A5101614371- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Neural Networks and Reservoir Computing
- Quantum and electron transport phenomena
- Atomic and Subatomic Physics Research
- Advancements in Semiconductor Devices and Circuit Design
- Quantum Mechanics and Applications
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Photonic and Optical Devices
- Calibration and Measurement Techniques
- Neural Networks and Applications
- Spectroscopy and Laser Applications
- Benford’s Law and Fraud Detection
- Quantum optics and atomic interactions
- Real-time simulation and control systems
- Optical Imaging and Spectroscopy Techniques
Tsinghua University
2018-2024
Geometric phases are noise resilient, and thus provide a robust way towards high-fidelity quantum manipulation. Here we experimentally demonstrate arbitrary nonadiabatic holonomic single-qubit gates for both superconducting transmon qubit microwave cavity in single-loop way. In cases, an auxiliary state is utilized, two resonant drives simultaneously applied with well-controlled but varying amplitudes the arbitrariness of gate. The resulting on achieve fidelity 0.996 characterized by...
A quantum version of generative adversarial learning is experimentally demonstrated with a superconducting circuit.
Abstract Two-mode interferometers lay the foundations for quantum metrology. Instead of exploring entanglement in two-mode interferometers, a single bosonic mode also promises measurement precision beyond shot-noise limit (SNL) by taking advantage infinite-dimensional Hilbert space Fock states. Here, we demonstrate single-mode phase estimation that approaches Heisenberg (HL) unconditionally. Due to strong dispersive nonlinearity and long coherence time microwave cavity, states form $$\left(...
Abstract Quantum sensing based on exotic quantum states is appealing for practical metrology applications and fundamental studies. However, these are vulnerable to noise the resulting enhancement weakened in practice. Here, we experimentally demonstrate a quantum-enhanced scheme with bosonic probe, by exploring large Hilbert space of mode developing both approximate error correction jump tracking approaches. In radiometry scenario, attain 5.3 dB sensitivity, which reaches 9.1 × 10 −4 Hz −1/2...
The ability to manipulate quantum systems lies at the heart of development technology. ultimate goal control is realize arbitrary operations (AQUOs) for all possible open system dynamics. However, demanding extra physical resources impose great obstacles. Here, we experimentally demonstrate a universal approach AQUO on photonic qudit with minimum resource two-level ancilla and ${\mathrm{log}}_{2}d$-scale circuit depth $d$-dimensional system. then applied in trajectory simulation subspace...
The discrimination of quantum operations has long been an intriguing challenge, with theoretical research significantly advancing our understanding the features in discriminating objects. This challenge is closely related to states, and proof-of-principle demonstrations latter have already realized using optical photons. However, experimental demonstration general operations, including both unitary non-unitary remained elusive. In systems, especially those high dimensions, preparation...
The discrimination of quantum operations has long been an intriguing challenge, with theoretical research notably advancing our understanding the features in discriminating objects. This challenge is closely related to states, and proof-of-principle demonstrations latter have already realized using optical photons. However, experimental demonstration general operations, including both unitary nonunitary remained elusive. In systems, especially those high dimensions, preparation arbitrary...
Entanglement represents one of the most important conceptual advances in physics during last century and is also essential resources quantum information science. However, entanglement fragile its potential advantages applications are hindered by decoherence practice. Here, we experimentally realize entangled logical qubits (ELQ) with a bosonic module encoding into spatially separated microwave modes. The protected repetitive error correction, coherence time purified ELQ via detection...