Tag: gravity
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Scientists remeasured gravitational constant
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Alphabet Spins Out Quantum Company
Source of fast radio bursts surprises astronomers
Discovery suggests ancient stars can collapse to create magnetars
The post Source of fast radio bursts surprises astronomers appeared first on Physics World.
Bitcoin Is A Monetary System Of Integrity
Sierra Space Signs Memorandum of Understanding with Mitsubishi Heavy Industries
The MOU agreement outlines plans for Sierra Space and MHI to collaborate on a wide range of technologies regarding the development of Orbital Reef, a commercially developed, owned and operated space station to be built in low Earth orbit (LEO) by investors Sierra Space and Blue Origin.
Sierra Space and MHI have commenced work on incorporating MHI expertise in the development of Orbital Reef, bringing in technologies and expertise from MHI's years of experience with the International Space Station (ISS) program.
"At Sierra Space we are building a platform in space to benefit life on Earth," said Tom Vice, Sierra Space CEO. "We are proud to formalize a long-standing relationship with MHI and look forward to leveraging its considerable technological expertise, as we continue building Orbital Reef and the next generation of space transportation."
"MHI is very excited to collaborate with Sierra Space and use MHI's technologies and experience earned over years to contribute to the development of Orbital Reef, the program led by Sierra Space, Blue Origin and their international partners," said Tomoe Nishigaya, Vice President and Senior General Manager of Space Systems at MHI. "We look forward to further collaboration with Sierra Space as to how MHI's technologies, products and services may provide better experience for users and customers of the space station. Additionally, MHI plans to cooperate with JAXA and other aerospace companies in Japan, leveraging strong relationships built through participation to the ISS program."
About Sierra Space
Sierra Space products and programs are working towards a more accessible space economy. The company is rapidly advancing toward the launch of the world's only winged commercial spaceplane, the Dream Chaser. As the next generation of space transportation, the Dream Chaser will perform cargo supply and return missions for NASA, set to begin in late 2022, delivering up to 12,000 pounds of cargo to the International Space Station (ISS) at a time. The return journey will carry critical data, generated by ISS researcher experiments, enabling earth-bound scientists to benefit from much faster access to these unique results. Dream Chaser is a reusable spaceplane, uniquely capable of a smooth 1.5 low-g re-entry for crew and cargo transportation with the ability to land on existing commercial runways worldwide.
Sierra Space is the developer of the Large Integrated Flexible Environment (LIFE) Habitat, a modular, three-story commercial habitation and science platform. The unique structure will provide opportunities for multiple businesses including manufacturing, pharmaceuticals, and other sectors, to optimize zero gravity benefits. The LIFE Habitat will be able to be deployed in low-Earth orbit, on the lunar surface, or lunar orbit, and as a transport vehicle to Mars. Both Dream Chaser and LIFE Habitat will launch using conventional rocket propulsion systems.
The Dream Chaser spaceplane and LIFE platform are central components of the joint partnership Orbital Reef commercial space station and mixed-use business park being developed in partnership with Blue Origin.
About MHI Group
Mitsubishi Heavy Industries (MHI) Group is one of the world's leading industrial groups, spanning energy, logistics & infrastructure, industrial machinery, aerospace and defense. MHI Group combines cutting-edge technology with deep experience to deliver innovative, integrated solutions that help to realize a carbon neutral world, improve the quality of life and ensure a safer world. For more information, please visit www.mhi.com or follow our insights and stories on spectra.mhi.com.
Copyright 2022 JCN Newswire. All rights reserved. www.jcnnewswire.comSierra Space announced that the companies have jointly signed a new Memorandum of Understanding (MOU).
Bitcoin, Tectonic Shifts In The Financial System And Oil
A no-go theorem for superpositions of causal orders
Quantum 6, 663 (2022).
https://doi.org/10.22331/q-2022-03-01-663The causal order of events need not be fixed: whether a bus arrives before or after another at a certain stop can depend on other variables – like traffic. Coherent quantum control of causal order is possible too and is a useful resource for several tasks. However, quantum control implies that a controlling system carries the which-order information – if the control is traced out, the order of events remains in a probabilistic mixture. Can the order of two events be in a pure superposition, uncorrelated with any other system? Here we show that this is not possible for a broad class of processes: a pure superposition of any pair of Markovian, unitary processes with equal local dimensions and different causal orders is not a valid process, namely it results in non-normalised probabilities when probed with certain operations. The result imposes constraints on novel resources for quantum information processing and on possible processes in a theory of quantum gravity.