Parallel Photonic Quantum Computation Assisted by Quantum Dots in One-Side Optical Microcavities

Luo, Ming‐Xing; Wang, Xiaojun

doi:10.1038/srep05732

Cited by 34 publications

(46 citation statements)

References 51 publications

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“…Assisted by single photon or single spin gate operations, these gates can be converted to the popular quantum gates in different systems, e.g., controlled-NOT (CNOT) or hyper CNOT gates, Toffoli gates, and Fredkin gates which can be useful for scalable quantum computing73747576. Similar quantum gates, i.e., the controlled phase-flip gates were proposed by Duan and Kimble60 in atom-cavity systems have been experimentally demonstrated recently4950.…”

Section: Resultsmentioning

confidence: 94%

Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

2017

Sci Rep

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The future Internet is very likely the mixture of all-optical Internet with low power consumption and quantum Internet with absolute security guaranteed by the laws of quantum mechanics. Photons would be used for processing, routing and com-munication of data, and photonic transistor using a weak light to control a strong light is the core component as an optical analogue to the electronic transistor that forms the basis of modern electronics. In sharp contrast to previous all-optical tran-sistors which are all based on optical nonlinearities, here I introduce a novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit, i.e., single-photon transistor based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity. A single-photon or classical optical pulse as the gate sets the spin state via projective measurement and controls the polarization of a strong light to open/block the photonic channel. Due to the duality as quantum gate for quantum information processing and transistor for optical information processing, this versatile spin-cavity quantum transistor provides a solid-state platform ideal for all-optical networks and quantum networks.

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Section: Resultsmentioning

confidence: 94%

Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

2017

Sci Rep

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“…With these interactions, several hybrid quantum logic gates may be achieved [48][49][50][51][52][53][54][55].…”

Section: Photon-atom Interaction In Optical Microcavitiesmentioning

confidence: 99%

Generations of N-atom GHZ state and $$2^n$$ 2 n -atom W state assisted by quantum dots in optical microcavities

Luo

Deng

et al. 2015

Quantum Inf Process

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Multipartite entangled state plays a crucial role in quantum applications. We propose theoretical schemes to generate entanglements among several trapped atoms with the help of quantum dots in single-side optical microcavities. In the first scheme, a basic architecture will be built to produce arbitrary N -atom GHZ state by using only one auxiliary photon. Moreover, using a photon state with multiple modes, we can realize 2 n -atom W state. All these schemes are insensitive to the variation of the atom-photon coupling rates and are also right for remotely trapped atoms by using the photonic transmissions, local quantum operations, and classical channel. Simulations show that our schemes are faithful and available with present physical techniques.

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“…Conversely, if the excess electron spin is in the state | ↓ , after reflection the pulse |R gets a phase shift of θ h while the pulse |L gets a phase shift of θ 0 . Generally, for initial electron spin in the state α 2 | ↑ + β 2 | ↓ , the optical interaction leads to the following transformation [32,40,50,52]:…”

Section: Cavity-qed Systemmentioning

confidence: 99%

“…By adjusting the frequencies c → 0, the phase difference θ 0 − θ f = π is followed for the strong coupling g κ, γ . Thus the dynamics of the interaction between photon and electron spin in a microcavity coupled system [40,52] is described as follows:…”

Section: Cavity-qed Systemmentioning

confidence: 99%

Universal remote quantum computation assisted by the cavity input–output process

Luo

Wang

2015

Proc. R. Soc. A.

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Quantum computing may provide potential superiority to solve some difficult problems. We propose a scheme for scalable remote quantum computation based on an interface between the photon and the spin of an electron confined in a quantum dot embedded in a microcavity. By successively interacting auxiliary photon pulses with spins charged in optical cavities, a prototypical quantum controlled-controlled flip gate (Toffoli gate) is achieved on a remote three-spin system using only one Einstein-Podolsky-Rosen entanglement, and local operations and classical communication. Our proposed model is shown to be robust to practical noise and experimental imperfections in current cavity-quantum electrodynamics techniques.

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Parallel Photonic Quantum Computation Assisted by Quantum Dots in One-Side Optical Microcavities

Cited by 34 publications

References 51 publications

Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

Generations of N-atom GHZ state and $$2^n$$ 2 n -atom W state assisted by quantum dots in optical microcavities

Universal remote quantum computation assisted by the cavity input–output process

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