247 citations · 1.3k across the 49 of their papers we have counts for
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Interstellar communication network. III. Locating deep space nodes
Michael Hippke
An interstellar communication network benefits from relay nodes placed in the gravitational lenses of stars. The signal gains are of order with optimal alignment, allowing…
Searching for interstellar quantum communications
Michael Hippke
The modern search for extraterrestrial intelligence (SETI) began with the seminal publications of Cocconi & Morrison (1959) and Schwartz & Townes (1961), who proposed to search for…
Searching for a message in the angular power spectrum of the cosmic microwave background
Michael Hippke
The Creator of the universe could place a message on the most cosmic of all billboards, the Cosmic Microwave Background (CMB) sky. It was proposed by Hsu & Zee (2006) to to search…
Interstellar communication network. II. Deep space nodes with gravitational lensing
Michael Hippke
Data rates in an interstellar communication network suffer from the inverse square law due to the vast distances between the stars. To achieve high (Gbits/s) data rates, some combi…
Low-cost precursor of an interstellar mission
René Heller, Guillem Anglada-Escudé, Michael Hippke +1
The solar photon pressure provides a viable source of thrust for spacecraft in the solar system. Theoretically it could also enable interstellar missions, but an extremely small ma…
Periodic Spectral Modulations Arise from Non-random Spacing of Spectral Absorption Lines
Michael Hippke
In recent publications, Borra (2013); Borra & Trottier (2016); Borra (2017) claimed the discovery of ultra-short (s) optical pulses originating from stars and galaxies,…
Interstellar communication. XI. Short pulse duration limits of optical SETI
Michael Hippke
Previous and ongoing searches for extraterrestrial optical and infrared nanosecond laser pulses and narrow line-width continuous emissions have so far returned null results. At the…
Interstellar communication. X. The colors of optical SETI
Michael Hippke
It has recently been argued from a laser engineering point of view that there are only a few magic colors for optical SETI. These are primarily the Nd:YAG line at 1064 nm and its s…
Interstellar communication. IX. Message decontamination is impossible
Michael Hippke, John G. Learned
A complex message from space may require the use of computers to display, analyze and understand. Such a message cannot be decontaminated with certainty, and technical risks remain…
Interstellar Communication. VIII. Hard limits on the number of bits per photon
Michael Hippke
A photon can encode several bits of information based on an alphabet of its time of arrival, energy, and polarization. Heisenberg's uncertainty principle places a limit on measurin…
Interstellar communication. VI. Searching X-ray spectra for narrowband communication
Michael Hippke, Duncan H. Forgan
We have previously argued that targeted interstellar communication has a physical optimum at narrowband X-ray wavelengths nm, limited by the surface roughness of focus…
Interstellar communication. V. Introduction to photon information efficiency (in bits per photon)
Michael Hippke
How many bits of information can a single photon carry? Intuition says "one", but this is incorrect. With an alphabet based on the photon's time of arrival, energy, and polarizatio…
Interstellar communication. VII. Benchmarking inscribed matter probes
Michael Hippke, Paul Leyland, John G. Learned
We have explored the optimal frequency of interstellar photon communications and benchmarked other particles as information carriers in previous papers of this series. We now compa…
Interstellar communication. III. Optimal frequency to maximize data rate
Michael Hippke, Duncan H. Forgan
The optimal frequency for interstellar communication, using "Earth 2017" technology, was derived in papers I and II of this series (arXiv:1706.03795, arXiv:1706.05570). The framewo…
Interstellar communication. IV. Benchmarking information carriers
Michael Hippke
The search for extraterrestrial communication has mainly focused on microwave photons since the 1950s. We compare other high speed information carriers to photons, such as electron…
Photogravimagnetic assists of light sails: a mixed blessing for Breakthrough Starshot?
Duncan H. Forgan, René Heller, Michael Hippke
Upon entering a star system, light sails are subject to both gravitational forces and radiation pressure, and can use both in concert to modify their trajectory. Moreover, stars po…
Interstellar communication. I. Maximized data rate for lightweight space-probes
Michael Hippke
Recent technological advances could make interstellar travel possible, using ultra-lightweight sails pushed by lasers or solar photon pressure, at speeds of a few percent the speed…
Optimized trajectories to the nearest stars using lightweight high-velocity photon sails
René Heller, Michael Hippke, Pierre Kervella
New means of interstellar travel are now being considered by various research teams, assuming lightweight spaceships to be accelerated via either laser or solar radiation to a sign…
Deceleration of high-velocity interstellar photon sails into bound orbits at Centauri
René Heller, Michael Hippke
At a distance of about 4.22 lightyears, it would take about 100,000 years for humans to visit our closest stellar neighbor Proxima Centauri using modern chemical thrusters. New tec…