Dynamical blockade in a bosonic Josephson junction using optimal coupling

Stefanatos, Dionisis; Paspalakis, Emmanuel

doi:10.1103/physreva.102.013716

Cited by 16 publications

(10 citation statements)

References 47 publications

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“…Note that in our recent work, [35] regarding an isolated quantum dot with the same parameters as here, we found that the major limitation for complete biexciton state preparation comes from the biexciton energy shift. Specifically, in that article we provided analytical and numerical evidence that, when using an unchirped pulse with nonnegative envelope, the corresponding quantum speed limit is 2𝜋ℏ∕|E B |, obtained for large applied field amplitude.…”

Section: Discussionsupporting

confidence: 58%

“…The former approach, used here, is a legitimate practice followed in many theoretical works in SQDs involving exciton and biexciton transitions, see, for example, refs. [23][24][25][26][35][36][37]. We also note that the phenomenological approach to the relaxation processes is the one used in coupled SQD-MNP systems as we study here, see, for example, refs.…”

Section: Discussionmentioning

confidence: 99%

“…[34] More recently, we used on-off pulses with properly selected timings, to efficiently prepare the biexciton state of the quantum dot faster than some commonly used pulse shapes. [35] Interestingly, the problem of coherent preparation and the controlled dynamics of the biexciton state in the SQD-MNP coupled nanosystem remains largely unexplored. Nughoro et al [36] analyzed the two-photon Rabi oscillations in the quantum dot, which involves the transition from the ground to the biexciton state, when the SQD is located near a spherical MNP.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient Biexciton State Preparation in a Semiconductor Quantum Dot‐Metallic Nanoparticle Hybrid Structure Using Transitionless Quantum Driving

2021

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How to efficiently prepare the biexciton state in a semiconductor quantum dot placed in the vicinity of a metal nanoparticle is investigated, with control pulses calculated using shortcuts to adiabaticity and specificaly transitionless quantum driving. The quantum dot is considered to be initialized in its ground state. It is numerically demonstrated that the proposed scheme can generate biexciton population values close to unity, for a broad span of interparticle distances and small to moderate values of the biexciton binding energy, when using short laser pulses. It is also shown that these results are robust for small errors in the nanoparticle placement. When the interparticle distance is decreased or the duration of the applied pulses is increased, the population transfer to the biexciton state is reduced. The reason is that for shorter distances the nonlinear terms in the density matrix equation, arising due to exciton-plasmon interaction, become stronger, while for longer pulses the influence of these unwanted terms is prolonged. Similarly, the fidelity is also reduced for larger values of the biexciton binding energy and longer pulses. This work may be exploited in research fields like quantum information processing and high speed nanoswitches, where a key procedure is the efficient biexciton state preparation in quantum dots.

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Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Efficient Biexciton State Preparation in a Semiconductor Quantum Dot‐Metallic Nanoparticle Hybrid Structure Using Transitionless Quantum Driving

2021

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“…a) Electronic mail: paspalak@upatras.gr b) Electronic mail: dionisis@post.harvard.edu Another important problem in the area of semiconductor quantum dots is the coherent generation of the biexciton state when starting from the ground state [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] . A simple method is to apply one laser pulse with linear polarization, implementing a two-photon transition from the ground state to the biexciton state.…”

Section: Introductionmentioning

confidence: 99%

Coherent preparation of the biexciton state in a semiconductor quantum dot coupled to a metallic nanoparticle

Paspalakis,

Smponias,

Stefanatos

2021

Preprint

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We study the potential for controlled transfer of population to the biexciton state of a semiconductor quantum dot coupled with a metal nanoparticle, under the influence of an electromagnetic pulse with hyperbolic secant shape, and derive analytical solutions of the density matrix equations, for both zero and nonzero biexciton energy shift. These solutions lead to efficient transfer to the biexciton state, for various interparticle distances, including relatively small values. In certain cases, when the distance between the two particles is small, the transfer of population is strongly modified because of the influence of surface plasmons to the excitons, and the effect is more pronounced for shorter pulses. The hybrid snanostructure that we study has been proposed for generating efficiently polarization-entangled photons, thus the successful biexciton state preparation considered here is expected to contribute in this line of research.

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“…Other recent experiments [43,44] have shown the onset of the polariton blockade [45], where antibunching is generated from the interactions between polaritons themselves. Although the amount of antibunching measured was limited by the weak polariton-polariton interaction strength, a number of methods exist for increasing it [46][47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Superpolynomial Quantum Enhancement in Polaritonic Neuromorphic Computing

Xu,

Krisnanda,

Verstraelen

et al. 2021

Preprint

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Recent proof-of-principle experiments have demonstrated the implementation of neuromorphic computing using exciton-polaritons, making use of coherent classical states [D. Ballarini et al., Nano Lett. 20, 3506 (2020)]. At the same time, it is expected that nonlinear exciton-polaritons can reach a quantum regime forming non-classical states. Here we consider theoretically the quantum nature of exciton polaritons and predict a superpolynomial quantum enhancement in image recognition tasks. This is achieved within experimentally accessible parameters.

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Dynamical blockade in a bosonic Josephson junction using optimal coupling

Cited by 16 publications

References 47 publications

Efficient Biexciton State Preparation in a Semiconductor Quantum Dot‐Metallic Nanoparticle Hybrid Structure Using Transitionless Quantum Driving

Efficient Biexciton State Preparation in a Semiconductor Quantum Dot‐Metallic Nanoparticle Hybrid Structure Using Transitionless Quantum Driving

Coherent preparation of the biexciton state in a semiconductor quantum dot coupled to a metallic nanoparticle

Superpolynomial Quantum Enhancement in Polaritonic Neuromorphic Computing

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