Liquid crystals doped with live bacteria spontaneously generate a branched arrangement of channels, which could be used to transport particles at microscale. | Continue reading
By converting electron spin into ion motion, researchers build a simple heat engine out of a single calcium ion. | Continue reading
Researchers witness quantum interference and entanglement between photons from sources 150 million km apart---the Sun and a quantum dot in their lab. | Continue reading
The first experiment to teleport qutrits rather than qubits paves the way to teleporting the complete quantum state of a particle. | Continue reading
Following up on our earlier work predicting fractionally charged supermassive gravitinos, we explain their potential relevance as novel candidates for dark matter and discuss possible signatures and ways to detect them. | Continue reading
The first experiment to teleport qutrits rather than qubits paves the way to teleporting the complete quantum state of a particle. | Continue reading
Identification of \ensuremath{\alpha}-cluster states analogous to the $^{12}\mathrm{C}$ Hoyle state in heavier \ensuremath{\alpha}-conjugate nuclei can provide tests of the existence of \ensuremath{\alpha} condensates in nuclei. Such states are predicted for $^{16}\mathrm{O}$, $^ … | Continue reading
The AdS/CFT correspondence is used to show that response functions of quantum field theories can be used to ``image'' the black holes of the field theory's gravitational duals. | Continue reading
Using tools from quantum information and atomic physics, new experiments show that two quantum systems at the same fixed temperature can give rise to a virtual quantum system at half that temperature. | Continue reading
Researchers have designed structures that can hide objects from fluid flows and surface waves, so that no wake is visible. | Continue reading
Researchers have designed structures that can hide objects from fluid flows and surface waves so that no wake is visible. | Continue reading
Light hitting a metal surface at an angle can push the electrons forward in air or backward in vacuum, a result that leaves theorists puzzled. | Continue reading
A new way to measure the ``distance'' between high-energy particle collision events can help researchers interpret events involving, for example, the production of Higgs bosons or of top quarks. | Continue reading
The precise control of ultrasound focused into the central nervous system (CNS) is limited mainly by strong phase aberrations due to refraction and attenuation by the skull. This study proposes the use of acoustic holograms to correct these phase aberrations, and also to conform … | Continue reading
A model postulates that dark matter may have been generated during inflation, sourced by fluctuations of a massive scalar field minimally coupled only to gravity. | Continue reading
We report on the novel valley acoustoelectric effect, which can arise in a 2D material, like a transition metal dichalcogenide monolayer, residing on a piezoelectric substrate. The essence of this effect lies in the emergence of a drag electric current (and a spin current) due to … | Continue reading
Monolayer ${\mathrm{WSe}}_{2}$ is an intriguing material to explore dark exciton physics. We have measured the photoluminescence from dark excitons and trions in ultraclean monolayer ${\mathrm{WSe}}_{2}$ devices encapsulated by boron nitride. The dark trions can be tuned continuo … | Continue reading
Simulating a quantum system that exchanges energy with the outside world is notoriously hard, but the necessary computations might be easier with the help of neural networks. | Continue reading
We address the effective tight-binding Hamiltonian that describes the insulating Mott state of twisted graphene bilayers at a magic angle. In that configuration, twisted bilayers form a honeycomb superlattice of localized states, characterized by the appearance of flat bands with … | Continue reading
Experiments demonstrate a quantum parametric oscillator, a device with great potential in quantum error correction. Its minimal hardware design makes it a suitable building block for scalable quantum computing. | Continue reading
We study the empirical realization of the memory effect in Yang-Mills theory, especially in view of the classical vs quantum nature of the theory. Gauge invariant analysis of memory in classical $\mathrm{U}(1)$ electrodynamics and its observation by total change of transverse mom … | Continue reading
In the ultrastrong coupling regime, light and matter can no longer be distinguished: their coupling strengths are as large as their own energy scales. Even for simple two-level systems, this represents a new regime to explore within the quantum Rabi model. There has been consider … | Continue reading
The recent emergence of atomically thin two-dimensional (2D) materials has opened up possibilities for the design of ultrathin and flexible nanoelectronic devices. As truly 2D materials, they exhibit an optimal surface-to-volume ratio, which results in an extremely high sensitivi … | Continue reading
A scheme for implementing optical neural networks offers the energy benefits of optical components while being scalable to large systems, promising low-energy processing with order-of-magnitude improvements in network performance. | Continue reading
