A team of researchers observed magnetically mediated hole pairing in a synthetic crystal, confirming theories that magnetic fluctuations give rise to pairing. The experiments suggest significant mobility of bound hole pairs, which could be efficient carriers of currents.
Researchers at ETH Zurich introduce a novel single-cavity architecture for a dual-comb laser, enabling fast and precise scanning of optical delays. The system achieves high precision (2-fs) and stability (up to 500 Hz) for an optical delay of 12.5 ns, opening up new possibilities for practical applications.
A team led by Prof. Leonardo Degiorgi reveals the electronic environment of PrAlGe, which favors an unusually large anomalous Hall conductivity at low temperatures due to correlated Weyl states. They propose a suitable experimental approach to trace the relevant ingredients of the electronic structure.
Researchers demonstrate the creation of a self-oscillating pump in a topological dissipative atom-cavity system, transporting atoms without external periodic driving. This discovery combines quantum many-body physics and open quantum systems, offering insights into exotic states of matter.
Researchers demonstrate device-independent quantum key distribution using quantum entanglement, paving the way for secure communication. The breakthrough ensures security without relying on the eavesdropper's computational power.
Researchers at ETH Zurich successfully demonstrated a protocol for gentle, controlled measurement of mechanical quantum states in hybrid qubit-resonator devices. This breakthrough enables applications such as quantum error correction and more, paving the way for advanced technological innovations.
Researchers found that quantum error correction can distort the output of quantum sensors and lead to unphysical results due to non-commuting actions. However, they provide procedures for restoring correct results through post-processing and devising ideal sensing protocols.
A team of scientists has created a detailed prediction of an Earth-sized planet in the α Centauri A/B system. The model suggests the planet, dubbed 'α-Cen-Earth', would have a mantle dominated by silicates and be geochemically similar to our Earth.
Physicists at ETH Zurich demonstrate that vacuum fluctuations can cause a breakdown of topological protection in the integer quantum Hall effect. Exposing a quantum Hall system to strongly enhanced quantum vacuum fluctuations of a tight cavity provides a novel route to modify quantum states.
Researchers at ETH Zurich have successfully implemented a novel measurement scheme for finite-energy states, extending the coherence time of a trapped ion quantum oscillator by a factor of three. This breakthrough addresses a major challenge in quantum computing and brings us closer to enabling fault-tolerant quantum computers.
Researchers at ETH Zurich demonstrate the first direct femtosecond-pulse emission from a quantum cascade laser in the mid-infrared region, generating powerful pulses as short as 630 femtoseconds and 4.5 watt peak power. This breakthrough opens up practical routes to accessing ultrafast dynamics across the molecular fingerprint region.
The study introduces a versatile method to tune the interaction strength in 2D heterostructures by applying electrical fields. This allows for the exploration of wide parameter ranges and opens up new perspectives for quantum simulation.
Researchers have explored the limits of light-matter coupling at the nanoscale, discovering a fundamental physical limit to subwavelength confinement. The study reveals that as light is concentrated into smaller volumes, its interaction with matter changes in ways that cannot be predicted by classical theories.
Researchers demonstrate controlled reversal of thermoelectric current in a tiny cloud of atoms by tuning interaction strength. This breakthrough advances the fundamental understanding of interacting quantum systems and paves the way for designing efficient thermoelectric materials.
Researchers successfully demonstrated electroluminescence from a silicon-germanium device, marking a key step towards the development of a silicon-based laser. The achievement could have significant implications for the large-scale use of terahertz radiation in fields such as medical imaging and wireless communication.
A team led by Alexander Eichler has demonstrated the first scanning force microscope with a vibrating substrate, pushing sensitivity to its fundamental limit. The approach uses a perforated membrane as the 'table' and features an optical interferometer for sensitive measurement.
A novel mechanism for electron optics in two-dimensional solid-state systems has been introduced, allowing for the control of electrons at the scale of micrometers and nanometers. This breakthrough enables the engineering of quantum-optical phenomena in a variety of materials.
Quasiperiodic structures exhibit unique beauty and intriguing physics, but a lack of overarching framework hindered understanding. Researchers establish versatile tools for exploring quantum behavior in diverse quasiperiodic settings, demonstrating the strength of their approach to uncover new physical mechanisms.
Researchers at ETH Zurich have developed a high-repetition-rate laser source producing coherent soft x-rays spanning the entire 'water window', enabling new applications in chemistry and biology. The system, capable of 100 kHz repetition rates, demonstrates a significant improvement over existing sources.
A comprehensive study reveals that spin canting, a slight nudge on magnetic moments, provokes substantial changes in the electronic band structure of CaMnBi2. The research establishes a direct link between magnetism and electronic-band topology, opening doors to exploring new properties and possibilities.
Researchers in the Keller group at ETH Zurich have measured for the first time how single photons alter an unbound electron's dynamics. They found a delay of up to 12 attoseconds between s- and d-electrons, depending on their angular momentum. This subtle signature reflects underlying quantum-mechanical effects.
Researchers at ETH Zurich present theoretical and experimental work that provides a higher-level understanding of 'fragile topology' in topological insulators. The discovery could lead to new applications in acoustics, photonics, and beyond.
