GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • IOP Publishing  (14)
  • 1
    Online Resource
    Online Resource
    Electromagnetically induced transparency in modulated laser fields
    IOP Publishing ; 2017
    In:  Journal of Physics B: Atomic, Molecular and Optical Physics Vol. 50, No. 3 ( 2017-02-14), p. 035001-
    Details
    In: Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, Vol. 50, No. 3 ( 2017-02-14), p. 035001-
    Type of Medium: Online Resource
    ISSN: 0953-4075 , 1361-6455
    URL: Article
    DOI: 10.1088/1361-6455/aa547b
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 3111439-8
    detail.hit.zdb_id: 209218-9
    detail.hit.zdb_id: 1363381-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Photon correlation transients in a weakly blockaded Rydberg ensemble
    IOP Publishing ; 2020
    In:  Journal of Physics B: Atomic, Molecular and Optical Physics Vol. 53, No. 8 ( 2020-04-28), p. 084005-
    Details
    In: Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, Vol. 53, No. 8 ( 2020-04-28), p. 084005-
    Abstract: The nonlinear and non-local effects in atomic Rydberg media under electromagnetically induced transparency (EIT) make it a versatile platform for fundamental studies and applications in quantum information. In this paper, we study the dynamics of a Rydberg-EIT system in an ensemble that allows for more than one Rydberg excitation in the propagation direction. The density of two-level atoms is such that transient superradiant effects occur. We experimentally observe a cross-over between coherent collective emission (‘flash’) of two-level atoms to a Rydberg dressed regime (‘dressed flash’) under EIT condition. The complex dynamics are characterised using both intensity and time correlation measurements. We show that while steady-state EIT gives a second order correlation g (2)  = 0.79 ± 0.04, the Rydberg-dressed flash exhibits anti-bunching down to 0.2 ± 0.04.
    Type of Medium: Online Resource
    ISSN: 0953-4075 , 1361-6455
    URL: Article
    DOI: 10.1088/1361-6455/ab728f
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 3111439-8
    detail.hit.zdb_id: 209218-9
    detail.hit.zdb_id: 1363381-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Precise measurement of a weak radio frequency electric field using a resonant atomic probe*
    IOP Publishing ; 2020
    In:  Chinese Physics B Vol. 29, No. 3 ( 2020-03-01), p. 033201-
    Details
    In: Chinese Physics B, IOP Publishing, Vol. 29, No. 3 ( 2020-03-01), p. 033201-
    Abstract: We present a precise measurement of a weak radio frequency electric field with a frequency of ≲ 3 GHz employing a resonant atomic probe that is constituted with a Rydberg cascade three-level atom, including a cesium ground state |6S 1/2 ⟩, an excited state |6P 3/2 ⟩, and Rydberg state | n D 5/2 ⟩. Two radio frequency (RF) electric fields, noted as local and signal fields, couple the nearby Rydberg transition. The two-photon resonant Rydberg electromagnetically induced transparency (Rydberg-EIT) is employed to directly read out the weak signal field having hundreds of kHz difference between the local and signal fields that is encoded in the resonant microwave-dressed Rydberg atoms. The minimum detectable signal fields of E S min = 1.36 ± 0.04 mV/m for 2.18 GHz coupling |68D 5/2 ⟩ → |69P 3/2 ⟩ transition and 1.33 ± 0.02 mV/m for 1.32 GHz coupling |80D 5/2 ⟩ → |81P 3/2 ⟩ transition are obtained, respectively. The bandwidth dependence is also investigated by varying the signal field frequency and corresponding −3 dB bandwidth of 3 MHz is attained. This method can be employed to perform a rapid and precise measurement of the weak electric field, which is important for the atom-based microwave metrology.
