![]() The emission of one photon is followed within a few nanoseconds by the emission of the second, so if you see one, you know the other should be around somewhere. Instead, they decay by emitting two photons, passing through an intermediate state with a short lifetime. In these experiments, they put a bunch of calcium atoms into a highly-excited energy level where the electron is forbidden to return to the ground state by emitting a single photon. The historical way of doing this is to use a "cascade" transition, as was done by Alain Aspect and colleagues in a classic set of experiments back in the early 1980s, and by Freedman and Clauser somewhat earlier. And most of the ways people have to entangle photons just give you an entangled state right from the get-go. Which turns out to be easier than you might think from pop-physics treatments that emphasize its weirdness, and that's an excellent excuse for a blog post.ġ) Entanglement From Birth: The vast majority of quantum entanglement experiments to date use photons as the entangled particles, for the simple reason that it's really easy to entangle two photons. And while I have certainly written a lot about entanglement here (The first page of Google results for "orzel forbes entanglement" gives one, two, three, four, five, six, seven, eight, nine links, and that's not all of them), it's also true that I haven't gone into that much detail about the creation of entanglement. I figured if my colleague was confused about that, then a bunch of other people probably are, too. We had a nice conversation about it as we walked, and I filed that away as a topic for a blog post. As we were walking toward the center of campus from the parking lot, he asked the title question of this post: "How do you create quantum entanglement?" He noted that he'd read a lot of pop-science articles talking about the weird aspects of the physics that happens once you have two entangled particles, but they tended to skip lightly over the details of how you get them entangled in the first place. ( STO - Klingon War missions: " Welcome to Earth Spacedock", " Explore the Flotilla")įrom that year onward, the IKS QeHpu' represented its class in the Klingon shipyards interface.One morning last week, I arrived on campus at the same time as a colleague from the History department who studies the history of physics. The potential energy entangler was also equipped on Deleth- and Reliant-class advanced light cruisers. ( STO - Klingon Sector mission: " The Hunt is On") Weapons and ship equipment like deflector shields, deflector, impulse engines and matter/anti-matter warp core were rated Mark X. An additional three disruptor beam arrays and one photon torpedo launcher were fitted to the aft. The disruptor dual beam bank, photon torpedo launcher, disruptor dual cannons and a disruptor beam array were equipped on the fore. Vessels of the class were equipped with a cloaking device and, from 2410 onward, with the new potential energy entangler, a weapon that siphoned power from an enemy ship's systems and used it to fuel the light battlecruiser's own impulse engine power. ( STO website: Advanced Light Cruiser Bundle Stats!) The Defense Force's contribution was rated a tier 6 light battlecruiser, striking the balance between the power of a battlecruiser and remaining nimble. ( STO - Klingon War mission: " Welcome to Earth Spacedock") The existing Federation Miranda-class was a similarly sized vessel with a length of 230 meters, and a crew complement of 200. In the year 2410, the Khitomer Alliance powers cooperated in launching advanced light cruiser classes, based on the Klingon QeHpu' and a new iteration of Starfleet's 23rd century Reliant-class. She eventually rose to become commanding officer of the Klingon flagship IKS Bortasqu' in 2409. Around that time, Koren, daughter of Grilka, attained command of the IKS Orantho by killing her captain in a duel. The QeHpu' class had entered service by the 2390s decade.
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