Experimental observation of double coherent stimulated Raman adiabatic passages in three-level<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Λ</mml:mi></mml:math>systems in a cold atomic ensemble

Yan, Hui; Liang, Zhengtao; Huang, Wei; Zhu, Shi-Liang

doi:10.1103/physreva.90.023821

Cited by 25 publications

(26 citation statements)

References 30 publications

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“…Similar results were demonstrated in Ref. [25] where authors theoretically and experimentally realized a reverse operation for a superposition state ∆P t=0 ab = 0.5 with near-unity fidelity when the required adiabatic condition is fulfilled. Their theoretical study showed a strong oscillation during the intermediate region due to the phase difference between |d and |b 1 while fast oscillations were not clearly observed in practical experiment.…”

Section: Real Dynamics and Propertiessupporting

confidence: 87%

“…A perfect switching for the initial populations is revealed with P t m ≈ 0 for the complete evolution. Note that the whole switching time required here is only 4.5 µs, much smaller than that reported in Du's experiment (T = 2ms) [25].…”

Section: Scheme Implementationcontrasting

confidence: 54%

“…Moreover, by varying the wait time, a single-qubit geometric phase gate can be created by coherent excitation of a trapped Rydberg ion [23], even yielding complex NOON state entanglement between two Bose-Einstein condensates [24]. On the other hand, Du and coworkers experimentally implemented a double-STIRAP process realized by a single laser pulse sequence in a three-level Λ system with same transfer efficiency for both d-and b-STIRAPs, suggesting the possibility for coherent manipulation of quantum superposition states with high efficiency [25]. However, a detailed discussion for the essence of the whole switching process and its relevance to system parameters have not been presented…”

Section: Introductionmentioning

confidence: 99%

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Robust switching of superposition-states via a coherent double stimulated Raman adiabatic passage

Yan

et al. 2018

J. Opt. Soc. Am. B

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Coherent manipulation of quantum states is of crucial importance in accurate control of a quantum system. A fundamental goal is coherently transferring the population of a desired state with near-unit fidelity. For this propose, we theoretically demonstrate a novel coherent double-stimulated Raman adiabatic passage (STIRAP) in a three-level Λ-type system for realizing the switch of unequal initial preparations on two ground states. This operation uses single optical pulse sequence accomplishing both bright-STIRAP and dark-STIRAP process, in which the intermediate-level detuning and the pulse delay must be given an optimal adjustment. Besides, owing to the imperfection of double-STIRAP transition, the sensitivity of the switch fidelity with respect to the spontaneous loss from the intermediate state, to the pulse amplitude and to the population difference, are also discussed. This work suggests a simple and experimentally-feasible all-optical approach to switch the superposition quantum state, serving as one-step closer to the goal of coherent manipulation of quantum systems.

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Section: Real Dynamics and Propertiessupporting

confidence: 87%

Section: Scheme Implementationcontrasting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

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Robust switching of superposition-states via a coherent double stimulated Raman adiabatic passage

Yan

et al. 2018

J. Opt. Soc. Am. B

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“…STIRAP can coherently transfer population by adiabatically changing a dark state [11][12][13] . The same process is also possible through a bright state (b-STIRAP) 14,15 and both methods have been realized in doped solids 14,[16][17][18] , cold atoms 19 , and quantum dots 20 , to name a few. It has been implemented for coherent manipulation of states 19 in logic operations 21,22 , quantumness witness detection 23 and entanglement generation 24 .…”

Section: Introductionmentioning

confidence: 99%

Stimulated Raman adiabatic control of a nuclear spin in diamond

et al. 2017

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Coherent manipulation of nuclear spins is a highly desirable tool for both quantum metrology and quantum computation. However, most of the current techniques to control nuclear spins lack of being fast impairing their robustness against decoherence. Here, based on Stimulated Raman Adiabatic Passage, and its modification including shortcuts to adiabaticity, we present a fast protocol for the coherent manipulation of nuclear spins. Moreover, we show how to initialise a nuclear spin starting from a thermal state, and how to implement Raman control for performing Ramsey spectroscopy to measure the dynamical and geometric phases acquired by nuclear spins.

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“…Population transfer by adiabatic evolution is among the most popular methods for coherent atomic manipulation [1][2][3][4][5][6][7][8][9][10]. However, due to the requirement on adiabaticity, the manipulation is very slow.…”

Section: Introductionmentioning

confidence: 99%

Shortcuts to adiabaticity in non-Hermitian quantum systems without rotating-wave approximation

Shen

2017

Opt. Express

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Abstract:The technique of shortcuts to adiabaticity (STA) has attracted broad attention due to their possible applications in quantum information processing and quantum control. However, most studies published so far have been only focused on Hermitian systems under the rotating-wave approximation (RWA). In this paper, we propose a modified shortcuts to adiabaticity technique to realize population transfer for a non-Hermitian system without RWA. We work out an exact expression for the control function and present examples consisting of two-and three-level systems with decay to show the theory. The results suggest that the shortcuts to adiabaticity technique presented here is robust for fast passages. We also find that the decay has small effect on the population transfer in the three-level system. To shed more light on the physics behind this result, we reduce the quantum three-level system to an effective two-level one with large detunings. The shortcuts to adiabaticity technique of effective two-level system is studied. Thereby the high-fidelity population transfer can be implemented in non-Hermitian systems by our method, and it works even without RWA.

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Experimental observation of double coherent stimulated Raman adiabatic passages in three-levelΛsystems in a cold atomic ensemble

Cited by 25 publications

References 30 publications

Robust switching of superposition-states via a coherent double stimulated Raman adiabatic passage

Robust switching of superposition-states via a coherent double stimulated Raman adiabatic passage

Stimulated Raman adiabatic control of a nuclear spin in diamond

Shortcuts to adiabaticity in non-Hermitian quantum systems without rotating-wave approximation

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