On-demand generation of higher-order Fock states in quantum-dot--cavity systems

• URL: http://arxiv.org/abs/2006.14531v2
• Date: Mon, 28 Sep 2020 10:15:28 GMT
• Title: On-demand generation of higher-order Fock states in quantum-dot--cavity systems
• Authors: M. Cosacchi, J. Wiercinski, T. Seidelmann, M. Cygorek, A. Vagov, D. E. Reiter, V. M. Axt
• Abstract summary: We propose and compare protocols to generate higher-order Fock states in solid state quantum-dot--cavity systems. The protocols make use of a series of laser pulses to excite the quantum dot exciton and off-resonant pulses to control the detuning between dot and cavity.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The on-demand preparation of higher-order Fock states is of fundamental importance in quantum information sciences. We propose and compare different protocols to generate higher-order Fock states in solid state quantum-dot--cavity systems. The protocols make use of a series of laser pulses to excite the quantum dot exciton and off-resonant pulses to control the detuning between dot and cavity. Our theoretical studies include dot and cavity loss processes as well as the pure-dephasing type coupling to longitudinal acoustic phonons in a numerically complete fashion. By going beyond the two-level approximation for quantum dots, we study the impact of a finite exchange splitting, the impact of a higher energetic exciton state, and an excitation with linearly polarized laser pulses leading to detrimental occupations of the biexciton state. We predict that under realistic conditions, a protocol which keeps the cavity at resonance with the quantum dot until the desired target state is reached is able to deliver fidelities to the Fock state $| 5\rangle$ well above $40\,\%$.

Related papers

• The multimode conditional quantum Entropy Power Inequality and the squashed entanglement of the extreme multimode bosonic Gaussian channels [53.253900735220796]
  Inequality determines the minimum conditional von Neumann entropy of the output of the most general linear mixing of bosonic quantum modes. Bosonic quantum systems constitute the mathematical model for the electromagnetic radiation in the quantum regime.
  arXiv  Detail & Related papers  (2024-10-18T13:59:50Z)
• Quantum correlations enhanced in hybrid optomechanical system via phase tuning [0.0]
  This work presents a theoretical framework for enhancing quantum correlations in a hybrid double-cavity optomechanical system. We find that tuning the phase $phi$ is essential for maximizing photon-phonon entanglement.
  arXiv  Detail & Related papers  (2024-10-13T14:11:07Z)
• Thermalization and Criticality on an Analog-Digital Quantum Simulator [133.58336306417294]
  We present a quantum simulator comprising 69 superconducting qubits which supports both universal quantum gates and high-fidelity analog evolution. We observe signatures of the classical Kosterlitz-Thouless phase transition, as well as strong deviations from Kibble-Zurek scaling predictions. We digitally prepare the system in pairwise-entangled dimer states and image the transport of energy and vorticity during thermalization.
  arXiv  Detail & Related papers  (2024-05-27T17:40:39Z)
• Enhanced quantum state transfer: Circumventing quantum chaotic behavior [35.74056021340496]
  We show how to transfer few-particle quantum states in a two-dimensional quantum network. Our approach paves the way to short-distance quantum communication for connecting distributed quantum processors or registers.
  arXiv  Detail & Related papers  (2024-02-01T19:00:03Z)
• Enhanced quantum sensing mediated by a cavity in open systems [0.0]
  We simulate the dynamics of systems with $N$ = 1-20 qubits coupled to a cavity. We investigate the scaling of the uncertainty in the estimate of the qubit-cavity coupling with the number of qubits.
  arXiv  Detail & Related papers  (2023-12-08T00:41:38Z)
• Achieving the Heisenberg limit with Dicke states in noisy quantum metrology [0.0]
  We show how Dicke states can be used to surpass the standard quantum limit and achieve the Heisenberg limit in open quantum systems. The system we study has qubits symmetrically coupled to a resonator and our objective is to estimate the coupling between the qubits and the resonator. We show that when the system is to a Dicke state with an optimal excitation number one can go beyond the standard quantum limit and achieve the Heisenberg limit even for finite values of the decays on the qubit and the resonator.
  arXiv  Detail & Related papers  (2023-09-21T18:21:10Z)
• Generating entangled states from coherent states in circuit-QED [0.0]
  Entangled states are self-evidently important to a wide range of applications in quantum communication and quantum information processing. We propose an efficient and convenient two-step protocol for generating Bell states and NOON states of two microwave resonators from merely coherent states.
  arXiv  Detail & Related papers  (2022-12-29T13:00:28Z)
• Coherent control of a high-orbital hole in a semiconductor quantum dot [21.05348937863074]
  coherent manipulation of single charge carriers in quantum dots is limited mainly to their lowest orbital states. We demonstrate an all-optical method to control high-orbital states of a hole via stimulated Auger process. Our work opens new possibilities for understanding the fundamental properties of high-orbital states in quantum emitters.
  arXiv  Detail & Related papers  (2022-12-21T03:49:46Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• Entanglement catalysis for quantum states and noisy channels [41.94295877935867]
  We investigate properties of entanglement and its role for quantum communication. For transformations between bipartite pure states, we prove the existence of a universal catalyst. We further develop methods to estimate the number of singlets which can be established via a noisy quantum channel.
  arXiv  Detail & Related papers  (2022-02-10T18:36:25Z)
• Preparation of a superposition of squeezed coherent states of a cavity field via coupling to a superconducting charge qubit [0.0]
  We will discuss the issue of the generation of nonclassical states in the context of a superconducting qubit in a microcavity. The key ingredients to engineer these quantum states are a tunable gate voltage and a classical magnetic field applied to SQUID.
  arXiv  Detail & Related papers  (2020-03-20T18:06:47Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.