Genuine multipartite entanglement is crucial for quantum information and quantum technologies but quantifying it has been a long-standing challenge. Most existing measures do not meet a “genuine” requirement, making them unsuitable for many applications. Here, we present a surprising triangle measure for tripartite entanglement, and introduce the extension to four-qubit systems. We discuss potential avenues for further generalizations along this geometric path. This indicates that our work may pave the way for further advancements.
We present the transverse patterns for down conversion that are associated with signal and idler entanglement, in the form of the unique Schmidt modes for the photons. We introduce Schmidt analysis and review Schmidt modes in the simpler context of short-pulse down-conversion with frequency entanglement. For the more difficult pattern analysis, we simplify by assuming zero orbital angular momentum for the pump pulse as well as cw pump light. We provide angular momentum labels as well as Schmidt mode labels to categorize the patterns.
Proposals on detecting atomic stabilization have been suggested through possible generation of strong even-ordered harmonics or through blue shifted ATI peaks. The strength of observable signals has been the center issue of discussions. In this paper we remark on an alternative way in which stabilization process may be effectively detected. We show that in bichromatic fields the degree of ionization can be modulated by as much as 20% by changing the relative phase. In an experiment, by recording this phase modulation, one can calibrate and determine the degree of stabilization. In microwave ionization experiments reported, bichromatic field intensity has already been used as a sensitive probe in studying the so called quantum localization border.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.