Search

The Majorana Demonstrator experiment reports searches for the violation of the Pauli exclusion principle and of charge conservation. In the absence of a signal, exclusion limits for these processes are reported.

Quantum simulations of the phase diagram of quantum chromodynamics faces hard challenges, such as having to prepare mixed states and enforcing the non-Abelian gauge symmetry constraints. Here, the authors show how to solve the two above problems in a trapped-ion device using motional ancillae and charge-singlet measurements.

Central charge, a key quantity in conformal field theories, is crucial in the study of critical phenomena, yet its measurement has remained elusive. Here, the authors extract the central charge of several quantum critical models by accurately preparing their ground states on a superconducting quantum processor.

Coherent noise affecting a random error correcting code is now shown to produce a transition between phases that accumulate and destroy magic.

Generation of entanglement in quantum computers stems from the native interactions between qubits, which are usually restricted to the pairwise limit. A method to control three- and four-body interactions has now been demonstrated with trapped ions.

Probing quantum many-body systems while undergoing thermalisation is challenging, especially when looking for signatures of ergodicity and quantum chaos. Here, the authors study a lattice gauge theory in 2+1 dimensions using a trapped-ion-based universal digital quantum computer, unveiling the role of entanglement in the thermalization dynamics.

An efficient method for parallelizing the contraction of tensor networks pushes the boundaries for the classical simulation of quantum computation, and aids the development of quantum algorithms and hardware.

Geometric phase interference has been predicted to appear around conical intersections but has been experimentally illusive owing to competing effects in molecular systems. Now, this effect has been demonstrated in chains of trapped ions using state-of-the-art quantum simulation and read-out techniques.

Efficient protocols for comparing quantum states generated on different quantum computing platforms are becoming increasingly important. Zhu et al. demonstrate cross-platform verification using randomized measurements that allow for scaling to larger systems as compared to full quantum state tomography.

Fault-tolerant circuits for the control of a logical qubit encoded in 13 trapped ion qubits through a Bacon–Shor quantum error correction code are demonstrated.

Inversion asymmetry imparts rich condensed matter phenomena in inorganic systems, and transmission of chirality across structural motifs is an attractive design strategy to break symmetry. Here, the authors use chiral organic cations to transfer structural chirality to inorganic layers in hybrid perovskites.

In this study the authors consider the structural variants (SVs) present within cancer cases of the ICGC/TCGA Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium. They report hundreds of genes, including known cancer-associated genes for which the nearby presence of a SV breakpoint is associated with altered expression.

You can start and maintain your own group to help scientists of all backgrounds thrive.

Two-dimensional hybrid perovskites exhibiting Rashba/Dresselhaus spin-splitting can be potentially used for spin-selective transport and spin-orbitronics, yet the structural determinants of spin-splitting are not well-understood. Here, the authors reveal a specific inorganic layer distortion that correlates with bulk spin-splitting in these materials.

Analysis of cancer genome sequencing data has enabled the discovery of driver mutations. Here, as part of the ICGC/TCGA Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium the authors present DriverPower, a software package that identifies coding and non-coding driver mutations within cancer whole genomes via consideration of mutational burden and functional impact evidence.

Understanding deregulation of biological pathways in cancer can provide insight into disease etiology and potential therapies. Here, as part of the PanCancer Analysis of Whole Genomes (PCAWG) consortium, the authors present pathway and network analysis of 2583 whole cancer genomes from 27 tumour types.

Multi-omics datasets pose major challenges to data interpretation and hypothesis generation owing to their high-dimensional molecular profiles. Here, the authors develop ActivePathways method, which uses data fusion techniques for integrative pathway analysis of multi-omics data and candidate gene discovery.

The authors present a valley-Hall topological acoustofluidic chip revealing the complex interactions between elastic valley spin and nonlinear fluid dynamics, revealing its potential towards on-chip biological applications.

A one-dimensional trapped-ion quantum simulator with up to 23 spins is used to demonstrate a continuous symmetry-breaking phase that relies on long-range interactions.

