Quantum 6, 653 (2022).

https://doi.org/10.22331/q-2022-02-16-653

A multiple access channel describes a situation in which multiple senders are trying to forward messages to a single receiver using some physical medium. In this paper we consider scenarios in which this medium consists of just a single classical or quantum particle. In the quantum case, the particle can be prepared in a superposition state thereby allowing for a richer family of encoding strategies. To make the comparison between quantum and classical channels precise, we introduce an operational framework in which all possible encoding strategies consume no more than a single particle. We apply this framework to an $N$-port interferometer experiment in which each party controls a path the particle can traverse. When used for the purpose of communication, this setup embodies a multiple access channel (MAC) built with a single particle. We provide a full characterization of the $N$-party classical MACs that can be built from a single particle, and we show that every non-classical particle can generate a MAC outside the classical set. To further distinguish the capabilities of a single classical and quantum particle, we relax the locality constraint and allow for joint encodings by subsets of ${1lt Kle N}$ parties. This generates a richer family of classical MACs whose polytope dimension we compute. We identify a "generalized fingerprinting inequality'' as a valid facet for this polytope, and we verify that a quantum particle distributed among $N$ separated parties can violate this inequality even when ${K=N-1}$. Connections are drawn between the single-particle framework and multi-level coherence theory. We show that every pure state with $K$-level coherence can be detected in a semi-device independent manner, with the only assumption being conservation of particle number.

Deal is the second one topping $1 billion since November and sets the stage for what could be another record-breaking year for investment in the cybersecurity industry.

There's a remote code execution hole in Adobe e-commerce products - and cybercrooks are already exploiting it.

The overall trend for the Cardano (ADA) price is bearish, and the long-coming descending bolsters a similar opinion. After last week’s relief rally failed to overcome the $1.2 resistance, the ADA price turned down and tumbled 15% to the $1 support. Can bulls make a meaningful recovery, or will they lose the $1 mark? Key

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BTC’s price action is looking grim, but traders hope that a bounce off the $42,000 support will complete a bullish technical analysis pattern and trigger a rally in Bitcoin and altcoins.

The recent recovery in Ethereum price marked a high of $3280. This rally breached the combined resistance $3000 psychological level and a long coming descending trendline. However, the Ethereum price reverts to test these levels for sufficient demand.  Key technical points The 20-day DMA acted as strong support for ETH The daily-RSI struggles to sustain

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The Gala Games (GALA) price doubled during last week’s recovery rally. The buyers breached two significant resistance of $0.23 and $0.3 before reaching the monthly resistance of $0.37. The bears defended this resistance with vigor and rejected the altcoin to the immediate support of $0.3. Can buyers continue this rally or the sellers would take

The post GALA Price Analysis: Gala Games Price May Break $0.42 If This Pattern Formation Is Successful appeared first on CoinGape.

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The post Floki Inu Price Analysis: Planning To Buy Floki Inu? FLOKI Price To Retest $0.00003 Support appeared first on CoinGape.

Blockchain ecosystem and cryptocurrency infrastructure provider Binance has invested US$200 million into global media company Forbes and Magnum Opus Acquisition, a publicly traded special purpose acquisition company. Forbes and Magnum

The post Binance Invests US$200 Million in Forbes Ahead of SPAC Merger appeared first on Fintech Singapore.

Reports indicate that the world’s largest cryptocurrency exchange by trade volume, Binance, has announced the crypto company has committed to investing $200 million into the American business magazine Forbes. The digital currency company Binance confirmed the $200 million stake into Forbes on the social media platform Twitter. Binance Pledges $200 Million to Forbes Binance has […]

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