Chip Scale Quantum Technologies

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A:Physics".

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 1380

Special Issue Editor

Beijing Academy of Quantum Information Sciences, Beijing 100193, China
Interests: Josephson junction; superconducting qubit; superconducting quantum computing

Special Issue Information

Dear Colleagues,

Quantum technologies are the frontier of current physics and information science. Thanks to the basic principles of quantum mechanics, such as quantum entanglement and quantum state superposition, fields such as quantum computing, quantum communication and quantum precision measurement will have a profound impact on the future development of science and technology. In the past 20 years, quantum information technology has developed rapidly. In the field of quantum computing, quantum supremacy has been demonstrated; that is, for specific problems, the speed of a quantum computer exceeds that of a supercomputer. As the carrier of quantum information processing, the quantum chip is one of the most important features in the development of quantum technology. Accordingly, this Special Issue seeks to showcase research papers, communications and review articles that focus on the preparation and measurement of different types of quantum chips. This includes superconducting quantum chips, quantum dot, ion trap, cold atom and photon chips, as well as the generation, transmission, storage, gate operation and reading of quantum states on the chip. It is hoped that this Special Issue can have a positive impact on the research of quantum chips and promote the progress of quantum technology.

We look forward to receiving your submissions.

Dr. Haifeng Yu
Guest Editor

Manuscript Submission Information

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Keywords

  • quantum chip
  • quantum computing
  • quantum communication
  • quantum measurement
  • solid-state quantum chip
  • optical quantum chip
  • quantum bit

Published Papers (1 paper)

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Research

13 pages, 2324 KiB  
Article
Phase-Controlled Tunable Unconventional Photon Blockade in a Single-Atom-Cavity System
by Hong Li, Ming Liu, Feng Yang, Siqi Zhang and Shengping Ruan
Micromachines 2023, 14(11), 2123; https://doi.org/10.3390/mi14112123 - 19 Nov 2023
Viewed by 1060
Abstract
In the past few years, cavity optomechanical systems have received extensive attention and research and have achieved rapid development both theoretically and experimentally. The systems play an important role in many fields, such as quantum information processing, optomechanical storage, high-precision measurement, macroscopic entanglement, [...] Read more.
In the past few years, cavity optomechanical systems have received extensive attention and research and have achieved rapid development both theoretically and experimentally. The systems play an important role in many fields, such as quantum information processing, optomechanical storage, high-precision measurement, macroscopic entanglement, ultrasensitive sensors and so on. Photon manipulation has always been one of the key tasks in quantum information science and technology. Photon blockade is an important way to realize single photon sources and plays an important role in the field of quantum information. Due to the nonlinear coupling of the optical force system, the energy level is not harmonic, resulting in a photon blockade effect. In this paper, we study the phase-controlled tunable unconventional photon blockade in a single-atom-cavity system, and the second-order nonlinear crystals are attached to the cavity. The cavity interacts with squeezed light, which results in a nonlinear process. The system is driven by a complex pulsed laser, and the strength of the coherent driving contains the phase. We want to study the effect of squeezed light and phase. We use the second-order correlation function to numerically and theoretically analyze the photon blockade effect. We show that quantum interference of two-photon excitation between three different transition pathways can cause a photon blockade effect. When there is no squeezed light, the interference pathways becomes two, but there are still photon blockade effects. We explore the influence of the tunable phase and second-order nonlinear strength on the photon blockade effect. We calculate the correlation function and compare the numerical results with the analytical results under certain parameters and find that the agreement is better. Full article
(This article belongs to the Special Issue Chip Scale Quantum Technologies)
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