Two-color quantum memory in double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Λ</mml:mi></mml:math>media

Viscor, Daniel; Ahufinger, V.; Mompart, J.; Zavatta, Alessandro; Rocca, G. C. La; Artoni, M.

doi:10.1103/physreva.86.053827

Cited by 13 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can serve as a quantum frequency converter for the interface between different quantum nodes in a quantum network. Furthermore, by turning on both control fields during retrieval, the stored atomic coherence can be simultaneously released into two separate photonic channels with the amplitude ratio controlled by the intensity ratio of the two control fields 5 , 7 , 8 , 10 , thereby serving as a frequency-domain tunable beam splitter 11 or two-color quantum memory 12 .…”

Section: Introductionmentioning

confidence: 99%

Memory-based optical polarization conversion in a double-$$\Lambda$$ atomic system with degenerate Zeeman states

Wei

Lin

Tsai

et al. 2020

Sci Rep

View full text Add to dashboard Cite

optical memory based on the electromagnetically induced transparency (eit) in a double-atomic system provides a convenient way to convert the frequency, bandwidth or polarization of an optical pulse by storing it in one channel and retrieving it from another. this memory-based optical converter can be used to bridge the quantum nodes which have different physical properties in a quantum network. However, in real atoms, each energy level usually contains degenerate Zeeman states, which may lead to additional energy loss, as has been discussed in our recent theoretical paper (Tsai et al. in Phys. Rev. A 100, 063843). Here, we present an experimental study on the efficiency variation in the eit-memory-based optical polarization conversion in cold cesium atoms under Zeeman-state optical pumping. The experimental results support the theoretical predictions. Our study provides quantitative knowledge and physical insight useful for practical implementation of an eit-memory-based optical converter. The storage and retrieval of light pulses in atomic ensembles using the effect of electromagnetically induced transparency (EIT) in a three-level-system has been intensively studied. It has the important application to implement optical quantum memory for quantum information processing 1,2. By controlling the intensity, frequency or direction of the control field during the retrieval process, the temporal width, frequency or propagating direction of the retrieved probe pulses can be manipulated 3-6. With a four-level double-system, the wavelength of the retrieved probe pulses can be widely manipulated by turning on the control field of the second system during the retrieval process 6-9. This can serve as a quantum frequency converter for the interface between different quantum nodes in a quantum network. Furthermore, by turning on both control fields during retrieval, the stored atomic coherence can be simultaneously released into two separate photonic channels with the amplitude ratio controlled by the intensity ratio of the two control fields 5,7,8,10 , thereby serving as a frequency-domain tunable beam splitter 11 or two-color quantum memory 12. However, each energy level usually contains degenerate Zeeman states in real atoms, which may induce some complications in the memory-based optical conversion with a doublesystem. In a recent theoretical work 13 , we identified the two factors affecting the efficiency of the converted pulses. The first factor is the finite bandwidth effect of the optical pulses and the difference in the optical depth of the storage and retrieval channels. The second factor is the incompatibility between the stored ground-state coherence and the ratio of the probe and control Clebsch-Gordan coefficients of the conversion channel, which leads to a nonadiabatic energy loss in the retrieved pulses 6,7,14. We obtained an approximate relation for the conversion efficiency. In addition, we also numerically studied the dependence of those two factors on the Zeeman population distribution, facilitated by opt...

show abstract

Section: Introductionmentioning

confidence: 99%

Memory-based optical polarization conversion in a double-$$\Lambda$$ atomic system with degenerate Zeeman states

Wei

Lin

Tsai

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The recent experiments [12,13,14] on EIT-based quantum memory demonstrate the continuously improving efficiency and fidelity. There are different ways to encode the single-photon qubit, for example, in two spectral components of the photon pulse, as it was recently proposed in [15], but the most natural way for qubit encoding is provided by the photon two polarization degrees of freedom, as it was implemented in the experiments [12,13]. To store the photon polarization qubit its both polarization components must be effectively stopped in the medium, however the group velocities of these two components may differ essentially due to the optical anisotropy induced by the polarization of the coupling field.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetically induced transparency with degenerate atomic levels

Решетов¹,

Meleshko²

2014

Laser Phys.

View full text Add to dashboard Cite

For the coherently driven Λ-type three-level systems the general readyto-calculate expression for the susceptibility tensor at the frequency of the weak probe field is obtained for the arbitrary polarization of the strong coupling laser field and arbitrary values of the angular momenta of resonant atomic levels. The dependence of the relative difference in the group velocities of the two polarization components of the probe field on the polarization of the coupling field is studied. ∆ c J c ∆ b J a J c

show abstract

“…This state may be envisaged as the frequency counterpart of the familiar single-photon path entanglement [10,11], which can also be extended to temporal domain [12] and used as a important resource in quantum protocols to convey and process quantum information [13][14][15][16]. The propagation of color-entangled states through a specific atomic interface has also been studied [17], together with their mapping into a quantum memory based on electromagnetically induced transparency technique in a double-Λ media [18]. Therefore, the scheme proposed here represent an additional building block to realize a quantum network, in which colour-entanglement is generated, manipulated and stored.…”

