It looks nice. But I'd remove 2 poisons to 2 time pillars. Faster quanta generation,faster game.
I didn't get the point of pandemonium. Looks like you've tried combine all creature controls in one card. But,I wouldn't choose them.
So,I didn't like 3 cards,2 poisons and a pandemonium. Like I said before,I'd remove that poisons and add 2 time pillars. I'd add Fog Shield too,if you get early,can really be useful. Specially,against Counter-Rushers in Bronze League.
For me,have too many weaknesses beside too many strenghts. So,I can't decide that this is good or bad ? It worth using,but I want winning percent with other stats. Please,test it in 50 games. Or give me the Testing Mission,let me I test it in my modded version. Okay ?
I don't know if I could test it with so much time, since I'm trying to save money to make a semi-upgraded version of it, it will depend on how much free time I can have, but if you want to run some tests, you can go ahead, there is no need for my permission, feel free to do all the modifications you want and post the results. I put a v1.1 on main page, if you want to look at it.
I explained here (slightly modified version) why I'm strongly against pillars in this deck:
About quantum, it is short indeed. But I can explain why I made it like this: the game forces you to give it at least a card with zero cost or it mulligans one time: so you should likely get a nova or a pendulum at the start. If you have at least two sources, you're gonna launch the combo scorpion-momentum (assuming you've/you drew them) in round 3 at worst (2 if you have two novas). If you have a pendulum, it produces gravity-time-gravity (plus 2 times by the mark) and by round 4 you can launch the combo without even having drawn a nova (you can draw it in the meantime hopefully). If you only have a nova, you're a pillar/nova short from launching the combo (let's pray to draw it asap, you have a 30% to draw a nova or a pillar next round).
Now if we put a time pillar and you're unlucky enough to just get a time pillar, you're two cards short from launching the combo, not one, because you need two gravity quanta.
I know that like this seems there is really few quanta, but beside launching the combo and playing sundial, there isn't much else you need your quanta for.
About pandemonium, as someone else already pointed out, it's a gamble. You can either totally reverse a match with it by killing tons of enemy creatures, and get a parallel universe to boast your side, or having nothing happened. All the other cards are pretty solid options for the deck strategy, and I wanted to put in at least a "crazy card".
Some stats on starting hand, tested on 1000 runs with a simulator (v1.1):
Hands without quanta generation: 11 (1.10% of all games)
Chances to have a Nova/Momentum/Scorpion/Sundial in the opening hand: 81.875% each
Chances to have a pendulum: 44.80%
Chances to have a Pandemonium/Fog Shield/Stiletto: 21.75% each