    Type of Medium: Online Resource
    ISSN: 1674-1056
    URL: Article
    DOI: 10.1088/1674-1056/ab6c49
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 2412147-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Laser frequency locking based on Rydberg electromagnetically induced transparency
    IOP Publishing ; 2016
    In:  Chinese Physics B Vol. 25, No. 5 ( 2016-05), p. 053201-
    Details
    In: Chinese Physics B, IOP Publishing, Vol. 25, No. 5 ( 2016-05), p. 053201-
    Type of Medium: Online Resource
    ISSN: 1674-1056
    URL: Article
    DOI: 10.1088/1674-1056/25/5/053201
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 2412147-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Nonlinear spectroscopy of three-photon excitation of cesium Rydberg atoms in vapor cell*
    IOP Publishing ; 2021
    In:  Chinese Physics B Vol. 30, No. 3 ( 2021-03-01), p. 034207-
    Details
    In: Chinese Physics B, IOP Publishing, Vol. 30, No. 3 ( 2021-03-01), p. 034207-
    Abstract: We present nonlinear spectra of four-level ladder cesium atoms employing 6 S 1/2 → 6 P 3/2 → 7 S 1/2 → 30 P 3/2 scheme of a room temperature vapor cell. A coupling laser drives Rydberg transition, a dressing laser couples two intermediate levels, and a probe laser optically probes the nonlinear spectra via electromagnetically induced transparency (EIT). Nonlinear spectra are detected as a function of coupling laser frequency. The observed spectra exhibit an enhanced absorption (EA) signal at coupling laser resonance to Rydberg transition and enhanced transmission (ET) signals at detunings to the transition. We define the enhanced absorption (transmission) strength, H EA ( H ET ), and distance between two ET peaks, γ ET , to describe the spectral feature of the four-level atoms. The enhanced absorption signal H EA is found to have a maximum value when we vary the dressing laser Rabi frequency Ω d , corresponding Rabi frequency is defined as a separatrix point, Ω d Se . The values of Ω d Se and further η = Ω d Se / Ω c are found to depend on the probe and coupling Rabi frequency but not the atomic density. Based on Ω d Se , the spectra can be separated into two regimes, weak and strong dressing ranges, Ω d ≲ Ω d Se and Ω d ≳ Ω d Se , respectively. The spectroscopies display different features at these two regimes. A four-level theoretical model is developed that agrees well with the experimental results in terms of the probe-beam absorption behavior of Rabi frequency-dependent dressed states.
    Type of Medium: Online Resource
    ISSN: 1674-1056
    URL: Article
    DOI: 10.1088/1674-1056/abca25
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2412147-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Quantum sensing of microwave electric fields based on Rydberg atoms
    IOP Publishing ; 2023
    In:  Reports on Progress in Physics Vol. 86, No. 10 ( 2023-10-01), p. 106001-
    Details
    In: Reports on Progress in Physics, IOP Publishing, Vol. 86, No. 10 ( 2023-10-01), p. 106001-
    Abstract: Microwave electric field (MW E-field) sensing is important for a wide range of applications in the areas of remote sensing, radar astronomy and communications. Over the past decade, Rydberg atoms have been used in ultrasensitive, wide broadband, traceable, stealthy MW E-field sensing because of their exaggerated response to MW E-fields, plentiful optional energy levels and integratable preparation methods. This review first introduces the basic concepts of quantum sensing, the properties of Rydberg atoms and the principles of quantum sensing of MW E-fields with Rydberg atoms. An overview of this very active research direction is gradually expanding, covering the progress of sensitivity and bandwidth in Rydberg atom-based microwave sensing, superheterodyne quantum sensing with microwave-dressed Rydberg atoms, quantum-enhanced sensing of MW E-field and recent advanced quantum measurement systems and approaches to further improve the performance of MW E-field sensing. Finally, a brief outlook on future development directions is provided.
