Non-Markovian super-superradiance in a linear chain of up to 100 qubits
| Autor: | Agata M. Brańczyk, Fatih Dinc |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Quantum Physics Condensed Matter::Other FOS: Physical sciences Physics::Optics Markov process Superradiance Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences 010305 fluids & plasmas Wavelength symbols.namesake Chain (algebraic topology) Qubit Quantum mechanics 0103 physical sciences symbols Waveguide (acoustics) Quantum Physics (quant-ph) 010306 general physics |
| Zdroj: | Physical Review Research. 1 |
| ISSN: | 2643-1564 |
| DOI: | 10.1103/physrevresearch.1.032042 |
| Popis: | We study non-Markovian enhancement effects in the spontaneous emission of a collective excitation in a linear chain of up to 100 qubits coupled to a 1D waveguide. We find that for a critical separation of qubits, the system exhibits super-superradiant (SSR) behavior leading to collective decay stronger than the usual Dicke superradiance. Here, time-delayed coherent quantum feedback effects are at play on top of the usual Dicke superradiance effects. We find a linear scaling for the SSR decay rate with increasing qubit number $N$ such that $\Gamma_{\rm SSR} \sim 2.277 N \gamma_0$, where $\gamma_0$ is the single emitter decay rate to a one-dimensional waveguide, as opposed to $\Gamma_{\rm Dicke}\sim N \gamma_0$ for Dicke superradiance. The SSR decay rate can be tuned with qubit separation distance and may therefore have application for quantum technologies. |
| Databáze: | OpenAIRE |
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