Analog-quantum simulations derived from tracking the evolution of trapped-ion systems hold the potential to simulate molecular quantum dynamics that are beyond the reach of classical-digital strategies. This Review explores the prospects for developing this quantum advantage.

Using a trapped-ion quantum simulator of up to 50 spins, researchers explore new universal scaling laws in non-equilibrium dynamics, revealing unique critical behaviors following a sequence of quenches in a long-range 1D Ising model.

The valley degree of freedom gives additional flexibility to tunable phononic and photonic crystals. Here, the authors realise a honeycomb phononic structure where both the size of the cavities and of the air channel can be actively tuned, allowing several functionalities in a broad frequency range.

In this paper, the authors show high-fidelity entanglement of 97% between remote trapped ion memories, mediated by time-bin photons. The time-bin nature of photons removes polarization errors and allows extension to higher dimensional qubit memories.

Long-range interactions have been predicted to enable a phase transition in one-dimensional systems. An experiment now validates this hypothesis in a trapped-ion quantum simulator by observing a finite-energy phase transition in one dimension.

Beautiful experiments in an ultracold, strongly interacting atomic Fermi gas reveal that, unexpectedly, unpaired atomic spins flow in the system with the maximum resistance permitted by the laws of quantum mechanics. See Letter p.201

The authors summarize the data produced by phase III of the Encyclopedia of DNA Elements (ENCODE) project, a resource for better understanding of the human and mouse genomes.

Many-body open quantum systems are predicted to undergo a phase transition towards a pure state through frequent projective measurements. The phases separated by this transition have now been observed with random circuits on a trapped-ion computer.

Entanglement was observed in top–antitop quark events by the ATLAS experiment produced at the Large Hadron Collider at CERN using a proton–proton collision dataset with a centre-of-mass energy of √s  = 13 TeV and an integrated luminosity of 140 fb⁻¹.

This overview of the ENCODE project outlines the data accumulated so far, revealing that 80% of the human genome now has at least one biochemical function assigned to it; the newly identified functional elements should aid the interpretation of results of genome-wide association studies, as many correspond to sites of association with human disease.

Thanks to its topological properties, a CMOS-compatible photonic crystal shows reflectionless transmission of light at telecommunication wavelengths even along a path with sharp turns.

In systems with no symmetry, local operations can combine to make any unitary transformation across a whole quantum system, but if symmetries limit the allowed operations, they cannot all be generated using local transformations.

The creation of energetic electrons through plasmon excitation has implications in optical energy conversion and ultrafast nanophotonics. Here, the authors find evidence for three subpopulations of nonthermal carriers which arise from anisotropic electron-electron scattering near the Fermi surface.

A high-throughput optical imaging and spectroscopy technique has now been developed that characterizes the chirality and electronic structure of individual single-walled carbon nanotubes either on their growth substrate or in functional devices.

High-energy electron scattering that can isolate pairs of nucleons in high-momentum configurations reveals a transition to spin-independent scalar forces at small separation distances, supporting the use of point-like nucleon models to describe dense nuclear systems.

The internal structure of the neutron has now been probed by highly energetic photons scattering off it. Combined with previous results for protons, these measurements reveal the contributions of quark flavours to the nucleon structure.

Trapped atomic Fermi gases currently provide models of neutron stars, high-temperature superconductors, and even the quark–gluon plasma that comprised the early universe. The ability to produce these important systems on a chip could also open the way to their practical use.

Strongly interacting atomic Fermi gases — useful models for many other exotic forms of matter — enter a superfluid state at low temperatures. The first direct observation of that transition has been made.

A description is given of the ENCODE consortium’s efforts to examine the principles of human transcriptional regulatory networks; the results are integrated with other genomic information to form a hierarchical meta-network where different levels have distinct properties.

Quantum simulations of the fundamental particles and forces of nature have a central role in understanding key static and dynamic quantum properties of matter. Motivations, techniques and future challenges for simulations of quantum fields are discussed, highlighting examples of early progress towards the dynamics of high-density, non-equilibrium systems of quarks, gluons and neutrinos.