Light can be in two places at once (see famous double slit experiment) and travel every which way and sideways.
Light slowed
Light goes backwards
FTL at NASA
use FTL cabling

Do you know what the consequences of meeting yourself in another dimension are? Take no chances. Cloak.
Negative refraction
Invisibility Shield

Quantum level physics is not even understood by those theorising. Brain enhancement required. Welcome to the Borg, smart Biology etc. All coming soon.
"I don't like that they're not calculating anything. I don't like that they don't check their ideas. I don't like that for anything that disagrees with an experiment, they cook up an explanation—a fix-up to say, 'Well, it still might be true.' Richard Feynman

Preparing a vacuum ahead of you into which to materialise, needs to be preceded by a force field. However even empty space is full of gravity fields, dark matter, matter and anti-matter collisions and vibrating strings, branes and . . . Force field ON.

with programmable matter In case of cloaking device failure, blend with your environment.

Initially communication and autonomous AI bots will be projected into other realms. First they need a bit more AI

Storing data in black holes and partial computing in other dimensions will provide adequate computing to start with.

. . . and off we go. Bring the whole hive

The CPA removes litter bugs
Use new materials, AI energy fields and materials such as SEAGel (A type of biodegradable Aerogel) and Positronium
Liquid glass All ozmonaut suits to be sprayed