Abstract
The recent launch of the Micius quantum-enabled satellite heralds a major step forward for long-range quantum communication. Using single-photon discrete-variable quantum states, this exciting new development proves beyond any doubt that all of the quantum protocols previously deployed over limited ranges in terrestrial experiments can, in fact, be translated to global distances via the use of low-orbit satellites. In this work, we survey the imminent extension of space-based quantum communication to the continuous-variable regime - the quantum regime perhaps most closely related to classical wireless communications. The CV regime offers the potential for increased communication performance and represents the next major step forward for quantum communications and the development of the global quantum internet.
Highlights
TO CV QUANTUM SYSTEMSAny isolated physical system is associated to a Hilbert space, i.e., a complex vector space with inner product
Each PM scheme of CV-quantum key distribution (QKD) can be represented by an equivalent entanglement-based (EB) scheme [15], [80], [87], [118], [135], [136], where Alice generates a two-mode entangled state,17 with one mode being held by Alice and the other mode being transmitted through an insecure quantum channel to Bob
6) When the quantum communication phase is completed and all the incoming states have been measured by Bob, classical post-processing over a public channel is commenced by applying sifting, where Bob reveals for each Gaussian rv the specific value of u, and Alice retains aq or ap depending on the value of u
Summary
M OORE’S Law has remained valid for half-a-century! As a result, contemporary semi-conductor technology is approaching nano-scale integration. A key motivation for quantum communication of Fig. 2 is that the quantum information, mapped for example to the polarization of a photon, can be shared more securely than classical information. QKD, which is based on the laws of quantum physics, allows Alice and Bob to generate secret keys that can later be used to communicate with unconditional information-theoretic security, regardless of any future advances in computational power. CV-QKD is one of the few quantum applications, which rely on state-of-the-art communications technology, ensuring a relatively smooth transition from the classical to the ultra-secure quantum regime.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
