Gates for one-way quantum computation based on Einstein-Podolsky-Rosen entanglement

Hao, Shuhong; Deng, Xiaowei; Su, Xiaolong; Jia, Xiaojun; Xie, Changde; Peng, Kunchi

doi:10.1103/physreva.89.032311

Cited by 13 publications

(20 citation statements)

References 25 publications

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“…2. Since, in fact, the rotation operation based on CV teleportation is a logical gate in CV quantum computation 21 22 23 24 25 26 27 28 29 and thus it can be integrated in a gate sequence to simulate a complex quantum dynamics.…”

Section: Resultsmentioning

confidence: 99%

“…Although the continuous variable (CV) quantum information and quantum computation (QC) based on applying quadrature amplitude and phase of quantized optical mode (qu-mode) to be quantum variables have been extensively explored 21 22 23 24 25 26 27 28 29 , QS scheme utilizing qu-mode and logical operations in CVQC to mimic the dynamics of the other quantum systems has not been implemented before. Very recently, a QS scheme of quantum field theory using continuous variables is proposed 30 .…”

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confidence: 99%

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Continuous variable quantum optical simulation for time evolution of quantum harmonic oscillators

Deng

Hao

Guo

et al. 2016

Sci Rep

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Quantum simulation enables one to mimic the evolution of other quantum systems using a controllable quantum system. Quantum harmonic oscillator (QHO) is one of the most important model systems in quantum physics. To observe the transient dynamics of a QHO with high oscillation frequency directly is difficult. We experimentally simulate the transient behaviors of QHO in an open system during time evolution with an optical mode and a logical operation system of continuous variable quantum computation. The time evolution of an atomic ensemble in the collective spontaneous emission is analytically simulated by mapping the atomic ensemble onto a QHO. The measured fidelity, which is used for quantifying the quality of the simulation, is higher than its classical limit. The presented simulation scheme provides a new tool for studying the dynamic behaviors of QHO.The simulation for dynamic behaviors of a quantum system in general is difficult with any classical configurations. In 1982, R. Feynman envisaged a quantum simulator, which should be built of quantum mechanical elements, and thus it can naturally evolve according to quantum mechanics laws 1 . By using quantum simulation (QS), we can simulate the dynamic evolution of other quantum system with a controllable quantum system 2-5 . In recent years the study on QS has been growing rapidly since the development of quantum information science has prepared enough technologies to implement the manipulation of quantum systems and realize QS. Moreover, many potential applications of QS in variety of scientific fields are a strong motivation to push it progressing. Sizable theoretical proposals on QS have been proposed in the past decade 5 . In the experimental investigations the ultra-cold quantum gases 6 , trapped ions 7,8 , photonic system 9,10 , super-conducting circuits 11 , nuclear magnetic resonance (NMR) 12-16 , nitrogen-vacancy centers 17 , and so on, have been used as the controllable quantum systems to implement QS. Some experiments on simulating the dynamic processes in the condensed-matter, chemical, biological and frustrated systems have also been demonstrated 5,18-20 . In the achieved QS experiments, the used quantum variables are discrete variables (DV) with finite dimensions. Usually, high fidelity can be obtained in the DVQS system, such as trapped ions 7 , photonic 10 , and NMR 13-15 systems.Although the continuous variable (CV) quantum information and quantum computation (QC) based on applying quadrature amplitude and phase of quantized optical mode (qu-mode) to be quantum variables have been extensively explored [21][22][23][24][25][26][27][28][29] , QS scheme utilizing qu-mode and logical operations in CVQC to mimic the dynamics of the other quantum systems has not been implemented before. Very recently, a QS scheme of quantum field theory using continuous variables is proposed 30 .In physics the dynamics of numerous systems is governed by the harmonic oscillator equations, thus the study for dynamic behaviors of harmonic oscillators has general signif...

