Quantum switch in coupled-resonator array: Controlling single-photon transport by the state of two-level system
| Autor: | Xiao-Ke Qin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Photon Condensed matter physics business.industry Wave packet Statistical and Nonlinear Physics Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas law.invention Superposition principle Resonator law Qubit 0103 physical sciences Optoelectronics 010306 general physics business Quantum Beam splitter Computer Science::Cryptography and Security Spin-½ |
| Zdroj: | International Journal of Modern Physics B. 30:1550262 |
| ISSN: | 1793-6578 0217-9792 |
| DOI: | 10.1142/s0217979215502628 |
| Popis: | We present the model that two-level system (TLS) nonlocally interacts with one-dimensional coupled-resonator array (CRA). The coherent transport of single-photon inside CRA is well controlled by the state of TLS, which functions as quantum switch. Spin up and spin down correspond to switch on and switch off respectively, or vice versa, which originate from the constructive interference and the destructive interference of two coupling paths. We improve the fidelity of quantum switch by preadjusting the frequency of resonators which couple to TLS. Quantum switch realizes quantum beam splitter when TLS is in the superposition state. The single-photon wave packet would entangle with qubit and propagate to the remote resonators. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|