High-efficiency backward four-wave mixing by quantum interference

Liu, Ziyu; Xiao, Jian-Ting; Lin, Jia-Kang; Wu, Junjie; Juo, Jz-Yuan; Chin-Yao, Cheng,; Chen, Yong-Fan

doi:10.1038/s41598-017-16062-5

Cited by 22 publications

(11 citation statements)

References 47 publications

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“…(25) and ( 26)]. This system is also known as an open-loop FWM system and can be used as an efficient frequency converter [40][41][42][43][44].…”

Section: Hadamard Gatesmentioning

confidence: 99%

Controlling Frequency-Domain Hong-Ou-Mandel Interference via Electromagnetically Induced Transparency

Liu¹,

Jiun-Shiuan²,

Chin-Yao³

et al. 2023

Preprint

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Hong-Ou-Mandel (HOM) interference is a compelling quantum phenomenon that demonstrates the nonclassical nature of single photons. Herein, we investigate an electromagnetically induced transparency-based double-Λ four-wave mixing system from the perspective of quantized light fields. The system can be used to realize efficient HOM interference in the frequency domain. By using the reduced density operator theory, we demonstrate that, although the double-Λ medium does not exhibit phase-dependent properties for the closed-loop case of two incident single photons, frequency-domain HOM two-photon interference occurs. For experimentally achievable optical depth conditions, our theory indicates that this double-Λ scheme can perform high-fidelity Hadamard gate operations on frequency-encoded single-photon qubits, and thereby generate HOM two-photon NOON states with a fidelity greater than 0.99. Furthermore, we demonstrate that this scheme can be used to realize arbitrary single-qubit gates and two-qubit SWAP gates by simply controlling the laser detuning and phase, exhibiting its multifunctional properties and providing a new route to scalable optical quantum computing.

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“…(25) and ( 26)]. This system is also known as an open-loop FWM system and can be used as an efficient frequency converter [40][41][42][43][44].…”

Section: Hadamard Gatesmentioning

confidence: 99%

Controlling Frequency-Domain Hong-Ou-Mandel Interference via Electromagnetically Induced Transparency

Liu¹,

Jiun-Shiuan²,

Chin-Yao³

et al. 2023

Preprint

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“…The suppression and enhancement of four-wave-mixing (FWM) process in electromagnetically induced transparency (EIT) windows [1][2][3][4][5][6][7][8] can be implemented in many multi-level systems, such as ladder-type, [2,9,10] Y-type, [8] and double lambda-type [4][5][6][11][12][13] level configurations. In a ladder-type system with hyperfine ground states, the magnitude of FWM signal is found to be dependent on the transition route, and dominantly related to the residual two-photon coherence according to the degree of optical pumping to the other ground state.…”

Section: Introductionmentioning

confidence: 99%

“…[8] Recently, in a backward double-lambda system, the conversion efficient in cold rubidium atoms was observed to be 63%, and the conversion efficient was predicted to be 96% by using a medium with a large optical depth. [13] The control of FWM process can be achieved by changing several parameters of the fields applied to the system, e.g., the detuning and the strengths, [8,14] the relative phases, [15] and the pulse dynamics. [16] This control of FWM process can be applied to the quantum entanglement, [17] the fabrication of scalable multimode quantum resources, [18] and the enhancement of bright-seeded SU (1,1) interferometer.…”

Section: Introductionmentioning

confidence: 99%

Dynamic and inner-dressing control of four-wave mixing in periodically-driven atomic system*

Li¹,

Zhang²,

Zhang

2019

Chinese Phys. B

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Four-wave-mixing (FWM) process is examined by using density matrix formalism in a periodically-driven atomic medium. Numerical result shows that FWM signals can be controlled by selecting different dynamic parameters of the probe field and strengths of the inner-dressing fields. It is also shown that the controllable FWM process is dominantly influenced by the evolution of atomic population difference and two-photon coherence. This dynamic and inner-dressing control of FWM is probably used for optimizing the optical nonlinear process and information processing.

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“…While current work towards CPC uses nonlinear waveguides and is limited by the efficiency of the quantum process [22], atomic systems can create FWM [23] at near unitary efficiencies, and are an excellent candidate for highly efficient CPC. Additionally it has been shown that with these same FWM systems, it is possible to achieve large XPM at the low light level without requiring cavities, storage or Rydberg levels through a double-Λ system [24].…”

Section: Introductionmentioning

confidence: 99%

Conditional $π$-Phase Shift of Single-Photon-Level Pulses at Room Temperature

Shahrokhshahi,

Sagona-Stophel,

Jordaan

et al. 2018

Preprint

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The development of useful photon-photon interactions can trigger numerous breakthroughs in quantum information science, however this has remained a considerable challenge spanning several decades. Here we demonstrate the first room-temperature implementation of large phase shifts (≈ π) on a single-photon level probe pulse (1.5us) triggered by a simultaneously-propagating few-photonlevel signal field. This process is mediated by Rb 87 vapor in a double-Λ atomic configuration. We use homodyne tomography to obtain the quadrature statistics of the phase-shifted quantum fields and perform maximum-likelihood estimation to reconstruct their quantum state in the Fock state basis. For the probe field, we have observed input-output fidelities higher than 90% for phase-shifted output states, and high overlap (over 90%) with a theoretically perfect coherent state. Our noise-free, four-wave-mixing-mediated photon-photon interface is a key milestone towards developing quantum logic and nondemolition photon detection using schemes such as coherent photon conversion.

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High-efficiency backward four-wave mixing by quantum interference

Cited by 22 publications

References 47 publications

Controlling Frequency-Domain Hong-Ou-Mandel Interference via Electromagnetically Induced Transparency

Controlling Frequency-Domain Hong-Ou-Mandel Interference via Electromagnetically Induced Transparency

Dynamic and inner-dressing control of four-wave mixing in periodically-driven atomic system*

Conditional $π$-Phase Shift of Single-Photon-Level Pulses at Room Temperature

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