Getting something out of nothing
نویسنده
چکیده
We study quantum key distribution with standard weak coherent states and show, rather counter-intuitively, that the detection events originated from vacua can contribute to secure key generation rate, over and above the best prior art result. Our proof is based on a communication complexity/quantum memory argument.
منابع مشابه
Kant and the table of nothing
At the very end of the Transcendental Analytic Kant argues that the two concepts something/possible and nothing/impossible, which constitute the starting point of traditional ontology, are not in fact the highest concepts. Instead, these two opposed concepts stand under a higher concept, namely the concept of an object in general, and result from that concept’s division. Both the concept of so...
متن کاملGetting Something for Nothing: Noise Attenuation in an Aliased World*
One of the most effective ways to deal with source-generated coherent noise, which often contaminates seismic reflection records, is to record the data in the field using spatial sampling small enough to avoid aliasing the highest frequency components of the lowest-velocity surface wave energy. The offending noise can then be effectively estimated and removed by application of various processin...
متن کاملWiddowson and Classroom Discourse
Drawing on recent developments in linguistic description and applied linguistics, it can be concluded that learning a language necessitates getting to know something and being able to do something with that knowledge: competence, and performance. Structural approach to language description attaches importance to the former; communicative approach to the latter. Appropriate classroom discours...
متن کاملSommers' proof that something exists
1. Something is possible. 2. Whatever is not a categorially possible thing is not a possible thing. 3. Suppose there were nothing (i.e., nothing exists). 4. By definition D-things are categorially impossible if and only if nothing is D and nothing is D. 5. For any D, nothing is D and nothing is D. (by 3) 6. For any D, D-things are categorially impossible, (by 4 and 5) 7. For any D, D-things are...
متن کاملSomething for nothing?
Official statistics are an important component of the mass of publicly available data. Although well used by policy makers, planners and academic researchers, engagement with businesses is not fully developed. Both corporate and citizen users can benefit more from using these free resources. Considerable efforts are being made to engage with users, for example via the recently launched www.stat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Quantum Information & Computation
دوره 5 شماره
صفحات -
تاریخ انتشار 2005