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Tensor networks are mathematical structures that efficiently compress the data required to describe quantum systems. An algorithm for the optimal simulation of quantum dynamics based on tensor networks has now been implemented on a trapped-ion processor.
Attosecond charge migration in a neutral molecule has been observed to decohere within approximately 10 fs. However, this does not mean that the electronic coherence is irreversibly lost, as the charge migration is observed to revive after 40–50 fs. These findings have the potential to enable laser control of photochemical processes.
Experiments with chiral magnets may hold the key to a better understanding of fundamental aspects of transformations between different skyrmionic states, necessary for magnetic memory and logic applications to become a reality.
Stacking monolayer WS2 on top of bilayer WSe2 creates conditions where electrons and holes can coexist in the structure. Their Coulomb interaction allows them to form bound pairs and hence an excitonic insulator state.
Long-lived entanglement is a key resource for quantum metrology with optical clocks. Rydberg-based entangling gates within arrays of neutral atoms enable the generation of clock-transition Bell states with high fidelity and long coherence times.
Cilia are composed of cytoskeletal filaments and molecular motors and are characterized by a wave-like motion. Here the authors show that this motion is reconstituted in vitro from the self-assembly of polymerizing actin filaments and myosin motors.
When independent layers of electrons and holes are in close proximity to each other, their Coulomb interaction allows them to pair into neutral bosons and form an insulating state. This phenomenon is reported in a heterostructure of 2D materials.
The simulation of quantum dynamics is a challenging task to solve with classical resources. An experiment with a trapped-ion quantum processor now shows the efficient simulation of the evolution of large-scale many-body quantum systems.
X-ray ultrafast transient absorption spectroscopy captures the charge migration in neutral silane molecules, which shows in the spectra as pairs of quantum beats.
A self-assembled DNA structure is coupled to a nanopore and exhibits continuous rotation in the presence of nanoscale flows driven by electric fields or ionic gradients.
Trapped ion quantum computers can use two different kinds of ion to avoid crosstalk between adjacent qubits. Encoding two different qubit types in only one ion species can achieve the same goal while reducing experimental complexity.
Measurements of four different infinite-layer nickelates show that magnetic behaviour coexists with superconductivity. This is different from what is seen in cuprates, giving a strong distinction between the two classes of oxide superconductors.
Quantum computing with trapped ions requires qubits that can store and manipulate quantum information, and others that can be used for destructive incoherent operations. Different states of ytterbium-171 ions can be used to realize both qubit types
