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Thermalization in quantum many-body systems can unfold across space in surprising ways. The authors reveal nonequilibrium regimes in a driven-dissipative quantum chain, including a spatially emergent prethermal domain and a nonthermal condensate destabilized by quantum fluctuations, with broad implications for driven quantum platforms
Since superconductivity has been observed in bilayer La3Ni2O7 and trilayer La4Ni3O10 under high pressure, there have been efforts to expand the high-Tc nickelate family by synthesising new materials. In this study, the authors stabilised a Sr alternative and co-substituted in YySr3-yNi2-xAlxO7-δ. They found that different dopants significantly affect the physical properties- substituting Sr at Y site greatly enhances conductivity, while substituting Al at the Ni site reduces it.
Kagome materials have become a popular platform to investigate a range of competing quantum phases, such as the interplay between superconductivity and charge density waves (CDW). Here, the authors use x-ray diffraction, scanning tunneling microscopy and resonant elastic x-ray scattering to investigate the evolution of CDW ordering as a function of temperature in canted antiferromagnetic kagome FeGe. They find for post-annealed samples that the long-range CDW orders persist even as the structural modulations are suppressed although observations are highly dependent on the sample growth condition.
Continuous-variable quantum key distribution (CV-QKD) enables secure communication using standard telecom hardware, but losses in fibres and free space severely limit its reach. Here, the authors present an adaptive software filtering protocol which triples key rates and achieves up to a 400-fold boost in satellite scenarios.
This study proposes a dual-modulation method for optical lattice clocks that synchronously modulates the lattice laser and probing laser to control atomic motion and light-atom interactions independently. The authors theoretically derive and experimentally verify the laws of micromotion shift, achieving its effective suppression via modulation, providing a key experimental basis for the precision optimization of such Floquet engineering optical lattice clocks.
Controlling how nearby resonators exchange energy is crucial for reducing interference in compact communication and sensing devices. The authors demonstrate a method that cancels different coupling paths, achieving “exceptional coupling” and flat bands, which suppress crosstalk and enable robust signal control in integrated systems.
Self-compressible multipass cavities for near-infrared few-cycle pulse generation rely on fixed-dispersion mirrors, which limits scalability and tunability. The authors propose to embed a bulk nonlinear plate providing weak anomalous dispersion within a tunable gas-filled cavity contributing normal dispersion, enabling dynamic and fine control of the net dispersion toward the anomalous regime and efficient broadband generation via nonlinear spatio-temporal effects.
Markovianity, where system-bath interactions have no memory, is central for describing many physical processes and serves as a useful approximation that reduces complexity. Here, the authors show that Markovianity can arise not only from the bath’s properties, but also from dissipation induced in a system coupled to a non-Markovian bath by its coupling to an additional Markovian bath.
Levitation of macroscopic objects in a vacuum is crucial for developing innovative inertial and pressure sensors, as well as exploring the relation between quantum mechanics and gravity. Here, the authors demonstrate a conducting rotor diamagnetically levitated in an axially symmetric magnetic field in high vacuum, with minimal rotational damping.
Embedding complex networks in hyperbolic spaces facilitates navigation and link prediction, though recent techniques face diminishing improvements. The authors present CLOVE, a scalable method that hierarchically organizes communities down to the node level by solving instances of the Travelling Salesman Problems, delivering high-quality embeddings and high efficiency for networks up to millions of nodes.
Efficient creation of ultracold polar molecules is crucial for applications in quantum simulation, computation, and precision measurement. Here, the authors demonstrate the improvement of STIRAP efficiency for the ground state transfer of 6Li40K molecules to over 90% by suppressing the fast laser amplitude/phase noise and operating at a single-photon detuning comparable to the intermediate state scattering rate.
Understanding the mechanism of ferromagnetism in strongly correlated systems is an ongoing theoretical challenge and the Hubbard model is typically adopted to investigate such systems. Here, the authors numerically investigate the doped triangular Fermi-Hubbard model and show ferromagnetism at intermediate coupling and finite doping, which results from the interplay of kinetic doublon-singlon exchange and lattice geometry.
The authors present sample-based quantum diagonalization (SQD) simulations of non-covalent interactions that match the accuracy of state-of-the-art classical methods. These results mark a key step towards quantum advantage, though further advances are needed to fully realize this potential.
Carbon nanotubes are one-dimensional materials with remarkable electronic and mechanical properties. The authors show that chiral versions of these nanotubes can generate a chirality-dependent current-induced orbital magnetization (Edelstein effect) which is tunable by gating or doping, making them promising for future spin-orbitronic technologies.
Turbulence in magnetized high-temperature plasmas, crucial for both natural and laboratory settings, involves complex cross-scale interactions. Here, the authors experimentally uncover nonlinear interactions between micro- and hyper-fine scale fluctuations, revealing a bifurcation that suppresses micro-scale turbulence while amplifying hyper-fine scale turbulence, with significant implications for understanding plasma dynamics.
Modeling the rapid evolution of plasma in a tokamak, a device for controlled nuclear fusion, is complex due to its high-dimensional dynamics. The authors develop a highly accurate simulator with robust extrapolation capabilities, enabling rapid training of a reinforcement learning actor. This approach facilitates stable 400-ms operation on the HL-3 tokamak.
Elastic bound states in the continuum (BICs) with multipolarization hybridization, distinct from optical and acoustic cases, remain an open area of investigation. This study demonstrates the coexistence of Friedrich–Wintgen and accidental BICs in a multi-polarization elastic system and achieves perfect mode conversion via these BICs.
While non-Hermitian physics and fractal geometry have been widely studied, their interplay in band braiding remains largely unexplored. The authors establish topological fractal braiding in non-Hermitian systems with scale-invariant skin effects, experimentally demonstrated using reconfigurable circuits.
ZrTe5 has received significant attention for it’s non-trivial topological band structure and reports of a large anomalous Hall effect despite being a nonmagnetic material. Here, using the Kubo-Streda formula the authors investigate the origins of the unconventional Hall response of ZrTe5 in low and high magnetic fields.
Energy harvesting seeks to recycle waste heat and use it to generate power for electronic devices. Here, the authors report an energy harvesting device whereby a non-thermal Tomonaga-Luttinger liquid channels heat from an active device to a heat engine. They find that the quantum-dot heat engine in the non-thermal regime surpasses the Carnot efficiency.
