Generation and dynamic manipulation of frequency degenerate polarization entangled Bell states by a silicon quantum photonic circuit

Liu, Dongning; Zheng, Jingyuan; Yu, Lingjie; Feng, Xue; Liu, Fang; Cui, Kaiyu; Huang, Yidong; Zhang, Wei

doi:10.1016/j.chip.2021.100001

Cited by 7 publications

(2 citation statements)

References 41 publications

(29 reference statements)

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“…This is an extension of the generalized QBM Eq. ( 12) to multimodes that is practically used in the integrated quantum photonics for the current investigation of photonics quantum computing [23][24][25][26][27].…”

Section: Hamiltonian Is Given Bymentioning

confidence: 99%

Exact Master Equation for Quantum Brownian Motion with Generalization to Momentum-Dependent System-Environment Couplings

Huang¹,

Zhang²

2022

Preprint

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In this paper, we generalize the quantum Brownian motion to include momentum-dependent system-environment couplings. The resulting Hamiltonian is given by Htot. The conventional QBM model corresponds to the spacial case W k = V k . The generalized QBM is more complicated but the generalization is necessary. This is because the particle transition and the pair production between the system and the environment represent two very different physical processes, and usually cannot have the same coupling strengths. Thus, the conventional QBM model, which is well-defined at classical level, is hardly realized in real quantum physical world. We discuss the physical realizations of the generalized QBM in different physical systems, and derive its exact master equation for both the initial decoupled states and initial correlated states. The Hu-Paz-Zhang master equation of the conventional QBM model is reproduced as a special case. We find that the renormalized Brownian particle Hamiltonian after traced out all the environmental states induced naturally a momentumdependent potential, which also shows the necessity of including the momentum-dependent coupling in the QBM Hamiltonian. In the Hu-Paz-Zhang master equation, such a renormalized potential is misplaced so that the correct renormalization Hamiltonian has not been found. With the exact master equation for both the initial decoupled and and initial correlated states, the issues about the initial jolt which is a long-stand problem in the Hu-Paz-Zhang master equation is also re-examined. We find that the so-called "initial jolt", which has been thought to be an artificial effect due to the use of the initial decoupled system-environment states, has nothing do to with the initial decoupled state. The new exact master equation for the generalized QBM also has the potential applications to photonics quantum computing.

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Section: Hamiltonian Is Given Bymentioning

confidence: 99%

Exact Master Equation for Quantum Brownian Motion with Generalization to Momentum-Dependent System-Environment Couplings

Huang¹,

Zhang²

2022

Preprint

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“…Such a memory-enhanced single-photon source, based on the broadband room-temperature quantum memory, suggests a promising way for establishing large-scale quantum memory-enabled network at ambient condition.High generation rate of photon source is highly related to the accessible scale of quantum systems and plays a key role in advances stepping to large-scale quantum information processing, enabling quantum communication 1-3 , quantum computing 4-6 , and quantum metrology 7,8 beyond the proof-of-principle demonstrations. Up to date, photon sources have been realized in many different systems [9][10][11][12][13] and numerous schemes are proposed to improve their performance to approach the ideal one [14][15][16] . Despite great progresses in the development of photon source, scaling up the quantum information processing remains exponentially hard due to the transmission loss in channel and probabilistic nature of quantum operation.…”

mentioning

confidence: 99%

Enhancing photon generation rate with broadband room-temperature quantum memory

Zhang

Pang

Dou

et al. 2022

Sci Rep

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Photons with high generation rate is one of the essential resources for quantum communication, quantum computing and quantum metrology. Due to the naturally memory-built-in feature, the memory-based photon source is a promising route towards large-scale quantum information processing. However, such photon sources are mostly implemented in extremely low-temperature ensembles or isolated systems, limiting its physical scalability. Here we realize a single-photon source based on a far off-resonance Duan-Lukin-Cirac-Zoller quantum memory at broadband and room-temperature regime. By harnessing high-speed feedback control and repeat-until-success write process, the photon generation rate obtains considerable enhancement up to tenfold. Such a memory-enhanced single-photon source, based on the broadband room-temperature quantum memory, suggests a promising way for establishing large-scale quantum memory-enabled network at ambient condition.

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Hybrid superconducting photonic-phononic chip for quantum information processing

Wang²,

Sun³

et al. 2022

Chip

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Generation and dynamic manipulation of frequency degenerate polarization entangled Bell states by a silicon quantum photonic circuit

Cited by 7 publications

References 41 publications

Exact Master Equation for Quantum Brownian Motion with Generalization to Momentum-Dependent System-Environment Couplings

Exact Master Equation for Quantum Brownian Motion with Generalization to Momentum-Dependent System-Environment Couplings

Enhancing photon generation rate with broadband room-temperature quantum memory

Hybrid superconducting photonic-phononic chip for quantum information processing

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