Generation of entanglement between qubits in a one-dimensional harmonic oscillator

Owen, E. T.; Dean, M. C.; Barnes, C. H. W.

doi:10.1103/physreva.85.022319

Cited by 14 publications

(13 citation statements)

References 38 publications

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“…Our gate will be an extension of collision experiments between different spin species [63] with pairs of atoms at a time. Launching exactly two atoms towards each other in 1D should be feasible with microtrap arrays [1,2,64] or in atom chips [39,40] and is also a key assumption in many works [11,41,42,43]. For example, our gates can be made with the technique of Ref.…”

Section: Implementation Via Flying Qubitsmentioning

confidence: 99%

Quantum gates between distant qubits via spin-independent scattering

Banchi

Compagno

Korepin

et al. 2017

Quantum

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We show how the spin independent scattering of two initially distant qubits, say, in distinct traps or in remote sites of a lattice, can be used to implement an entangling quantum gate between them. The scattering takes place under 1D confinement for which we consider two different scenarios: a 1D wave-guide and a tight-binding lattice. We consider models with contactlike interaction between two fermionic or two bosonic particles. A qubit is encoded in two distinct spins (or other internal) states of each particle. Our scheme enables the implementation of a gate between two qubits which are initially too far to interact directly, and provides an alternative to photonic mediators for the scaling of quantum computers. Fundamentally, an interesting feature is that "identical particles" (e.g., two atoms of the same species) and the 1D confinement, are both necessary for the action of the gate. Finally, we discuss the feasibility of our scheme, the degree of control required to initialize the wavepackets momenta, and show how the quality of the gate is affected by momentum distributions and initial distance. In a lattice, the control of quasi-momenta is naturally provided by few local edge impurities in the lattice potential.

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Section: Implementation Via Flying Qubitsmentioning

confidence: 99%

Quantum gates between distant qubits via spin-independent scattering

Banchi

Compagno

Korepin

et al. 2017

Quantum

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“…It should be emphasized that the Bose-Hubbard model we propose is general enough to describe various physical systems in which the phenomenon of quantum entanglement can be observed. For instance, entangled states can appear in Bose-Einstein condensates [39][40][41], quantum dots [42,43], trapped ions [44], atoms inside an optical cavity [45,46] and in many others [47][48][49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the entanglement generation via randomly perturbed series of external pulses in a nonlinear Bose–Hubbard dimer

et al. 2019

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We discuss a model of a short Bose-Hubbard dimer involving two anharmonic quantum oscillators mutually coupled with the use of the linear interaction and additionally driven by a series of ultra-short external pulses. We show that under some conditions the system behaves as a two-qubit one, and contrary to its continuously driven counterpart can be a source of maximally entangled states (MES). We discuss the cases when the system is excited only in one mode and in both ones, and additionally when the cross-Kerr-type interaction is present or omitted. We show that the generation of maximally (or almost maximally) entangled states depends on the time of free evolution of oscillators and hence, the proper steer

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“…The generation of entanglement in various quantum systems is one of the fundamental areas of interest in quantum information theory. Entanglement can be observed in various physical systems such as Bose-Einstein condensates [26,27], cavity QED [28], quantum dots [29,30], trapped ions [31], and many others [32][33][34][35][36][37]. The research related to the production of entanglement in open systems is of particular importance.…”

Section: Introductionmentioning

confidence: 99%

The Entanglement Generation in P T -Symmetric Optical Quadrimer System

Kalaga

2019

Symmetry

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We discuss a model consisting of four single-mode cavities with gain and loss energy in the first and last modes. The cavities are coupled to each other by linear interaction and form a chain. Such a system is described by a non-Hermitian Hamiltonian which, under some conditions, becomes P T -symmetric. We identify the phase-transition point and study the possibility of generation bipartite entanglement (entanglement between all pairs of cavities) in the system.

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Generation of entanglement between qubits in a one-dimensional harmonic oscillator

Cited by 14 publications

References 38 publications

Quantum gates between distant qubits via spin-independent scattering

Quantum gates between distant qubits via spin-independent scattering

Enhancement of the entanglement generation via randomly perturbed series of external pulses in a nonlinear Bose–Hubbard dimer

The Entanglement Generation in P T -Symmetric Optical Quadrimer System

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