Group-theoretic error mitigation enabled by classical shadows and symmetries

Andrew Zhao and Akimasa Miyake have published a paper to the arXiv preprint server which introduces a technique for reducing the impact of errors in noisy, near-term quantum computers. Quantum compute…

Tolerance to aberration and misalignment in a two-point-resolving image inversion interferometer

Image inversion interferometry can measure the separation of two incoherent point sources at or near the quantum limit. This technique has the potential to improve upon current state-of-the-art imagin…

Adaptive scheme based on photon counting produces the best precision on estimating the phase of coherent states

Becerra Group shows that adaptive non-Gaussian measurements provide the highest sensitivity for single-shot phase estimation of coherent states

General quantum measurements optimally interpolate between measurement paradigms

Quantum state discrimination is a central problem in quantum measurement theory, with applications spanning from quantum communication to computation ...

Quantum advantage attested by nonlocal games

Akimasa Miyake’s group, in collaboration with an experimental group at the University of Maryland, formulated and implemented games on a trapped-ion quantum computer that can be used to demonstrate an…

3-regular three-XORSAT planted solutions benchmark of classical and quantum heuristic optimizers

Tameem Albash and a group of USC researchers have published a paper in Quantum Science Technology comparing dedicated optimization hardware

Effect of chaos on the simulation of quantum critical phenomena in analog quantum simulators

Karthik Chinni, Pablo Poggi and Ivan Deutsch has published a paper on the effect of chaos on the simulation of quantum critical phenomena in analog quantum simulators.

Efficient tomography for quantum simulations of fermions

Andrew Zhao and Akimasa Miyake, in collaboration with Nicholas Rubin from Google Research, have published a paper in Physical Review Letters detailing a class of protocols to efficiently extract impor…

Quantum and Classical Nonlinear Dynamics of p-spin Kicked Tops

Figures (a), (b) and (c) show phase portraits for the first three kicked p-spins, with p = 2, 3, 4. Top and bottom rows show the phase portraits for two different values of the kicking strength, givin…

Quantum computational advantage with symmetric quantum matter

Austin Daniel and Akimasa Miyake have recently published a paper, Quantum Computational Advantage with String Order Parameters of One-Dimensional Symmetry-Protected Topological Order in Physical Revie…

Predicting robust and sensitive outputs in real-world noisy quantum simulators

(a) Schematic of a dynamical quantum simulator subject to errors. (b) Diagram of the experimental device. (c) Energy level diagram corresponding to the hyperfine ground manifold of cesium, indicating …

Channel-noise tracking for sub-shot-noise-limited receivers with neural networks

Non-Gaussian receivers for optical communication with coherent states can achieve measurement sensitivities beyond the limits of conventional detection, given by the quantum-noise limit (QNL).

Optical phase estimation approaching the quantum limit in a single shot

Optical phase estimation is at the center of many metrological tasks where the value of a physical parameter of a system is mapped to the phase of an electromagnetic field, and single-shot measurement…

Using measurement and feedback control to simulate complex mean field spin dynamics in quantum systems

In physical systems composed of many parts, like ultracold atomic ensembles, electrons in a superconductor, or arrays of superconducting circuits, complex dynamics emerges when the different parts of …

Phase tracking for sub-shot-noise-limited receivers

Nonconventional receivers for phase-coherent states based on non-Gaussian measurements such as photon counting surpass the sensitivity limits of shot-noise-limited coherent receivers, the quantum nois…