Experimental demonstration of spinor slow light

Lee, Meng-Jung; Ruseckas, Julius; Lee, Chin-Yuan; Kudriašov, V.; Chang, Kao-Fang; Cho, Hung-Wen; Juzeliānas, Gediminas; Yu, Ite A.

doi:10.1038/ncomms6542

Cited by 54 publications

(45 citation statements)

References 59 publications

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“…In that case one needs to stabilise properly the phases of the laser beams inducing the atomic inter-layer tunnelling and intra-layer transitions. The phase stabilisation is experimentally challenging but feasible; it has been done in a recent experiment on the two-component slow light [67].…”

Section: Elimination Of the Spatial And Temporal Dependence Of Thementioning

confidence: 99%

Tunneling-assisted spin-orbit coupling in bilayer Bose-Einstein condensates

Sun

Wen²,

Liu³

et al. 2015

Phys. Rev. A

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Motivated by a goal of realizing spin-orbit coupling (SOC) beyond one-dimension (1D), we propose and analyze a method to generate an effective 2D SOC in bilayer BECs with laser-assisted interlayer tunneling. We show that an interplay between the inter-layer tunneling, SOC and intra-layer atomic interaction can give rise to diverse ground state configurations. In particular, the system undergoes a transition to a new type of stripe phase which spontaneously breaks the time-reversal symmetry. Different from the ordinary Rashba-type SOC, a fractionalized skyrmion lattice emerges spontaneously in the bilayer system without external traps. Furthermore, we predict the occurrence of a tetracritical point in the phase diagram of the bilayer BECs, where four different phases merge together. The origin of the emerging different phases is elucidated.

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Section: Elimination Of the Spatial And Temporal Dependence Of Thementioning

confidence: 99%

Tunneling-assisted spin-orbit coupling in bilayer Bose-Einstein condensates

Sun

Wen²,

Liu³

et al. 2015

Phys. Rev. A

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“…As a result, there is no transition from the state |D to the excited states |e and |b , making the five-level closed-loop scheme transparent to the electromagnetic field. This is a new mechanism for the EIT compared with the Λ [2,8], tripod [41,42], or double tripod schemes [45,46]. It is known that the real and imaginary parts of ρ (1) ba correspond to the probe dispersion and absorption, respectively.…”

Section: Transition To a New Basismentioning

confidence: 99%

“…There has been a considerable amount of activities on single- [2-4, 8, 11, 12, 39-43] and two-component (spinor) [6,[44][45][46][47][48] slow light in atomic media induced by the EIT. The former single-complonent slow light involves a probe beam of light and one or several control beams resonantly interacting with atomic media characterized by three level Lambda (Λ) type [2,40] or four level tripod type [41,42,[49][50][51] atom-light coupling schemes.…”

Section: Introductionmentioning

confidence: 99%

“…The former single-complonent slow light involves a probe beam of light and one or several control beams resonantly interacting with atomic media characterized by three level Lambda (Λ) type [2,40] or four level tripod type [41,42,[49][50][51] atom-light coupling schemes. In the later (spinor) case, double-tripod (DT) [6,[44][45][46][47][48] coupling schemes have been considered to support a simultaneous propagation of two probe beams leading to formation of a two-component slow light.…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and Λ atom-light coupling scheme

Hamedi

Ruseckas

Juzeliūnas

2017

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. We consider propagation of a probe pulse in an atomic medium characterized by a combined tripod and Lambda (Λ) atom-light coupling scheme. The scheme involves three atomic ground states coupled to two excited states by five light fields. It is demonstrated that dark states can be formed for such an atomlight coupling. This is essential for formation of the electromagnetically induced transparency (EIT) and slow light. In the limiting cases the scheme reduces to conventional Λ-or N -type atom-light couplings providing the EIT or absorption, respectively. Thus the atomic system can experience a transition from the EIT to the absorption by changing the amplitudes or phases of control lasers. Subsequently the scheme is employed to analyze the nonlinear pulse propagation using the coupled Maxwell-Bloch equations. It is shown that generation of stable slow light optical solitons is possible in such a five-level combined tripod and Λ atomic system.

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“…Note added.−After completing this work we became aware of a related experiment with a double-tripod spinor system by Lee et al [32]. …”

mentioning

confidence: 99%

Modulation of single-photon-level wave packets with two-component electromagnetically induced transparency

2015

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Coherent manipulation of single-photon wave packets is essentially important for optical quantum communication and quantum information processing. In this paper, we realize controllable splitting and modulation of single-photon-level pulses by using a tripod-type atomic medium. The adoption of two control beams enable us to store one signal pulse into superposition of two distinct atomic collective excitations. By controlling the time delay between the two control pulses, we observe splitting of a stored wave packet into two temporally-distinct modes. By controlling the frequency detuning of the control beams, we observe both temporal and frequency-domain interference of the retrieval signal pulses, which provides a method for pulse modulation and multi-splitting of the signal photons.PACS numbers: 42.50. Gy, 42.25.Hz, 42.79.Fm, 03.67.Hk Techniques for tailoring the dispersion of materials, especially the electromagnetically induced transparency (EIT) method, enable us to control light propagation better than before and inspire lots of applications in quantum optics and atomic physics [1,2]. The ordinary EIT structure is a three-level atomic system interacting with two laser fields, named the signal and control light. By dynamically decreasing/increasing the control light power, coherent state of the signal photons could be transferred into/from the atoms, described as the atomphoton dark-state polaritons [3,4]. For now, EIT has become an important method for photonic quantum memory -an essential component of quantum information science [5,6]. Furthermore, coherent control of the spinor polaritons would lead to numbers of useful quantum state engineering.Particularly, a tripod-type four-level EIT scheme, which offers more freedom and possibilities for photon storage and manipulation, has drawn significant attentions in the last few years [7][8][9][10][11][12][13][14][15][16][17][18][19]. In the tripod-EIT configuration, three ground atomic levels are coupled with an excited level by two signal fields and one control field [15] or one signal field and two control fields. As there exist a pair of orthogonal dark-state polaritons, whose coherence depends on the amplitude and phase of the control fields, beam splitting of a signal pulse could be achieved based on this tripod-type photon storage [13,17]. In comparison with other beam-splitting methods [20][21][22], the tripod-EIT scheme highlights the simplicity and high degree of controllability. For instance, in a former experiment that using rapid coherence transport in a wallcoated atomic vapor cell [21], ratio of pulse splitting is rather difficult to control effectively. Besides, the tripod-EIT scheme offers a novel way for the modulation of single-photon wave packets [23], which would greatly benefit quantum information processing of the photonic qubits.By now, in the previous tripod-EIT experiments [15,18], constructive and destructive interference of the twocomponent dark-state polaritons has been observed, e.g., experimental demonstration of dual-channel...

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Experimental demonstration of spinor slow light

Cited by 54 publications

References 59 publications

Tunneling-assisted spin-orbit coupling in bilayer Bose-Einstein condensates

Tunneling-assisted spin-orbit coupling in bilayer Bose-Einstein condensates

Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and Λ atom-light coupling scheme

Modulation of single-photon-level wave packets with two-component electromagnetically induced transparency

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