• Publications
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Advances in Quantum Cryptography
TLDR
This review begins by reviewing protocols of quantum key distribution based on discrete variable systems, and considers aspects of device independence, satellite challenges, and high rate protocols based on continuous variable systems.
Wireless optical communications via diversity reception and optical preamplification
TLDR
The effects of atmospheric turbulence, background light, source extinction ratio, amplified spontaneous emission, and receiver thermal noise are studied in the context of a semiclassical photon-counting approach and results are presented using a conditional Gaussian approximation method.
Quantum repeaters with imperfect memories: Cost and scalability
TLDR
It is shown that, for any given distance $L$, the polynomial scaling of rate can only be achieved if quantum memories with coherence times on the order of $L/c$ or longer, with $c$ being the speed of light in the channel, are available.
Statistical fluctuation analysis for measurement-device-independent quantum key distribution
Measurement-device-independent quantum key distribution with a finite number of decoy states is analyzed
Wireless optical communications via diversity reception and optical preamplification
  • M. Razavi, J. Shapiro
  • Physics, Environmental Science
    IEEE International Conference on Communications…
  • 11 May 2003
TLDR
Numerical results, obtained using a conditional Gaussian approximation, quantify the link margin improvement due to optical preamplification and diversity reception and investigate the particular diversity techniques that are investigated.
An Introduction to Quantum Communications Networks
This book fills a gap between experts and non-experts in the field by providing readers with the basic tools to understand the latest developments in quantum communications and its future directions.
A trusted node–free eight-user metropolitan quantum communication network
TLDR
This work presents a fully connected quantum communication network on a city-wide scale without active switching or trusted nodes, and demonstrates simultaneous and secure connections between all 28 pairings of eight users.
Improved key-rate bounds for practical decoy-state quantum-key-distribution systems
TLDR
A tighter bound is developed for the decoy-state method, which yields a smaller failure probability and results in a higher key rate and increases the maximum distance over which secure key exchange is possible.
Continuous-time cross-phase modulation and quantum computation
The weak nonlinear Kerr interaction between single photons and intense laser fields has been recently proposed as a basis for distributed optics-based solutions to few-qubit applications in quantum
Coherence measures for heralded single-photon sources
We show that the Mobius function mu(n) is strongly asymptotically orthogonal to any polynomial nilsequence n -> F(g(n)L). Here, G is a simply-connected nilpotent Lie group with a discrete and
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