Electromagnetically induced transparency with superradiant and subradiant states

Feng, Wei; Wang, Dawei; Cai, Han; Zhu, Shi‐Yao; Scully, Marlan O.

doi:10.1103/physreva.95.033845

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…A theoretical group lead by J. Feng [5,6] studied our data as well as all other previous experiments in this area and showed that the evidence strongly disfavors dark photons. They proposed a new theory, however, that synthesizes all existing data and determined that the discovery could indicate a fifth fundamental force [5].…”

Section: Introductionsupporting

confidence: 54%

New results on the Be-8 anomaly

Csatlós¹,

Csige²,

Gulyás³

et al. 2017

Proceedings of 55th International Winter Meeting on Nuclear Physics — PoS(BORMIO2017)

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Recently, we measured the e + e − angular correlations in internal pair creation (IPC) for the M1 transitions depopulating the 17.6 and 18.15 MeV states in 8 Be, and observed a peak-like deviation from the predicted IPC for the 18.15 MeV transition, but not for the 17.6 MeV one. To the best of our knowledge no nuclear physics related description of such deviation can be made. The deviation between the experimental and theoretical angular correlations is significant and can be described by assuming the creation and subsequent decay of a boson with mass m 0 c 2 =16.70±0.35(stat )±0.5(sys) MeV. The branching ratio of the e + e − decay of such a boson to the γ decay of the 18.15 MeV level of 8 Be is found to be 5.8 × 10 −6 for the best fit. The data can be explained by a 17.6 MeV vector gauge boson X that is produced in the decay of the excited state to the ground state, and then decays to e + e − pairs. In the present work we re-investigated the e + e − pair correlation in the 17.6 MeV transition of 8 Be in which some smaller deviation was also expected. The branching ratio of the e + e − decay of such a boson to the γ decay was found to be (2 ± 2) × 10 −6 .

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Section: Introductionsupporting

confidence: 54%

New results on the Be-8 anomaly

Csatlós¹,

Csige²,

Gulyás³

et al. 2017

Proceedings of 55th International Winter Meeting on Nuclear Physics — PoS(BORMIO2017)

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“…Most work focuses on the low light intensity limit, where interactions between excitations is negligible and the full quantum model simplifies to a problem of classical scatterers. In these models, the collective effects can be exploited, especially when the atoms are arranged periodically on a lattice, leading to effects such as electromagnetically induced transparency interferences [13,14], long-time excitation storage in subradiant modes [15] and enhanced optical cross sections [16].…”

Section: Introductionmentioning

confidence: 99%

Phases of driven two-level systems with nonlocal dissipation

Parmee

Cooper

2018

Phys. Rev. A

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We study an array of two-level systems arranged on a lattice and illuminated by an external plane wave which drives a dipolar transition between the two energy levels. In this set up, the two-level systems are coupled by dipolar interactions and subject to nonlocal dissipation, so behave as an open many-body quantum system. We investigate the long-time dynamics of the system at the mean-field level, and use this to determine a phase diagram as a function of external drive and detuning. We find a multitude of phases including antiferromagnetism, spin density waves, oscillations and phase bistabilities. We investigate these phases in more detail and explain how nonlocal dissipation plays a role in the long-time dynamics. Furthermore, we discuss what features would survive in the full quantum description.

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“…6). However, it is reported that proper level modulation from Stark shift can induce coherent transfer between |D and |B [28]. Here we take advantage of the in-situ tunability of level spacing of a superconducting qubit.…”

Section: Parametric Drive Induced Mode Transfermentioning

confidence: 99%

Tunable $Λ$-type system made of a superconducting qubit pair

Chiang¹,

Chen²

2022

Preprint

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Two transversely coupled and resonant qubits form symmetric and antisymmetric states as their eigenstates. In this paper, we show that parametric modulation of an individual qubit enables direct Rabi swapping between the two states. Its application to setup a Λ-type system with a pair of strongly coupled superconducting transmon qubits is discussed. The excited state is made of the symmetric state and the metastable state is the antisymmetric state. The coherence of the metastable state is only limited by the pure dephasing mechanism. Based on this scheme, Λ-type electromagnetically induced transparency, Autler-Townes splitting and stimulated Raman adiabatic passage are numerically demonstrated. We highlight the large frequency tunability in such superconducting Λ-type system.

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Electromagnetically induced transparency with superradiant and subradiant states

Cited by 10 publications

References 46 publications

New results on the Be-8 anomaly

New results on the Be-8 anomaly

Phases of driven two-level systems with nonlocal dissipation

Tunable $Λ$-type system made of a superconducting qubit pair

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