Je découvre, mais apparemment c’est déjà dépassé…
Les micro-ondes, c’étaient en mai 2013, en février 2014, on est passé au laser.
High-Speed Stock Traders Turn to Laser Beams - WSJ
(11/02/14, #paywall mais accessible par gg)
As high-speed stock traders push to trade ever faster, their newest move involves harnessing a technology that U.S. military jets use to communicate as they soar across the sky: lasers.
In March, a small Chicago communications company plans to switch on an array of laser devices linking the New York Stock Exchange’s data center in Mahwah, N.J., with the Nasdaq Stock Market’s data center in another New Jersey community, Carteret.
The lasers, perched atop high-rise apartment buildings, towers and office complexes along the 35-mile stretch between the communities, are the first phase of a grid intended to link nearly all U.S. stock exchanges this way, zipping market data and rapid-fire trades.
It is the latest salvo in the “race to zero,” traders’ term for their efforts to whittle away the difference between the speed their orders travel at and the speed of light. Zero, the point at which that difference would disappear, has become a kind of holy grail to computerized traders, for whom nanoseconds—billionths of a second—can spell the difference between profit and loss in their algorithm-driven trades.
In recent years, so-called high-frequency trading firms, which account for about half of U.S. stock trading, have adopted first custom-built fiber-optic cables, then microwave and later millimeter-wave transmissions. Networks built on all three technologies operate today, tying together exchanges around the U.S. Internationally, fiber-optic cables laid across the oceans link America’s markets with Europe’s and Asia’s.
En tirant le fil de celui ci du 1/05/13
Lasers, microwave deployed in high-speed trading arms race | Reuters
Laser beams and microwave dishes are the latest weapons in an arms race to shave milliseconds off dealing times in the shadowy world of high-speed, computerized financial trading.
Traders, who make money by exploiting tiny, lightning-fast price changes on exchanges, are now targeting Europe and Asia after skirmishing in the United States.
The first microwave connections between London and Frankfurt have been launched, cutting the time to send a trade by about 40 percent compared with optic fiber cables.
When to consider opting for microwave over laser?
– Areas suffering from severe fog and rain
– Moving buildings
– Pole mounting fixtures
– Line of sight distance more than 2km
Btw, there is not laser networks yet, microwaves are far from dead. ▻https://twitter.com/sniperinmahwah/status/515426483075305473
I want like to make it clear that the map [du premier volet] is a web of possibilities.
HFT in my backyard | Interlude
Alexandre Laumonier continue son enquête.
et rameute :
I was finishing this short post when I received a tip: Jump Trading may work on the Houtem tower tomorrow in the morning, Saturday 27 Sept., 2014. I can’t be there, but I have a message for readers who may live near Houtem: go there, and take a camera. Parti III will be online next Monday. Thank you for reading me.
ça parle aussi de pirates et notamment du bouquin d’Adrian Johns : ▻http://www.zones-sensibles.org/livres/adrian-johns-la-mort-dun-pirate
Actualité > Le premier maser fonctionnant à température ambiante
Historiquement, les masers ont précédé les lasers. Pourtant, ils n’ont jamais connu les développements de leurs cousins devenus des outils de la vie quotidienne. Cela va peut-être changer car des chercheurs britanniques viennent de trouver le moyen d’obtenir un effet maser à…
Source : Futura-Sciences
#Maser #laser #revue_Nature #température_ambiante #Microwave_Amplification_by_Stimulated_Emission_of_Radiation #saphir #National_Physical_Laboratory #Townes #maser_hydrogène #ramsey #p-terphenyl #pentacène #horloge_atomique #tumeur #scanner #radiotélescope #intelligence_extraterrestre #Oxborrow #Seti #polymère #maser_à_température_ambiante #Gravity_Probe_A