Ultimate capacity of a linear time-invariant bosonic channel

Bardhan, Bhaskar Roy; Shapiro, Jeffrey H.

doi:10.1103/physreva.93.032342

Cited by 15 publications

(14 citation statements)

References 25 publications

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“…Heterodyne detection is described by a random-parameter channel E het with complex-valued Gaussian noise, specified by Y = √ η(α + S) + Z het (10) with complex-valued circulaly-symmetric Gaussian random parameter S ∼ N C (0, 1 2 N S ) and noise [25]. Similarly, we use DPC with α ∼ N C (0, 1 2 N A ) and U = α + t 0 S, achieving the capacity…”

Section: Resultsmentioning

confidence: 99%

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Bosonic Dirty Paper Coding

Pereg

2021

2021 IEEE International Symposium on Information Theory (ISIT)

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Section: Resultsmentioning

confidence: 99%

“…Optical communication forms the backbone of the Internet [1,2,3]. The bosonic channel is a simple quantummechanical model for optical communication over free space or optical fibers [4,5].…”

Section: Introductionmentioning

confidence: 99%

Bosonic Dirty Paper Coding

Pereg

2021

2021 IEEE International Symposium on Information Theory (ISIT)

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“…Based on rigorous formulations of the classical information capacity on a quantum channel [40]- [42], the capacity of the lossy noise-less bosonic channel n th = 0 was proven by Giovannetti et al in 2004 [43], and the proof was extended to the lossy and noisy channel in 2014 [44]- [46], completing the proof of Gordon's capacity formula. Additional important findings from these proofs include the additivity of the Gordon capacity (i.e., the fact that the capacity of multiple parallel channels equals the sum of their individual capacities, which is not universally true in quantum communications, where channel capacities can be super-additive [47]) and its achievability by only encoding over coherent states, without the need for squeezing or entanglement [44], [48].…”

Section: The Gordon Capacitymentioning

confidence: 99%

Would Scaling to Extreme Ultraviolet or Soft X-Ray Communications Resolve the Capacity Crunch?

Winzer

2018

J. Lightwave Technol.

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Optical networks are facing fundamental capacity scalability problems owing to Shannon limits in silica fiber, frequently summarized as the "optical networks capacity crunch." We explore the possibility of scaling communication capacities through the use of significantly higher carrier frequencies, such as the extreme ultraviolet or the soft x-ray spectral region, in analogy to the 3-7 orders of magnitude increase in carrier frequencies when optical fiber replaced microwave transmission technologies in the late 1970s. We find that only very limited capacity gains on the order of 10 may be achieved relative to the 1550-nm telecommunications band without fundamentally increasing a system's received energy per bit, its relative bandwidth, or its degree of spatial parallelism. Conversely, we predict the required reduction of waveguide losses that would be needed to make higher carrier frequencies a viable proposition from an energy efficiency point of view. Our analyses include the use of as of yet unexplored quantum communication techniques, whose required energy per bit we find to be lowerbounded by kT/log 2 e at any carrier frequency, which may have implications beyond the communications applications discussed in this paper.

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“…Here, the connection between the QFED and RTE makes the essential initial step towards converting RTE into a scalable and all-inclusive optical model with interference modulated model parameters and transparent physical interpretation. It also allows extending many quantum models 19 – 22 to account for interference.…”

Section: Introductionmentioning

confidence: 99%

Interference-exact radiative transfer equation

Partanen

Häyrynen

Oksanen

2017

Sci Rep

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The Purcell effect, i.e., the modification of the spontaneous emission rate by optical interference, profoundly affects the light-matter coupling in optical resonators. Fully describing the optical absorption, emission, and interference of light hence conventionally requires combining the full Maxwell’s equations with stochastic or quantum optical source terms accounting for the quantum nature of light. We show that both the nonlocal wave and local particle features associated with interference and emission of propagating fields in stratified geometries can be fully captured by local damping and scattering coefficients derived from the recently introduced quantized fluctuational electrodynamics (QFED) framework. In addition to describing the nonlocal optical interference processes as local directionally resolved effects, this allows reformulating the well known and widely used radiative transfer equation (RTE) as a physically transparent interference-exact model that extends the useful range of computationally efficient and quantum optically accurate interference-aware optical models from simple structures to full optical devices.

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Ultimate capacity of a linear time-invariant bosonic channel

Cited by 15 publications

References 25 publications

Bosonic Dirty Paper Coding

Bosonic Dirty Paper Coding

Would Scaling to Extreme Ultraviolet or Soft X-Ray Communications Resolve the Capacity Crunch?

Interference-exact radiative transfer equation

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