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Continuous variable quantum optical simulation for time evolution of quantum harmonic oscillators

Deng

Hao

Guo

et al. 2016

Sci Rep

Self Cite

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“…To pursue the goal of high performance squeezing gate, two offline protocols were developed and proof‐of‐principle demonstrated by tailoring the auxiliary resource states. [ 13–15 ] Among them, a recent realization of heralded squeezing gate exploiting an ancillary squeezed state, [ 16,17 ] reported the best performance so far, better than measurement‐based feedforward operation. [ 13–15 ] But implementing the probabilistic filter results in a dramatic reduction of success probabilities.…”

Section: Introductionmentioning

confidence: 99%

“…[ 13–15 ] Among them, a recent realization of heralded squeezing gate exploiting an ancillary squeezed state, [ 16,17 ] reported the best performance so far, better than measurement‐based feedforward operation. [ 13–15 ] But implementing the probabilistic filter results in a dramatic reduction of success probabilities. Furthermore, for a specific experimental setup, the higher the target squeezing is, the lower success probabilities will be as a consequence of the narrower post‐selection filter window.…”

Section: Introductionmentioning

confidence: 99%

Deterministic and Universal Quantum Squeezing Gate with a Teleportation‐Like Protocol

Sun

Wang

Tian

et al. 2021

Laser & Photonics Reviews

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Squeezing transformation as an essential component of quantum information processing, gives rise to the possibility to perform various tasks such as distributed quantum computation and the quantum‐logic gate. However, the reported squeezing gate with best performance so far is realized with low success probability, while the performance of the deterministic ones is currently circumscribed by the limited squeezing degree of the nonclassical ancilla. To address this issue, a new scheme of deterministic and universal quantum squeezing gate with the property of nonlocal operation owing to the teleportation‐like protocol is developed and demonstrated. A high‐fidelity squeezing operation, even when the level of target squeezing being up to 10 dB, is demonstrated where a squeezed state with nonclassical noise reduction of 6.5 dB is directly observed. Moreover, a high‐fidelity complex operation including a Fourier transformation and a phase squeezing gate are performed, exploring the potential of implementing the complex task of quantum information processing with the presented functional unit. The method can be applied to distributed quantum processor, the creation of exotic nonclassical states, and quantum error correction.

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“…[14][15][16]. Moreover, a large variety of protocols on a series of one-way logic gates have been proposed and implemented, including singlequbit, two-qubit, and multi-qubit logic gates, e.g., the Toffoli gate and the CARRY gate [2,[17][18][19][20][21][22][23][24]. Moreover, there have been a number of experiments generating cluster states, and constructing one-way quantum logic gates, performed in optical systems [12,13,22,[25][26][27][28][29][30][31], trapped ions [32], and nuclear magnetic resonance (NMR) systems [33], and very recently, superconducting circuits [34,35].…”

Section: Introductionmentioning

confidence: 99%

Deterministic one-way logic gates on a cloud quantum computer

Yang,

Baishya,

et al. 2021

Preprint

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One-way quantum computing is a promising candidate for fault-tolerant quantum computing. Here, we propose new protocols to realize a deterministic one-way CNOT gate and one-way Xrotations on quantum-computing platforms. By applying a delayed-choice scheme, we overcome a limit of most currently available quantum computers, which are unable to implement further operations on measured qubits or operations conditioned on measurement results from other qubits. Moreover, we decrease the error rate of the one-way logic gates, compared to the original protocol using local operations and classical communication (LOCC). In addition, we apply our deterministic one-way CNOT gate in the Deutsch-Jozsa algorithm to show the feasibility of our proposal. We demonstrate all these one-way gates and algorithms by running experiments on the cloud quantumcomputing platform IBM Quantum Experience.

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Gates for one-way quantum computation based on Einstein-Podolsky-Rosen entanglement

Cited by 13 publications

References 25 publications

Continuous variable quantum optical simulation for time evolution of quantum harmonic oscillators

Continuous variable quantum optical simulation for time evolution of quantum harmonic oscillators

Deterministic and Universal Quantum Squeezing Gate with a Teleportation‐Like Protocol

Deterministic one-way logic gates on a cloud quantum computer

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