Working with physicist Edward Teller, Ulam solved one major problem encountered in work on the fusion bomb by suggesting that compression was essential to explosion and that shock waves from a fission bomb could produce the compression needed.
Paggawa gamit ang pisisista Edward Teller, Ulam malulutas ng isang malaking problema encountered sa trabaho sa pagsasanib ng bomba suggesting na kompresyon ay kailangan-kailangan sa pagsabog at na shock waves mula sa isang fission bomba ay maaaring magkaanak ang pagpiga kinakailangan.