Echoes in gaseous media: A generalized theory of rephasing phenomena

Mossberg, T. W.; Kachru, R.; Hartmann, S. R.; Flusberg, A.

doi:10.1103/physreva.20.1976

Cited by 164 publications

(34 citation statements)

References 63 publications

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“…A rephasing of atomic coherence will now occur in the negative z direction a time interval t after the second laser pulse (i.e., time interval 2t 1 T after the singlephoton wave packet). Several different photon echo processes in three-level systems of similar type have been investigated and experimentally demonstrated [7]. However, the novel feature in our scheme is that here the rephasing process reproduces an exact time-reversed counterpropagating replica of the input single-photon wave packet; moreover, our scheme creates a rephasing process where the absorption process is replayed in a time-reversed mode, forcing the material to reemit what it previously absorbed.…”

mentioning

confidence: 99%

Complete Reconstruction of the Quantum State of a Single-Photon Wave Packet Absorbed by a Doppler-Broadened Transition

Моисеев

Kröll²

2001

Phys. Rev. Lett.

341

392

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confidence: 99%

Complete Reconstruction of the Quantum State of a Single-Photon Wave Packet Absorbed by a Doppler-Broadened Transition

Моисеев

Kröll²

2001

Phys. Rev. Lett.

341

392

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“…For the phase matching condition k 1 ¡ k 0 1 ‡ k 3 the three-pulse stimulated photon-echoes exist for the perturbation chains (I) and (III). For the phase matching condition k 2 ¡ k 0 2 ‡ k 3 , the three-pulse stimulated photon-echo exists for the perturbation chain (V) [11]. Under the Doppler-broadened limit (i.e.…”

Section: Photon-echomentioning

confidence: 99%

“…We have also investigated the relationship between PBVTS and other Doppler-free techniques in frequency and in time domains. It is found that PBVTS is closely related to the Doppler-free saturated absorption spectroscopy [8] and the three-pulse stimulated photon echo [11] when the pump beams are narrow band and broadband linewidth, respectively. However, it possesses the main advantages of these techniques in the frequency domain and in the time domain.…”

Section: Introductionmentioning

confidence: 99%

Correlation effects of chaotic and phase-diffusion fields on polarization beats in a V-type three-level system

Zhang

et al. 2001

Journal of Modern Optics

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The correlation eå ects of fourth-order on polarization beats in a V-type three-level system (PBVTS) are investigated using chaotic and phasediå usion models. It has been found that the temporal behaviour of the beat signal depends on the stochastic properties of the lasers and transverse relaxation rate of the transitions, and the modulation terms of the beat signal depend on the second-order coherence function, which is determined by the laser line shape. Since diå erent stochastic models of the laser eld aå ect only the fourthorder coherence function, they have little in uence on the general temporal modulation behaviour of the beat signal. The diå erent roles of the phase uctuation and amplitude uctuation have been pointed out in the time domain. The fourth-order coherence function theory of chaotic eld is of vital importance in PBVTS. The cases where the pump beams have either narrow band or broadband linewidth are considered and it has been found that for both cases a Doppler-free precision in the measurement of the energy-level splitting between two states can be achieved. Finally, the diå erence between the PBVTS and DeBeer' s ultrafast modulation spectroscopy is discussed as well from a physical viewpoint.

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“…Such behavior can be identified as a kind of timeresolved four-wave mixing (specifically a kind of photon echo [26]) involving the original probe pulse k, two control beams (k c and k c ), as well as a regenerated probe pulse k ; the wave-vectors satisfy the phase matching condition k − k c = k − k c . A distinctive feature of the present situation is the involvement of slow polaritons in the EIT media.…”

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Slow Polaritons in Atomic Bose-Einstein Condensates

Juzeliūnas¹,

Carmichael

2003

Coherence and Quantum Optics VIII

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We consider the slowing down and storing of laser pulses in atomic Bose-Einstein condensates (BEC). The theory is based on the concept of slow polaritons for describing the propagation of laser pulses in an electromagnetically induced transparency (EIT) medium. A general treatment shows the possibility to revert the stopped polaritons. In contrast to the previous analysis of EIT polaritons, the slow polaritons need not necessarily be at the exact EIT resonance, in which case they acquire a finite radiative lifetime. It is shown that the slow polariton can be moved out of the EIT resonance by reversing the control beam; the effect is most significant for counter-propagating control and probe lasers. 32.70.Jz, 42.50.Fx, Recently, electromagnetically induced transparency (EIT) [1][2][3][4] was shown to slow down dramatically [5], or even to stop completely [6,7], laser pulses in atomic gases. The experiments [5-7] involve media of three-level atoms interacting with two lasers-a control beam and a probe pulse. The atoms have two hyperfine ground states, |g and |q , and an electronically excited state |e , as illustrated in Fig. 1(a). The level g is populated initially (before applying the probe pulse to couple the states |g and |e ). The role of the control beam is to introduce a transparency window for the probe pulse which then propagates slowly in the medium. Such behavior can be understood in terms of a branch of slow polaritons appearing between two close atomic resonances, as shown in Fig. 2 (see also Fig. 2b in Ref. [8]). In fact, the control laser couples dynamically the states |q and |e , bringing the level |q into resonance with the excited state |e . Consequently, the excited level splits into the doublet [ Fig. 1(b)] required for the formation of a branch of slow polaritons as shown in Fig. 2. Polaritons are the normal modes of a combined system of the radiation field and matter. Over the last decade the polariton concept has been applied widely to describe the quantized radiation field in dielectric media [8][9][10][11][12][13][14]. Most of these studies, however, have been designed for media composed of two-level atoms, and hence do not accommodate the slow EIT polaritons. Slow polaritons appear in the analysis beyond the two-level model [8,13,14]. Yet the existing theoretical work [8,13,14] does not deal specifically with EIT. More recently, EIT (dark state) polaritons were considered by Fleischhauer and Lukin [15,16] who predicted the storage of a probe pulse (stopping of the polariton) by switching off the control laser.Here we present a general treatment of slow polaritons in EIT media. Our analysis shows the possibility to revert the stopped polariton. The theory is designed for atomic Bose-Einstein condensates (BECs), yet the findings are relevant to ordinary atomic gases as well. In contrast to the previous analysis of EIT polaritons [15][16][17], the slow polariton is now not necessarily at the exact EIT resonance. (For instance, the slow polariton can be moved out of the EIT resonance by rever...

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Echoes in gaseous media: A generalized theory of rephasing phenomena

Cited by 164 publications

References 63 publications

Complete Reconstruction of the Quantum State of a Single-Photon Wave Packet Absorbed by a Doppler-Broadened Transition

Complete Reconstruction of the Quantum State of a Single-Photon Wave Packet Absorbed by a Doppler-Broadened Transition

Correlation effects of chaotic and phase-diffusion fields on polarization beats in a V-type three-level system

Slow Polaritons in Atomic Bose-Einstein Condensates

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