New Large Hadron Collider data reveal that exotic quark quintets, discovered in 2016, are composites of quark-antiquark mesons and three-quark baryons. | Continue reading
Researchers observe a critical point---a feature indicative of a continuous phase transition---in the brain's electrical activity as it switches from an asleep-like to an awake-like state. | Continue reading
A novel regime of laser-matter interaction that combines ultrashort mid-infrared laser pulses and silicon nanowires represents a promising way for producing extreme states of matter in the laboratory. | Continue reading
The authors theoretically investigate a cyclic superconducting quantum refrigerator for on-chip cooling. This work predicts substantial cooling of the cold reservoir (Cu) through repeated cycles of adiabatic magnetization and demagnetization of the working substance (Ta), with th … | Continue reading
We present experimental data and a complete theoretical description of the magneto-optical contributions to the complex refractive index in the extreme ultraviolet (XUV) range covering the $3p$ resonances of Fe, Co, and Ni. The direct comparison of the two allows us to conclude t … | Continue reading
The first laser spectroscopic determination of the change in the nuclear charge radius for a five-electron system is reported. This is achieved by combining high-accuracy ab initio mass-shift calculations and a high-accuracy measurement of the isotope shift in the $2{s}^{2}2p\tex … | Continue reading
A Berry curvature is an imaginary component of the quantum geometric tensor (QGT) and is well studied in many branches of modern physics; however, the quantum metric as a real component of the QGT is less explored. Here, by using tunable superconducting circuits, we experimentall … | Continue reading
An investigation shows how single shock waves, produced in water jets by x-ray laser pulses, propagate and become ultrasonic shock trains through oblique shock reflections and cavitation. These trains are one of the loudest sounds ever made in liquid water and may damage samples … | Continue reading
Excitation of a bound state in the continuum (BIC) through scattering is problematic since it is by definition uncoupled. Here, we consider a type of dressed BIC and show that it can be excited in a nonlinear system through multiphoton scattering and delayed quantum feedback. The … | Continue reading
A new high-resolution imaging technique reveals the behavior of individual atoms in an optical lattice with a resolution fifty times better than the conventional diffraction limit. | Continue reading
High-fidelity photon states are distilled from a weak coherent state through a photonic parity measurement using cavity QED. | Continue reading
The quantum vacuum of QED may facilitate Cherenkov radiation under the influence of strong electromagnetic fields. | Continue reading
We investigate the consequences of Lorentz violation (as expressed within the gravity sector of the Standard-Model Extension) for gravitational quantum states of ultracold neutrons (UCNs). Since our main aim is to compare our theoretical results with the recent high-sensitivity G … | Continue reading
The propagation front of a crack generates large strain gradients and it is therefore a strong source of gradient-induced polarization (flexoelectricity). Herein, we demonstrate that, in piezoelectric materials, a consequence of flexoelectricity is that crack propagation is helpe … | Continue reading
Physicists observe entropy production in two intermediate-scale quantum systems, indicating that the systems have undergone an irreversible process. | Continue reading
Among advanced paradigms in the physics of computing, adiabatic quantum-flux-parametron (AQFP) logic is interesting, in that it can easily introduce stochastic processes by exploiting naturally occurring thermal fluctuations. This study proposes using AQFP logic to implement stoc … | Continue reading
In quantum computing, symmetry plays a central role in protecting qubits from errors. This work develops an efficient approach to creating decoherence-free subspaces for logical qubits, by optimally transferring the states of physical qubits via concatenated dynamical decoupling. … | Continue reading
Exploiting the relative entropy of coherence, we isolate the coherent contribution in the energetics of a driven nonequilibrium quantum system. We prove that a division of the irreversible work can be made into a coherent and incoherent part. This provides an operational criterio … | Continue reading
An optical analogue of stimulated Hawking radiation is observed in nonlinear fiber optics used as a laboratory analogue of black holes. | Continue reading
A new cosmology model suggests that our Universe has a mirror image in the form of an ``anti-Universe'' that existed before the big bang. | Continue reading
In this paper two things are done. (1) It is shown that a considerable simplification can be attained in writing down matrix elements for complex processes in electrodynamics. Further, a physical point of view is available which permits them to be written down directly for any sp … | Continue reading
While it is well established that elevated temperatures can induce surface roughening of metal surfaces, the effect of a high electric field on the atomic structure at ambient temperature has not been investigated in detail. Here we show with atomic resolution using in situ trans … | Continue reading