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Quantum Control and its Application Center

Quantum Control and its Application Center

 

1. Introduction on research areas

Our study center focuses on basic and applied basic research in the interaction between light and matter, quantum computing and its realization, quantum metrology and image, quantum open systems, quantum control, mesoscopic physics, atomic molecule and cluster physics. These subjects are fundamental and important in physics and related fields.

 
(1) Classical and quantum control of light with man-made materials

In recent years, there has been a great deal of interest in the study of optical properties for some man-made materials such as photonic crystal, metamaterials and plasmonic nanostructure. These materials provide an opportunity to confine and control the propagation of electromagnetic waves. It can have profound implications for quantum optics, high-efficiency lasers, optoelectronic devices, and other areas of applications. Over the years we have been committed to this research area. In the future, our center mainly focuses on integrated optics and photoelectric conversion based on these mam-made nanostructures.
(2) Quantum computing and its realization

In the past two decades, great attention has been paid to quantum computation that uses quantum effects to perform computations. It is generally considered that quantum computation will be more powerful than the classical one. Although many proposes have been given, the physical implementation of quantum computer is not yet available. Our center mainly focuses on optical quantum computing and its realization. We will explore whether or not some quantum algorithms can be implemented in optical systems.


(3) Quantum metrology and image

The study of making high resolution and highly sensitive measurements of physical parameters using quantum theory has attracted considerable attentions recently. We mainly focus on how environment influences the measurements and how to use quantum technique fighting against environmental noise to improve the measurement accuracy.

 

(4) Quantum feedback control

Since decoherence is the main obstacle for realizing quantum information tasks, fighting against it has become a major challenge. Quantum feedback control is an effective scheme, which is based on feeding back the measurement results to alter the future dynamics of quantum systems. And it can be used to improve the stability and robustness of the system, and it plays a fundamental role in the development of new quantum technologies. We mainly focus on weak measurement based feedback control of the dynamics of open quantum system.

 

(5) Quantum open system theory

In reality, no quantum system is completely isolated from its surrounding environment, which may cause deoherence in the quantum system. Quantum open system theory describes the dynamics of an open quantum system influenced by its environment. We mainly study dynamics of quantum systems when they interact with the Markovian and non-Markovian reservoirs. We also concern how to apply the theory in biology systems such as photosynthetic complexes and chemical compass.

 

(6) Chiroptical phenomena in nanocomposites composed of metallic nanostructures and chiral molecules

Resonant excitation of surface plasmon resonance by external optical field allows metallic nanoparticles to concentrate electromagnetic field in subwavelength volumes, resulting in enormous field enhancement especially at the so-called hotspots. The intense local field enhancement promotes the light–matter interactions for the molecules located in the near field of metallic nanostructures, leading to plasmon enhanced Raman/Fluorescence/ circular dichroism (CD) spectroscopies. Our works focus on the plasmon-enhanced CD effect for small chiral molecules. Furthermore, we develop novel chiral plasmonic nanostructures and exploit plasmon-based chiroptical techniques for a variety of bioscience and biomedicine applications.

 

(7) Chirality of Soft nanofibers
Chiral nanofibers formed by biopolymer or low molecular-mass gelators may have important applications in chiral separation, drug delivery, etc. Our works focus on two aspects: (a) Understanding the nucleation-and-growth mechanism of nanofibers formation, particularly the key factors governing the nano/microstructure of chiral fibers; (b)  The chirality induction and amplification phenomena under external physical stimuli (e.g. chiral light, magnetic field, vortex flow).

(8) Mesoscopic Physics
We mainly focus on the electronic transport, heat (thermal) transport, and shot noise of different systems or electronic devices including quantum dots systems (devices), superconductor Josephson Junctions system (devices), graphene system, topological insulator, and black phosphorus. Also we carry on the study of the growth mechanism of thin films, as well as the physics and application of low-dimensional materials/devices.

 

2. Recent some research progresses in our center

(1) Researches on quantum imaging


 

 

(2) Researches on information process for classical and quantum optics


(3) Researches on molecule chirality

 



Release date:2015-10-16