Did the scientist actually reverse the time?

Did the scientist actually reverse the time?

These headlines (below pic) are killing the internet, but is this true, did we really made some kind of time machine or somehow we reversed time? 

These headlines are killing the internet, but is this true, did we really made some kind of timeThese all start with a research paper titled “Arrow of time and its reversal on the IBM quantum computer.” 

In this article, the author claims that they performed an experiment with the help of IBM quantum computing that opens the path of research towards investigating time reversal and the backward time flow.

They claim to defy the second law of thermodynamics, let's understand this law a little bit first.

(In simple terms) Entropy is disorderness that always increases with time for example - tress always grows big, u clean ur room, arrange your books everything and after some times dirt gets on it, positions are changed so the order is gone so entropy has increased. Entropy always goes in a single direction i.e. forward (disorderness increases with time) this is called arrow of time, as time moves forward disorderness increases.

But what if we will be able to move an object from more complex state to simpler state or disordered state to ordered state for example - what if trees start getting smaller and change itself from a tree (more complex object) to a seed (relatively simpler object) giving land water from its roots, (it will be like watching a video in backward direction). This process can be called as Reversing Time.

I highly recommend you to watch this 1 min video - Relation between Entropy and Time

Ok now, what exactly the author of the paper, from the Moscow Institute of Physics and Technology, Argonne National Laboratory in Illinois did?

Their team published in the journal Scientific Reports involved transforming a ‘qubit’ (like bits of data, a ‘qubit’ is the basic unit of quantum information) from a more complicated state to a simpler one, changing the quantum state back in time, against the thermodynamic arrow of time principle. Time travel and time machine enthusiasts, however, must have to wait before their dreams come true. The programme was successful when utilised with a two-qubit quantum computer around 85% of the time. But when a third qubit was introduced, more errors occurred and the success rate fell to around 50%. Therefore, developing a system that can reverse time on a large scale is not going to happen any time soon because the findings from the experiment indicate that time reversal in nature is unlikely because it is too complex. Nevertheless, seeing how science has evolved over the years, with a prime example being that of the evolution of quantum physics, we should not put it past scientists to eventually come out with a device that can reverse time.

One quantum computing experts, who did not wish to be named, said: “I don’t know how useful this is … it doesn’t mean that these guys made a time machine. They certainly didn’t violate the laws of thermodynamics or the laws of physics.” He added: “This is the type of hype that is going to give quantum computing a bad name.”

Time machines and reverse the time is still a long journey for us. Nevertheless, seeing how science has evolved over the years, with a prime example being that of the evolution of quantum physics, we should not put it past scientists to eventually come out with a device that can reverse time.