges in the understanding and control of noisy quantum systems. While there has been a c…

Paper

Hybrid Quantum Cryptography from Communication Complexity

Francesco Mazzoncini, Balthazar Bauer, Peter Brown, and Romain Alléaume,

Quantum 9, 1862 (2025).

We introduce an explicit construction for a key distribution protocol in the Quantum Computational Timelock (QCT) security model, where one assumes that computationally secure encryption may…

Paper

Topological, multi-mode amplification induced by non-reciprocal, long-range dissipative couplings

Carlos Vega, Alberto Muñoz de las Heras, Diego Porras, and Alejandro González-Tudela,

Quantum 9, 1861 (2025).

Non-reciprocal couplings or drivings are known to induce steady-state, directional, amplification in driven-dissipative bosonic lattices. This amplification phenomenon has been recently link…

Paper

Lower T-count with faster algorithms

Vivien Vandaele,

Quantum 9, 1860 (2025).

Among the cost metrics characterizing a quantum circuit, the $T$-count stands out as one of the most crucial as its minimization is particularly important in various areas of quantum computati…

Paper

Loschmidt echo, emerging dual unitarity and scaling of generalized temporal entropies after quenches to the critical point

Stefano Carignano and Luca Tagliacozzo,

Quantum 9, 1859 (2025).

We show how the Loschmidt echo of a product state after a quench to a conformal invariant critical point and its leading finite time corrections can be predicted by using conformal field the…

Paper

From Magic State Distillation to Dynamical Systems

Yunzhe Zheng and Dong E. Liu,

Quantum 9, 1858 (2025).

Magic State Distillation (MSD) has been a research focus for fault-tolerant quantum computing due to the need for non-Clifford resource in gaining quantum advantage. Although many of the MSD…

Paper

Expanding Hardware-Efficiently Manipulable Hilbert Space via Hamiltonian Embedding

Jiaqi Leng, Joseph Li, Yuxiang Peng, and Xiaodi Wu,

Quantum 9, 1857 (2025).

Many promising quantum applications depend on the efficient quantum simulation of an exponentially large sparse Hamiltonian, a task known as sparse Hamiltonian simulation, which is fundament…

Category: Paper