A5021147142- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Radio Frequency Integrated Circuit Design
- Photonic and Optical Devices
- Quantum Mechanics and Applications
- Spectroscopy and Quantum Chemical Studies
- Mechanical and Optical Resonators
- Quantum Computing Algorithms and Architecture
- Quantum and electron transport phenomena
- Semiconductor Lasers and Optical Devices
National Tsing Hua University
2022-2024
Santa Clara University
2003
We consider the dynamics and stationary regime of a capacitively-shunted transmon-type qubit in front mirror, affected by two signals: probe dressing signals. By varying parameters these signals then analyzing signal (reflected atom-mirror system), it is possible to explore system dynamics, which can be described Bloch equation. The obtained time-dependent occupation probabilities are related experimentally measured reflection coefficient. study this type opens up new horizons for better...
Loading quantum information deterministically onto a node is an important step toward network. Here, we demonstrate that coherent-state microwave photons with optimal temporal waveform can be efficiently loaded single superconducting artificial atom in semi-infinite one-dimensional (1D) transmission-line waveguide. Using weak coherent state (the number of (N) contained the pulse ≪1) exponentially rising waveform, whose time constant matches decoherence atom, loading efficiency 94.2% ± 0.7%...
Exact formulae are presented for both maximum available gain (G/sub ma/) and unilateral (U), which include the magnitude phase angle of S/sub 21/ parameter. The result G/sub ma/ is not unique since there many possible solutions to simultaneously match 11/ 22/ when k>1. For U, tends become 180/spl deg/ using topology a variable coupler, line stretcher, feedback amplifier. From verifications, an amplifier unilateralizing technique will achieve 4-6 dB higher than that
A coherent electromagnetic field can be described by its amplitude, frequency, and phase. All these properties influence the interaction between an atom. Here we demonstrate phase shaping of microwaves that are scattered a superconducting artificial atom coupled to end semi-infinite one-dimensional transmission line. In particular, input weak exponentially rising pulse with modulation transmon qubit. We observe atom-field tuned from nearly full (interaction efficiency, i.e., amount energy...
We investigate the amplification of a microwave probe signal by superconducting artificial atom, transmon, strongly coupled to end one-dimensional semi-infinite transmission line. The line acts as mirror for fields. Due weak anharmonicity strong pump field creates multi-photon excitations among dressed states. Transitions between these states, Rabi sidebands, give rise either or attenuation probe. obtain maximum amplitude about 18 %, higher than in any previous experiment with single due...
A coherent electromagnetic field can be described by its amplitude, frequency, and phase. All these properties influence the interaction between an atom. Here we demonstrate phase shaping of microwaves that are scattered a superconducting artificial atom coupled to end semi-infinite 1D transmission line. In particular, input weak exponentially rising pulse with modulation transmon qubit. We observe field-atom tuned from nearly full (interaction efficiency, i.e., amount energy interacting...
In one-dimensional quantum emitter systems, the dynamics of atomic excitations are influenced by collective coupling between emitters through photon-mediated dipole-dipole interactions. By introducing positional disorders in a portion array, we investigate delocalization phenomena at interface disordered zone and clean zone. The excitation is initialized as symmetric Dicke states zone, several measures used to quantify localization. We first use population imbalance half-chain entropy under...
We consider the dynamics and stationary regime of a capacitively-shunted transmon-type qubit in front mirror, affected by two signals: probe dressing signals. By varying parameters these signals then analyzing signal (reflected atom-mirror system), it is possible to explore system dynamics, which can be described Bloch equation. The obtained time-dependent occupation probabilities are related experimentally measured reflection coefficient. study this type opens up new horizons for better...