PRX Quantum

A fundamental quantum uncertainty relation reveals an unavoidable trade-off between the reliabilities of the charging power and the work deposited during the charging and discharging of quantum batteries, establishing essential design limits for future quantum energy storage.

Using only existing error syndrome data and no additional calibration circuits, it is possible to efficiently benchmark quantum hardware and verify encoded computations.

A new study demonstrates the optical charging of spins in a quantum dot molecule, while keeping the tunability of its parameter, which can become an important building block for multidimensional photonic cluster state generation.

Three-dimensional simulations of electron shuttling in realistic SiMOS devices are presented, identifying operating regimes resilient to common device imperfections and charge defects.

Verification of encoded quantum systems is made possible with a scalable tool that assesses computational accuracy under general device noise.

A conic optimization method addressing a critical challenge in key rate estimation for quantum key distribution is presented, providing tighter security bounds and fast numerical convergence.

A circuit-based framework characterizing thermal quantum phases via a correlation-decay condition is presented, establishing self-correction as a universal property of finite-temperature quantum memories.

A general framework for the study of statistical moments of quantum channel ensembles is introduced, providing new insights into noisy quantum circuits and variational quantum algorithms.

An unsupervised, data-driven framework based on the intrinsic dimension of quantum trajectories provides a robust probe for detecting integrability and ergodicity breaking in open quantum systems beyond the transient regime, while new results on autonomous chaos are discussed.

For quantum circuits that generate complex dynamics, a single, one-site operation is sufficient to produce randomness, showcasing a trade-off between dynamical chaos and randomness.

A new heuristic approach accelerates the convergence of classical simulation of two-dimensional quantum dynamics, enabling the verification of quantum simulation experiments in previously inaccessible regimes.

Exponentially accurate simulation of open quantum systems is made viable for early fault-tolerant devices via a random compilation method requiring a minimal number of ancilla qubits.

The unavoidable “gauge” ambiguity in learning a quantum computer’s noise does not hinder error mitigation, and this remaining degree of freedom can even be optimized to make mitigation dramatically more efficient.

A dual-species atomic array reduces technical overhead (no local addressing needed and nondestructive midcircuit measurements) and enables efficient entanglement purification for applications in quantum networking and distributed computation.

Experiments in Ge/SiGe quantum point contacts demonstrate a gate-tunable proximity-induced superconducting gap and near-ideal superconducting conductance quantization in excellent agreement with theory.

Researchers experimentally demonstrate a new method for large-bandwidth dispersive readout, with built-in resonator reset, providing potential applications in quantum error correction.

Mapping open quantum systems to higher-dimensional topological order provides a new framework for characterizing strong-to-weak symmetry breaking and nonequilibrium quantum phases.

A versatile framework bridges layout-level microwave simulations with quantum dynamics, enabling realistic modeling of driven superconducting circuits beyond simplified lumped-element descriptions.

A comprehensive account of the Pauli propagation method for simulating quantum systems, from theory framework to software implementation and applications.

A proposed five-stage framework outlines the path to useful quantum computing, detailing the scientific milestones required to bridge the gap between theory and real-world utility.