Input-output theory with time-reversal
| Autor: | Randles, Kevin, van Enk, Steven |
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| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2204.11377 |
| Popis: | We incorporate unitary transformations to the photon wave packet propagating between cascaded quantum systems in input-output theory. This is a basis for quantum state transfer between different quantum systems (quantum transduction), from system 1 to system 2. We present a transformation, $U$, that time reverses, frequency translates, and stretches the photon wave packet. $U$ can be tuned such that a wave packet emitted by system 1 is absorbed by system 2. We find concomitant modifications to the standard input-output theory that can best be understood in terms of a change to the state's time argument, $\rho(t) = \rho_1(\tilde{t}) \otimes \rho_2(t)$, where $\tilde{t}$ is a fictitious time for system 1, which runs backwards, as determined by $U$. Comment: 8 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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