Researchers at ETH Zurich have made a breakthrough in understanding the interaction between light and matter, revealing how linear momentum is transferred to electrons during ionisation. The study found that the timing of electron 'birth' affects momentum transfer, with additional delays induced by interactions with residual ions.
Researchers at ETH Zurich have demonstrated a sub-picosecond thin-disk laser oscillator achieving an average output power of 350 W, surpassing the previous record. The breakthrough enables efficient cooling and heating control, paving the way for even more powerful lasers with potential kilowatt-level output.
The study demonstrates simultaneous control over transport and spin properties of cold atoms, enabling the exploration of spintronics and solid-state physics. The efficiency of the atomic spin filter matches that of equivalent electronic systems, opening up new perspectives for studying quantum transport dynamics.
Physicists at ETH Zurich create unifying platform to explore 'time crystals' in both classical and quantum regimes. They discover emergent dynamics at subharmonic frequencies in weakly-coupled modes, similar to those seen in quantum many-body systems.
Researchers have made substantial progress in engineering quantized gauge fields coupled to ultracold matter, a versatile platform for tackling complex problems in physics. By controlling the Peierls phase, neutral atoms can mimic charged particles moving in magnetic fields.
Researchers at ETH Zurich measured how electrons in transition metals redistribute within a fraction of an optical oscillation cycle. The study demonstrates the possibility of ultrafast control of material properties, which could inform the development of faster electronic components.
Researchers from ETH Zurich have discovered a way to boost polariton-polariton interaction, enabling strong coupling between matter and light. This breakthrough opens up new perspectives for photonics and many-body physics.
Researchers at ETH Zurich have demonstrated a terahertz quantum cascade laser that operates without cryogenic cooling, reaching temperatures of up to 210 K. This breakthrough removes the main obstacles to widespread use in various applications, including non-invasive imaging and quality control.
Physicists at ETH Zurich have created acoustic metamaterials that interact differently with Weyl fermions of opposite chirality, a crucial aspect of particle physics. This discovery enables the manipulation of chiral channels, giving independent access to these particles in bulk systems.
Researchers at ETH Zurich found that most angular momentum is transferred to the lattice during ultrafast demagnetization, twisting the sample as magnetization rapidly decreases. The discovery offers guidance for technological applications of ultrafast optical switching.
ETH Zurich researchers have demonstrated a novel quantum error correction technique that can monitor and correct errors in real-time. The technique, which uses trapped ions to encode quantum information, has been successfully tested with repeated measurements on the same system, exceeding previous experimental limits.
Researchers at ETH Zurich explore the coupling between heat and particle currents in a gas of strongly interacting fermionic atoms. They found an order of magnitude below predictions of the Wiedemann-Franz law, indicating separation of mechanisms responsible for particle and heat currents.
Scientists at ETH Zurich develop a controlled quantum system with two coupled order parameters, enabling the creation of diverse phase diagrams and exploring complex interactions. The platform provides a unique tool for studying technologically relevant materials and simulating their properties.
Researchers have developed a refined magnetic sense using algorithms and hardware from quantum computation, achieving six times higher sensitivity than classical methods. The transmon qubit-based magnetometer uses adaptive phase-estimation schemes to measure the strength of external magnetic fields.
A team of astronomers has identified at least six strong candidates for dark galaxies by leveraging the ultraviolet light from quasars to 'illuminate' gas in the intergalactic medium. The discovery could help fill a gap in our understanding of galaxy evolution, as it provides direct evidence for the existence of dark galaxies.
Researchers at ETH Zurich found that ionization delays in molecules can significantly depend on the kinetic energy of both the photoelectron and the nuclei. This study extends the concept of ionization delays introduced for atomic systems, showing that variations can be as large as those with electronic kinetic energy.
Christa Fluehmann and colleagues demonstrate a way to measure position and momentum with minimal disturbance, enabling precise measurements in a limited range. This relaxation of the uncertainty principle has fundamental implications for quantum mechanics and opens up possibilities for practical applications like quantum computing.
A novel test bed for non-equilibrium many-body physics has been created using a one-dimensional quantum wire containing a mesoscopic lattice. Researchers were able to control the interactions between electrons and observe the emergence of a band-insulating phase with weak interactions.
Researchers developed a machine-learning algorithm that identifies relevant degrees of freedom in physical systems, revolutionizing the field. The approach provides fundamental physical insight and raises the prospect of combining human creativity with machine learning.
Researchers observed attosecond optical-field-enhanced carrier injection into the GaAs conduction band, a process previously thought to be impossible. Intra-band motion plays a significant role in this phenomenon, enhancing the number of electrons excited into the conduction band.
Researchers created metastable states in an artificial quantum many-body system, observing the switching dynamics between two states. They found that thousands of atoms move through quantum tunnelling during the process.
Researchers prove the security of device-independent quantum cryptography using a new approach called entropy accumulation. This breakthrough paves the way for practical realization of such schemes with state-of-the-art quantum technology.
Researchers created a quantum many-body system using trapped atoms in an artificial crystal, enabling them to study the physics of magnetic materials. By controlled shaking of the crystal, they switched between two forms of magnetic order, a crucial process for data storage.