A5047908792- Quantum Information and Cryptography
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Force Microscopy Techniques and Applications
- Quantum and electron transport phenomena
- Photonic and Optical Devices
- Atomic and Subatomic Physics Research
- Quantum Computing Algorithms and Architecture
- Molecular Junctions and Nanostructures
- Neural Networks and Reservoir Computing
- Semiconductor Lasers and Optical Devices
- Semiconductor materials and devices
- Topological Materials and Phenomena
- Advanced Measurement and Detection Methods
- Advanced Fiber Laser Technologies
- Graphene research and applications
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Sensor and Control Systems
- Optical Systems and Laser Technology
ETH Zurich
2022-2024
Nanjing University
2013-2018
Collaborative Innovation Center of Advanced Microstructures
2013
Institute of Applied Technology
2011
Chunghwa Telecom (Taiwan)
1997
The superposition principle is one of the most fundamental principles quantum mechanics. According to Schr\"odinger equation, a physical system can be in any linear combination its possible states. While validity this routinely validated for microscopic systems, it still unclear why we do not observe macroscopic objects superpositions states that distinguished by some classical property. Here demonstrate preparation mechanical resonator with an effective mass 16.2 micrograms cat motion,...
Recently, solid-state mechanical resonators have become a platform for demonstrating nonclassical behavior of systems involving truly macroscopic number particles. Here, we perform the most quantum test in resonator to date, which probes validity mechanics by ruling out classical description at microgram mass scale. This is done direct measurement Wigner function high-overtone bulk acoustic wave mode, monitoring gradual decay negativities over tens microseconds. While obtained macroscopicity...
Abstract In recent years, important progress has been made towards encoding and processing quantum information in the large Hilbert space of bosonic modes. Mechanical resonators have several practical advantages for this purpose, because they confine many high-quality-factor modes into a small volume can be easily integrated with different systems. However, it is challenging to create direct interactions between mechanical that used emulate gates. Here we demonstrate an situ tunable...
Abstract Mechanical degrees of freedom are natural candidates for continuous-variable quantum information processing and bosonic simulations. However, these applications require the engineering squeezing nonlinearities in regime. Here we demonstrate below zero-point fluctuations a gigahertz-frequency mechanical resonator coupled to superconducting qubit. This is achieved by parametrically driving qubit, which results an effective two-phonon drive. In addition, show that mode inherits...
Although strong nonlinear interactions between quantized excitations are an important resource for quantum technologies based on bosonic oscillator modes, most electromagnetic and mechanical nonlinearities far too weak to allow effects be observed at the single-quantum level. This limitation has been overcome in resonators by coupling them other strongly systems such as atoms superconducting qubits. We demonstrate realization of single-phonon regime a solid-state system. The anharmonicity...
A composite system of Majorana-hosted semiconductor nanowire and superconducting flux qubits, named top-flux-flux, is presented to process quantum information. We can electrically control the coupling between Majorana-based topological qubit readout qubit, supplying a convenient method implement $\ensuremath{\pi}/8$ phase gate qubit. In addition, we design scheme transfer information back forth by employing Landau-Zener transition. With demonstration entanglement two it very promising use...
We implemented the superadiabatic population transfer within nonadiabatic regime in a two-level superconducting qubit system. To realize procedure, we added an additional term Hamiltonian, introducing auxiliary counter-diabatic field to cancel contribution evolution. Based on further demonstrated quantum Phase and NOT gates. These operations, which possess both of fast robust features, are promising for information processing.
Mechanical degrees of freedom are natural candidates for continuous-variable quantum information processing and bosonic simulations. These applications, however, require the engineering squeezing nonlinearities in regime. Here we demonstrate ground state a gigahertz-frequency mechanical resonator coupled to superconducting qubit. This is achieved by parametrically driving qubit, which results an effective two-phonon drive. In addition, show that mode inherits nonlinearity from off-resonant...
As superconducting quantum circuits are scaling up rapidly towards the noisy intermediate-scale (NISQ) era, demand for electronic control equipment has increased significantly. To fully a chip of N qubits, common method based on up-conversion technology costs at least 2 × digital-to-analog converters (DACs) and IQ mixers. The expenses complicate mixer calibration have become hinderance control. Here we propose universal scheme circuits, parametric modulation. qubits chip, our only requires...
As its characteristics of the vehicle-mounted howitzer, barrel during firing is more prone to erosion which caused by wear and tear crack. For real-time accurate grasping defect information, research on testing System for crackle based eddy current Sensor studied. The system contains oscillator, probe, filter enlarge, GPS position, display modular other circuit. When probe detect pipe crackle, circuit become mutated signals (sensitive signal), sensitive segments amplification, filtering...
In superconducting circuit, microwave resonators and capacitors are crucial components, their quality has a strong impact on circuit performance. Here we develop novel wet etching process to define these two components using common photoresist developer as etchant. This method reduces subsequent steps can be completed immediately after development. By measuring the internal factor of resonators, show that it is possible achieve similar or better performance when compared with samples made by...
Wafer-bonded AlAs/GaAs mirrors and AlGaInAs strain- compensated multiple quantum well active layers have been applied into 1.3 micrometer vertical-cavity surface-emitting lasers (VCSELs). Double-bonded VCSELs operated at room temperature pulsed conditions with a high output power of 4.6 mW, characteristic 132 K, large side-mode suppression-ratio 42 dB. A novel more practical approach for proposed demonstrated very low threshold current density 1.13 kA/cm<SUP>2</SUP> 2 mA. Further improvement...