Optical Memory and Neural Networks

, Volume 27, Issue 3, pp 209–217 | Cite as

Communication with Quantum Limited Subspace

  • Francis T. S. YuEmail author


One important aspect of our universe is that one cannot get something from nothing; there is always a price to pay. In this article we show that every bit of information is limited by a quantum unit. Since we are communicating within a temporal subspace, this unit can be equivalently described as a quantum limited subspace (QLS), as imposed by the Heisenberg Principle. We show that communication can be exploited within and outside the QLS. The size of a QLS is determined by carrier signal bandwidth; that is narrower the bandwidth the larger the size of the QLS. By manipulating the size of a QLS, more efficient information transmission strategies can be developed. Examples for inside and outside QLS communication are given. Extension to relativistic communication has also demonstrated. We remark that, a new era of communication is anticipated to immerge and it will change our way in communicating, observation and computing, we used to use, forever!


Quantum limited communication Quantum unit Quantum entanglement Temporal universe Heisenberg uncertainty principle Entropy 


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Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  1. 1.Pennsylvania State UniversityPennsylvaniaUSA

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