Voltage-controlled entanglement and quantum-information transfer between spatially separated quantum-dot molecules

Lü, Xin-You; Wu, Jing; Zheng, Lili; Zhi-Ming, Zhan

doi:10.1103/physreva.83.042302

Cited by 45 publications

(17 citation statements)

References 87 publications

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“…The cavity optomechanical (COM) systems, which have already been proven to have strong coupling between the micromechanical resonator and optical cavity field [12,[14][15][16], are now generally designed for mechanics-based sensing [17], macroscopic quantum superpositions [18], optical mass sensing [19], and quantum information transfer [20,21]. As a milestone in COM dynamics, optomechanically induced transparency (OMIT) was realized [22,23], and one can easily observe the slow light by such a phenomenon [24,25].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical response of cavity optomechanical system with second-order coupling

2015

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We theoretically investigate the optical response of a cavity optomechanical system via the nonlinear coupling between optical and mechanical resonators, which is expected to be strong. Our results show that the nonlinear coupling will significantly influence the optical bistability. We compare the transmission spectrum of linear coupling with that of nonlinear coupling up to the second order and observe a shift between the transmission peak, which indicates the energy-level modification induced by the nonlinear coupling. Based on this nonlinear optomechanical phenomenon, we propose a theoretical method to determine the mechanical frequency and the second-order coupling constant. This means will eliminate the influence caused by the first-order coupling, which enables much easier detection of second-order coupling constant.

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Section: Introductionmentioning

confidence: 99%

Nonlinear optical response of cavity optomechanical system with second-order coupling

2015

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“…the dissipative rates are substantially smaller than the rates of the photon exchange between N qubits, MR and waveguide modes. The Hamiltonian of such a quantum network can be represented as follows (hereafter dynamics analysis of the quantum network consisted of two remote qubits (quantum information was encoded into orbital states of a double QD) placed in MRs, which, in turn, were connected to a single-mode waveguide was carried out in [33]. The simulation results indicated the possibility of high fidelity of the photon transport from one qubit to another, if the system dissipation was low.…”

Section: A Brief Review Of Quantum Network Models and Control Algoritmentioning

confidence: 98%

Quantum diamond chip under network optical control

Tsukanov¹,

Kateev²,

Orlikovsky³

et al. 2014

SPIE Proceedings

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We propose a structure and elements of the diamond chip fabrication technology, which could be used for an experimental study of spectral and dynamic properties of a quantum register prototype formed by a chain of microresonators (disks and rings) containing NV-centers. Making use of the parameters of NV-systems today exist, we simulate the dissipative population dynamics of two NV-centers located in different parts of the two-qubit register. As follows from our numerical results, high probability of controlled indirect qubit interaction via photon transfer from one center to another can be already achieved at the current diamond photonics technology level. The calculated operating parameters of the resonators and measuring structure (grating) are in good agreement with those that have been used in devices created by leading world science groups. The fabrication technique of lithographic mask is discussed and its roughness is estimated.

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“…Here, we introduce the phase differences δϕ A(B) = The changes in the QD energies and in the interdot tunneling can be produced by variation of the QD confining potential with the help of the bias voltage applied across the DQD [5,19,20,29]. We assume such voltage-driven pulses to have square form with Gaussian wings characterized by the envelope function…”

Section: The Modelmentioning

confidence: 99%

“…Our study is aimed at overcoming the challenges inherent to the laser-driven DQD charge qubit by full replacement of the laser with the cavity field and the gate voltage as it was already done theoretically in Ref. [29] for the DQD exciton qubits. In view of recent experimental advances in the design and fabrication of these systems, one is able to achieve the desired terahertz frequency domain by an appropriate choice of the geometry and material of the cavity.…”

Section: Introductionmentioning

confidence: 98%

Photon-assisted conditionality for double-dot charge qubits in a single-mode cavity

Tsukanov

2012

Phys. Rev. A

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The problems of the design, control, and interaction of the single-electron double-dot charge qubits coherently coupled to the optical cavity mode are studied theoretically. A way to overcome the challenges concerned with the use of classical laser pulses for a qubit state engineering is described, replacing the lasers by a quantized photon field in a semiconductor cavity and a gate voltage. Using this strategy, a simple and efficient scheme is proposed for the creation of highly entangled multiqubit states like the nine-qubit Shor states.

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Voltage-controlled entanglement and quantum-information transfer between spatially separated quantum-dot molecules

Cited by 45 publications

References 87 publications

Nonlinear optical response of cavity optomechanical system with second-order coupling

Nonlinear optical response of cavity optomechanical system with second-order coupling

Quantum diamond chip under network optical control

Photon-assisted conditionality for double-dot charge qubits in a single-mode cavity

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