Tunable atom-light beam splitter using electromagnetically induced transparency

Zhu, Xinyu; Wen, Rong; Chen, Jiefei

doi:10.1103/physreva.97.063801

Cited by 5 publications

(5 citation statements)

References 27 publications

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“…Using Eqs. (18) and (19), the evolution of the ground-state coherence σ (r) sg,j (z, t) is as follows,…”

Section: B Reading Processmentioning

confidence: 99%

“…According to Eq. (19), the variation of Re[σ (r) sg,j ] must be accompanied by nonzero Im[σ e g,j ], which lead to energy loss of the converted light during this process. If R c j /R p j is a constant for all subsystems, there exists one converted field such that Eq.…”

Section: Schwarz Inequality One Hasmentioning

confidence: 99%

“…The amplitudes of the two frequency components can be * Corresponding author chenyc@pub.iams.sinica.edu.tw tund by varying the intensity ratio of the two control fields. Such a system can be used as a controllable frequency beam splitter for photons [9,11,15,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Theoretical study of a memory-based optical converter with degenerate Zeeman states

Tsai

Wei

et al. 2019

Phys. Rev. A

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We present a theoretical study on the efficiency variation of coherent light conversion based on optical memories using the electromagnetically induced transparency (EIT) protocol in an atomic system with degenerate Zeeman states. Based on the Maxwell-Bloch equation, we obtain an approximate analytic solution for the converted light pulses which clarifies that two major factors affecting the efficiency of the converted pulses. The first one is the finite bandwidth effect of the pulses and the difference in the delay-bandwidth product of the writing and reading channel due to the difference in the transition dipole moment. The second one is the mismatch between the stored ground-state coherence and the ratio of the Clebsch-Gordan coefficient for the probe and control transition in the reading channel which results in a non-adiabatic energy loss. To correspond to real experimental conditions, we also perform a numerical calculation of the variation in conversion efficiency versus the Zeeman population distribution under the Zeeman-state optical pumping in storing a σ + -polarized pulse and retrieving with σ − polarization in cesium atoms. Our work provides essential physical insights and quantitative knowledge for the development of a coherent optical converter based on EIT-memory.

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“…Using Eqs. (18) and (19), the evolution of the ground-state coherence σ (r) sg,j (z, t) is as follows,…”

Section: B Reading Processmentioning

confidence: 99%

Section: Schwarz Inequality One Hasmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical study of a memory-based optical converter with degenerate Zeeman states

Tsai

Wei

et al. 2019

Phys. Rev. A

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“…Currently, explanations of some quantum phenomena (e.g., the motions of single particles) still violate common sense or are counterintuitive, for example, the interference pattern of single material particles passing through splitters [1][2][3][4][5] and the quantum tunneling effect [6][7][8][9][10][11]. The typical explanations of these phenomena are as follows.…”

Section: Introductionmentioning

confidence: 99%

A Unified Explanation of Some Quantum Phenomena

Zeng

Wang

et al. 2023

Int J Theor Phys

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There has been wide interest in splitter, quantum tunneling, and double-slit experiments for a long time. The states of single material particles are typically explained as being independent of other objects (and/or electromagnetic fields) and interactions. This independence causes counterintuitive explanations. By analyzing the research conducted separately by Wineland's group and Haroche's group, we naturally deduced that the states are dependent on other objects. Based on this dependence, our unified explanation is more intuitive. We design a double-slit thought experiment that can solve the center problem, i.e., which-path information. The dependence can also work for qubits in quantum information. To emphasize and use the dependence in the future, we propose a fundamental postulate that no material particle is free as the zeroth postulate of quantum mechanics.

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“…Figs 2(d)-(e) show the outputs of the MPBS for the case of single photon detuning 30 MHz with an optical depth (OD) of 30 as an example. In the following experiments, we adjusted the coupling pulse intensities for the magnon preparation and interference steps to match the amplitudes of output photon and magnon [29]. Figure 2(d) shows the results for single port input to MPBS (either photon or magnon be vacuum state), and Fig.…”

mentioning

confidence: 99%

Non-Hermitian Magnon-Photon Interference in an Atomic Ensemble

et al. 2019

Self Cite

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The beam-splitter (BS) is one of the most common and important components in modern optics, and lossless BS which features unitary transformation induces Hermitian evolution of light. However, the practical BS based on the conversion between different degree of freedoms are naturally non-Hermitian, as a result of essentially open quantum dynamics. In this work, we experimentally demonstrate a non-Hermitian BS for the interference between traveling photonic and localized magnonic modes. The non-Hermitian magnon-photon BS is achieved by the coherent and incoherent interaction mediated by the excited levels of atoms, which is reconfigurable by adjusting the detuning of excitation. Unconventional correlated interference pattern is observed at the photon and magnon output ports. Our work is potential for extending to single-quantum level to realize interference between a single photon and magnon, which provides an efficient and simple platform for future tests of non-Hermitian quantum physics.

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Tunable atom-light beam splitter using electromagnetically induced transparency

Cited by 5 publications

References 27 publications

Theoretical study of a memory-based optical converter with degenerate Zeeman states

Theoretical study of a memory-based optical converter with degenerate Zeeman states

A Unified Explanation of Some Quantum Phenomena

Non-Hermitian Magnon-Photon Interference in an Atomic Ensemble

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