Publications by authors named "Feitong Jin"
Article Synopsis
- Non-equilibrium quantum transport is essential for advancing technologies like nanoelectronics and thermal management, focusing on energy and particle transfer through quantum channels.
- Using a superconducting quantum processor, researchers demonstrated non-equilibrium steady quantum transport by creating "baths" with qubit ladders, showing that particle currents were consistent regardless of how the baths were initialized.
- This study provides experimental support for theories in statistical mechanics and prethermalisation, while also allowing precise control over variables that affect steady currents, opening new avenues for exploring quantum transport in complex quantum systems.
Article Synopsis
- Topologically ordered phases of matter go beyond traditional theories of symmetry-breaking, exhibiting unique traits like long-range entanglement and resilience to local changes.
- The research focuses on observing a prethermal topologically ordered time crystal using superconducting qubits in a square lattice that are periodically driven, revealing new dynamics not seen in thermal equilibrium.
- Findings include identifying discrete time-translation symmetry breaking and demonstrating the connection to topological order through measuring topological entanglement entropy, showcasing the potential for exploring novel phases of matter with quantum processors.
Article Synopsis
- GHZ states, also known as two-component Schrödinger cats, are essential in quantum physics and have potential applications in advanced computing, but they are sensitive to noise and difficult to control.* -
- The study introduces a new strategy that enhances the creation, preservation, and manipulation of large-scale GHZ entanglement, featuring experiments with digital quantum circuits achieving entanglement with up to 60 qubits.* -
- It utilizes discrete time crystals to increase the lifespan of GHZ states and demonstrates that superconducting processors can be an effective platform for exploring quantum entanglement and new applications.*
The ability to realize high-fidelity quantum communication is one of the many facets required to build generic quantum computing devices. In addition to quantum processing, sensing, and storage, transferring the resulting quantum states demands a careful design that finds no parallel in classical communication. Existing experimental demonstrations of quantum information transfer in solid-state quantum systems are largely confined to small chains with few qubits, often relying upon non-generic schemes.
View Article and Find Full Text PDFEmerging quantum technologies hold the promise of unravelling difficult problems ranging from condensed matter to high-energy physics while, at the same time, motivating the search for unprecedented phenomena in their setting. Here, we use a custom-built superconducting qubit ladder to realize non-thermalizing states with rich entanglement structures in the middle of the energy spectrum. Despite effectively forming an "infinite" temperature ensemble, these states robustly encode quantum information far from equilibrium, as we demonstrate by measuring the fidelity and entanglement entropy in the quench dynamics of the ladder.
View Article and Find Full Text PDFTopological photonics provides a powerful platform to explore topological physics beyond traditional electronic materials and shows promising applications in light transport and lasers. Classical degrees of freedom are routinely used to construct topological light modes in real or synthetic dimensions. Beyond the classical topology, the inherent quantum nature of light provides a wealth of fundamentally distinct topological states.
View Article and Find Full Text PDFArticle Synopsis
- * Researchers conducted experiments using superconducting qubits to create quantum classifiers that can recognize real-life images and quantum data with high accuracy.
- * The well-trained quantum classifiers were shown to be susceptible to small adversarial changes, but implementing adversarial training techniques significantly improved their resistance to these attacks.
Quantum many-body systems away from equilibrium host a rich variety of exotic phenomena that are forbidden by equilibrium thermodynamics. A prominent example is that of discrete time crystals, in which time-translational symmetry is spontaneously broken in periodically driven systems. Pioneering experiments have observed signatures of time crystalline phases with trapped ions, solid-state spin systems, ultracold atoms and superconducting qubits.
View Article and Find Full Text PDF