It's a hedge ...

 

The mixed time directions of the photon could help physicists probe inside black holes.
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Seems you can go forward and backward in time if you have serious tech and extensive knowledge in leveraging quantum mechanics to do the following ... 

By splitting a photon, or packet of light, using a special optical crystal, two independent teams of physicists have achieved what they describe as a 'quantum time flip', in which a photon exists in both forward and backward time states.  

To whit

The effect results from the convergence of two strange principles of quantum mechanics, the counterintuitive rules that govern the behavior of the very small. The first principle, quantum superposition, enables minuscule particles to exist in many different states, or different versions of themselves, at once, until they are observed. The second — charge, parity and time-reversal (CPT) symmetry — states that any system containing particles will obey the same physical laws even if the particles' charges, spatial coordinates and movements through time are flipped as if through a mirror.

It's a hedge against entropy thanks to superposition and the manipulation of the very small. 

The second law of thermodynamics states that the entropy of a system, a rough analogue of its disorder, must increase. Known as the "arrow of time," entropy is one of the few quantities in physics that sets time to go in a particular direction.

This tendency for disorder to grow in the universe explains why it's easier to mix ingredients than to separate them. It's also through this growing disorder that entropy is wedded so intimately to our sense of time. A famous scene in Kurt Vonnegut's novel "Slaughterhouse-Five" demonstrates how differently entropy makes one direction of time look to the other by playing World War II in reverse: Bullets are sucked from wounded men; fires are shrunk, gathered into bombs, stacked in neat rows, and separated into composite minerals; and the reversed arrow of time undoes the disorder and devastation of war.

However, as entropy is primarily a statistical concept, it doesn’t apply to single subatomic particles. In fact, in every particle interaction scientists have observed so far — including the up to 1 billion interactions per second that take place inside the world's largest atom smasher, the Large Hadron Collider — CPT symmetry is upheld. So particles seeming to move forward in time are indistinguishable from those in a mirrored system of antiparticles moving backward in time. (Antimatter was created with matter during the Big Bang and doesn't actually move backward in time; it just behaves as if it is following an opposite arrow of time to normal matter.)