    Type of Medium: Online Resource
    ISSN: 0034-4885 , 1361-6633
    URL: Article
    DOI: 10.1088/1361-6633/acf22f
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 205657-4
    detail.hit.zdb_id: 1361309-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Distinct antiblockade features of strongly interacting Rydberg atoms under a two-color weak excitation scheme
    IOP Publishing ; 2020
    In:  New Journal of Physics Vol. 22, No. 1 ( 2020-01-01), p. 013004-
    Details
    In: New Journal of Physics, IOP Publishing, Vol. 22, No. 1 ( 2020-01-01), p. 013004-
    Abstract: We present distinct antiblockade features of strongly interacting 64 D 5/2 Rydberg atoms employing a two-color excitation scheme. The first color (pulse A) is set to resonantly excite a few seed Rydberg atoms, each of which establishes a blockade region due to the long-range multipole interactions. The second color (pulse B) is blue detuned so that the multipole-interaction-induced shifts of certain atoms are well compensated to result in the antiblockade effect. We find in particular that a few seed atoms can lead to a remarkable difference of the Rydberg excitation in the presence of pulse B for a wide range of blue detuning. Relevant dynamics of this antiblockade excitation is also investigated by varying the pulse-B duration for a fixed blue detuning, further confirming the facilitation process of Rydberg excitation accompanied by a saturation effect. These experimental results can be well recovered by theoretical simulations based on a multilevel two-body model.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    URL: Article
    DOI: 10.1088/1367-2630/ab6575
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1464444-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Observation of blackbody radiation enhanced superradiance in ultracold Rydberg gases
    IOP Publishing ; 2021
    In:  New Journal of Physics Vol. 23, No. 8 ( 2021-08-01), p. 083017-
    Details
    In: New Journal of Physics, IOP Publishing, Vol. 23, No. 8 ( 2021-08-01), p. 083017-
    Abstract: An ensemble of excited atoms can synchronize emission of light collectively in a process known as superradiance when its characteristic size is smaller than the wavelength of emitted photons. The underlying superradiance depends strongly on electromagnetic (photon) fields surrounding the atomic ensemble. High mode densities of microwave photons from 300 K blackbody radiation (BBR) significantly enhance decay rates of Rydberg states to neighbouring states, enabling superradiance that is not possible with bare vacuum induced spontaneous decay. Here we report observations of the superradiance of ultracold Rydberg atoms embedded in a bath of room-temperature photons. The temporal evolution of the Rydberg | nD ⟩ to |( n + 1) P ⟩ superradiant decay of Cs atoms ( n the principal quantum number) is measured directly in free space. Theoretical simulations confirm the BBR enhanced superradiance in large Rydberg ensembles. We demonstrate that the van der Waals interactions between Rydberg atoms change the superradiant dynamics and modify the scaling of the superradiance. In the presence of static electric fields, we find that the superradiance becomes slow, potentially due to many-body interaction induced dephasing. Our study provides insights into many-body dynamics of interacting atoms coupled to thermal BBR, and might open a route to the design of blackbody thermometry at microwave frequencies via collective, dissipative photon-atom interactions.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    URL: Article
    DOI: 10.1088/1367-2630/ac136c
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 1464444-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Precise measurements of polarizabilities of cesium nS Rydberg states in an ultra-cold atomic ensemble
    IOP Publishing ; 2020
    In:  New Journal of Physics Vol. 22, No. 9 ( 2020-09-01), p. 093032-
    Details
    In: New Journal of Physics, IOP Publishing, Vol. 22, No. 9 ( 2020-09-01), p. 093032-
    Abstract: We present precise measurements of polarizabilities of cesium n S 1/2 ( n = 65–75) Rydberg states by Stark spectroscopies. In experiment, Rydberg atoms are excited via a two-photon scheme of a standard magneto-optical trap and detected by the field ionization technique. The Stark shift is measured by analysing the spectroscopy under an external electric field. The polarizability, α , is acquired by fitting the experimental data of Stark shifts with Δ W = − 1 2 α E 2 . The theoretical model is applied to numerically simulate the Stark map and corresponding level shifts, related deviation between the experimental measurements and calculations are less than 2%. The scaling law of polarizabilities, A ⋅ ( n * ) 7 + B ⋅ ( n * ) 6 ( n * is effective principal quantum number), is attained, that shows a good agreement with the measurements.
    Type of Medium: Online Resource
    ISSN: 1367-2630
    URL: Article
    DOI: 10.1088/1367-2630/abaf30
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1464444-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Adiabatic potentials of cesium ( nD J ) 2 Rydberg–Rydberg macrodimers
    IOP Publishing ; 2019
    In:  Journal of Physics B: Atomic, Molecular and Optical Physics Vol. 52, No. 13 ( 2019-07-14), p. 135102-
    Details
    In: Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, Vol. 52, No. 13 ( 2019-07-14), p. 135102-
    Type of Medium: Online Resource
    ISSN: 0953-4075 , 1361-6455
    URL: Article
    DOI: 10.1088/1361-6455/ab1371
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 3111439-8
    detail.hit.zdb_id: 209218-9
    detail.hit.zdb_id: 1363381-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...