Topic
Atomic coherence
About: Atomic coherence is a research topic. Over the lifetime, 877 publications have been published within this topic receiving 29395 citations.
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18 Apr 2016
TL;DR: In this paper, an approach for super-resolution optical lithography which is based on the inverse of magnetic resonance imaging (MRI) is proposed, which uses atomic coherence in an ensemble of spin systems whose final state population can be optically detected.
Abstract: We propose an approach for super-resolution optical lithography which is based on the inverse of magnetic resonance imaging (MRI). The technique uses atomic coherence in an ensemble of spin systems whose final state population can be optically detected. In principle, our method is capable of producing arbitrary one and two dimensional high-resolution patterns with high contrast.
4 citations
TL;DR: In this paper, the authors proposed a scheme to generate and control atomic spin squeezing via atomic coherence induced by the strong coupling and probe fields in the ε-Lambda-type electromagnetically-induced transparency configuration in an atomic ensemble.
Abstract: We propose a scheme to generate and control atomic spin squeezing via atomic coherence induced by the strong coupling and probe fields in the \ensuremath{\Lambda}-type electromagnetically-induced-transparency configuration in an atomic ensemble. Manipulation of squeezing of the two components in the plane orthogonal to the mean atomic spin direction and generation of nearly perfect squeezing in either component can be achieved by varying the relative intensities of the coupling and probe fields. This method provides a flexible and convenient way to create and control atomic spin squeezing, which may find potential applications in high-precision atomic-physics measurement, quantum coherent control, and quantum information processing.
4 citations
TL;DR: In this paper, a Raman four-wave mixing process is used to read out light from atomic coherence which is continuously written and the generated light is continuously generated after an effective delay.
Abstract: We use a Raman four-wave mixing process to read-out light from atomic coherence which is continuously written. The light is continuously generated after an effective delay, allowing the atomic coherence to evolve during the process. Contrary to slow-light delay, which depends on the medium optical depth, here the generation delay is determined solely by the intensive properties of the system, approaching the atomic coherence lifetime at the weak driving limit. The generated light is background free. We experimentally probe these properties utilizing spatial diffusion as an 'internal clock' for the atomic evolution time.
4 citations
TL;DR: In this paper, the authors investigated the different regimes of an optically dense extended amplifier and computed both the transmitted and reflected output from this amplifier as function of the input field, the initial atomic population difference and the initial state of the atomic coherence.
4 citations
TL;DR: In this article, a time-dependent model that describes a qubit time-dependently interacting with a cavity containing finite entangled pair coherent parametric converter fields is considered, and the dynamics of some quantum phenomena, such as phase space information, quantum entanglement and squeezing, are explored by atomic Husimi function, atomic Wehrl entropy, variance, and entropy squeezing.
Abstract: We consider a time-dependent model that describes a qubit time-dependently interacting with a cavity containing finite entangled pair coherent parametric converter fields. The dynamics of some quantum phenomena, as: phase space information, quantum entanglement and squeezing, are explored by atomic Husimi function, atomic Wehrl entropy, variance, and entropy squeezing. The influences of the unitary qubit-cavity interaction, the difference between the two-mode photon numbers, the initial atomic coherence, and the time-dependent qubit location are investigated. It is found that the regularity, the amplitudes and the frequency of the quantum phenomena can be controlled by the physical parameters. For the initial atomic pure state, the qubit-cavity entanglement, the qubit phase space information, and atomic squeezing can be generated strongly compared to those of the initial atomic mixed state. The time-dependent location parameters enhance the generated quantum phenomena, and their effect can be enhanced by the parameters of the two-mode photon numbers and the initial atomic coherence.
4 citations