Quantum non-Gaussianity and secure quantum communication
نویسندگان
چکیده
منابع مشابه
Quantum Secure Direct Communication with Quantum Memory.
Quantum communication provides an absolute security advantage, and it has been widely developed over the past 30 years. As an important branch of quantum communication, quantum secure direct communication (QSDC) promotes high security and instantaneousness in communication through directly transmitting messages over a quantum channel. The full implementation of a quantum protocol always require...
متن کاملQuantum non-Gaussianity witnesses in phase space
Catherine Hughes,1 Marco G. Genoni,2,1 Tommaso Tufarelli,1 Matteo G. A. Paris,3 and M. S. Kim1,4 1QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom 2Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom 3Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy 4School of Computational S...
متن کاملQuantifying non-Gaussianity of quantum-state correlation
We consider how to quantify non-Gaussianity for the correlation of a bipartite quantum state by using various measures such as relative entropy and geometric distances. We first show that an intuitive approach, i.e., subtracting the correlation of a reference Gaussian state from that of a target non-Gaussian state, fails to yield a non-negative measure with monotonicity under local Gaussian cha...
متن کاملRevisiting controlled quantum secure direct communication using a non-symmetric quantum channel with quantum superdense coding
Recently Xia and Song [Phys. Lett. A (In press)] have proposed a controlled quantum secure direct communication (CQSDC) protocol. They claimed that in their protocol only with the help of the controller Charlie, the receiver Alice can successfully extract the secret message from the sender Bob. In this letter, first we will show that within their protocol the controller Charlie’s role can be ex...
متن کاملSecure communication via quantum illumination
In the quantum illumination (QI) protocol for secure communication, Alice prepares entangled signal and idler beams via spontaneous parametric downconversion. She sends the signal beam to Bob, while retaining the idler. Bob imposes message modulation on the beam he receives from Alice, amplifies it, and sends it back to her. Alice then decodes Bob’s information by making a joint quantum measure...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: npj Quantum Information
سال: 2019
ISSN: 2056-6387
DOI: 10.1038/s41534-019-0164-9