mentioning

confidence: 99%

Engineering of heralded narrowband color-entangled states

2019

Self Cite

View full text Add to dashboard Cite

Efficient heralded generation of entanglement together with its manipulation is of great importance for quantum communications. In addition, states generated with bandwidths naturally compatible with atomic transitions allow a more efficient mapping of light into matter which is an essential requirement for long distance quantum communications. Here we propose a scheme where the indistinguishability between two spontaneous four-wave mixing processes is engineered to herald generation of single-photon frequency-bin entangled states, i.e. single-photons shared by two distinct frequency modes. We show that entanglement can be optimised together with the generation probability, while maintaining absorption negligible. Besides, the scheme illustrated for cold rubidium atoms is versatile and can be implemented in several other physical systems.t e x i t s h a 1 _ b a s e 6 4 = " n V q k N v e t 0 T l j / 7 a y O X i 1 8 h + 5 h M M = " > A A A B + 3 i c d V D L S g M x F M 3 4 r P U 1 2 q W b Y B F c D V M R H 7 u i G 5 c V H F t o x y G T Z t r Q P I Y k I w x D / R U 3 L l T c + i P u / B s z b Q W f B 0 I O 5 9 x 7 c 3 P i l F F t f P / d m Z t f W F x a r q x U V 9 f W N z b d r e 1 r L T O F S Y A l k 6 o T I 0 0 Y F S Q w 1 D D S S R V B P G a k H Y / O S 7 9 9 S 5 S m U l y Z P C U h R w N B E 4 q R s V L k 1 n q S k w G K C q R v e q m i n I y r k V v 3 v S O / B P x N G t 7 k 9 u t g h l b k v v X 6 E m e c C I M Z 0 r r b 8 F M T F k g Z i p k d 2 M s 0 S R E e o Q H p W i o Q J z o s J s u P 4 Z 5 V + j C R y h 5 h 4 E T 9 2 l E g r n X O Y 1 v J k R n q n 1 4 p / u V 1 M 5 O c h A U V a W a I w N O H k o x B I 2 G Z B O x T R b B h u S U I K 2 p 3 h X i I F M L G 5 l W G 8 P l T + D 8 J D r x T z 7 8 8 r D f P Z m l U w A 7 Y B f u g A Y 5 B E 1 y A F g g A B j m 4 B 4 / g y b l z H p x n 5 2 V a O u f M e m r g G 5 z X D 1 A f l L 8 = < / l a t e x i t > < l a t e x i t s h a 1 _ b a s e 6 4 = " n V q k N v e t 0 T l j / 7 a y O X i 1 8 h + 5 h M M = " > A A A B + 3 i c d V D L S g M x F M 3 4 r P U 1 2 q W b Y B F c D V M R H 7 u i G 5 c V H F t o x y G T Z t r Q P I Y k I w x D / R U 3 L l T c + i P u / B s z b Q W f B 0 I O 5 9 x 7 c 3 P i l F F t f P / d m Z t f W F x a r q x U V 9 f W N z b d r e 1 r L T O F S Y A l k 6 o T I 0 0 Y F S Q w 1 D D S S R V B P G a k H Y / O S 7 9 9 S 5 S m U l y Z P C U h R w N B E 4 q R s V L k 1 n q S k w G K C q R v e q m i n I y r k V v 3 v S O / B P x N G t 7 k 9 u t g h l b k v v X 6 E m e c C I M Z 0 r r b 8 F M T F k g Z i p k d 2 M s 0 S R E e o Q H p W i o Q J z o s J s u P 4 Z 5 V + j C R y h 5 h 4 E T 9 2 l E g r n X O Y 1 v J k R n q n 1 4 p / u V 1 M 5 O c h A U V a W a I w N O H k o x B I 2 G Z B O x T R b B h u S U I K 2 p 3 h X i I F M L G 5 l W G 8 P l T + D 8 J D r x T z 7 8 8 r D f P Z m l U w A 7 Y B f u g A Y 5 B E 1 y A F g g A B j m 4 B 4 / g y b l z H p x n 5 2 V a O u f M e m r g G 5 z X D 1 A f l L 8 = < / l a t e x i t > < l a t e x i t s h a 1 _ b a s e 6 4 = " n V q k N v e t 0 T l j / 7 a y O X i 1 8 h + 5 h M M = " > A A A B + 3 i c d V D ...

show abstract

Two-color quantum memory in double-Λmedia

Cited by 13 publications

References 58 publications

Memory-based optical polarization conversion in a double-$$\Lambda$$ atomic system with degenerate Zeeman states

Memory-based optical polarization conversion in a double-$$\Lambda$$ atomic system with degenerate Zeeman states

Electromagnetically induced transparency with degenerate atomic levels

Engineering of heralded narrowband color-entangled states

Contact Info

Product

Resources

About