We’ve all dreamt of it – zipping through time, visiting the past, or peeking into the future. But is time travel just a figment of our imaginations, or could it be a reality someday? The answer, it turns out, is a bit more complex than a simple yes or no. It involves delving into the very fabric of reality, exploring the laws of physics, and confronting the limits of our understanding.
The Building Blocks of Reality: Dialectical Materialism and Causality
To understand the possibility of time travel, we need to grasp the fundamental concepts that govern our universe. Dialectical materialism, a philosophical framework, provides a set of basic categories that help us understand the relationships between things. One of these categories is causality – the idea that every event has a cause, and every cause has an effect. This principle is the foundation of our understanding of the world, from the simple act of dropping a ball to the complex workings of the universe.
The Quantum Realm: A World of Uncertainty
But the world of quantum mechanics, the realm of the very small, challenges our traditional understanding of causality. At the subatomic level, things behave in ways that defy our intuition. Particles can exist in multiple states at once, and the act of observation can influence the outcome of an event. This suggests that cause and effect may not be as straightforward as we thought.
The Time Travel Paradox:
So, if causality is not absolute, could we manipulate time? Could we travel to the past and change events, creating a paradox where our actions alter the very reality that led to our journey? The answer, according to some physicists, is a resounding no. The laws of physics, they argue, prevent us from altering the past, ensuring that the timeline remains consistent.
The Promise of Quantum Psychology:
But the story doesn’t end there. The development of quantum psychology, a field that explores the intersection of quantum mechanics and consciousness, suggests that our understanding of causality may be incomplete. Perhaps consciousness itself plays a role in shaping reality, allowing for possibilities that we haven’t yet imagined.
The question of time travel remains open. While the challenges are formidable, the possibilities are intriguing. The journey to understand the nature of time, causality, and consciousness is a journey of discovery, a quest to unravel the mysteries of our universe. And who knows, perhaps one day, we’ll be able to step into a time machine and explore the vast expanse of time itself.
Cause and result, necessity and contingency, possibility and reality, phenomenon and essence, content and form, are the five basic categories of materialist dialectics. Among them, the law of causality is the most controversial in quantum mechanics. Some people even think that quantum mechanics will kill the law of causality.
The law of causality refers to the direct or indirect causal relationship between things. In nature, every thing has its cause and the result of its development, and the development and change of anything has its inherent inevitability.
The law of cause and effect is a universal law in nature. What kind of cause corresponds to what kind of effect. As the saying goes: “If you sow melons, you will reap melons; if you sow beans, you will reap beans.” According to the understanding of classical physics, the emergence and development of any phenomenon or thing must have its reasons. The current state of everything in the universe is the result of the continuation of its historical state; the future motion state of an object is the result of the continuation of its current state of motion.
Effects arise from causes, which is the basic principle of the law of cause and effect. There can be no fruit without a cause; if there is a fruit, there must be a cause. The cause must come first, the result can only come later, and the time order of the two cannot be reversed. The law of cause and effect has a basic assumption: the arrow of time always moves forward, and future events cannot affect past events. Once a time travel event occurs, the law of cause and effect will definitely be destroyed.
Suppose you take a time machine and go back in time, when your mother was not yet born. Due to your mistake, the spacecraft crashed, killing your young grandmother.
You feel very guilty and sad, and don’t know how to explain it to your mother.
When you mustered up the courage and made up your mind to go to your mother to cry, you found:
The young grandmother disappeared due to a sudden disaster; when the grandmother is gone, the mother never existed; when the mother never existed, you never existed; because you never existed, time travel naturally never happened.
This is the Grandma Paradox about time travel, stranger than a dream and harder to understand than a dream.
The core question of this hypothesis is whether time travel is feasible. Time travel involves the issue of energy conservation. If you go back in time, some mass will increase for no reason at that point in time in the past, while some mass will inexplicably decrease at this point in time. From the perspective of the law of conservation of energy, in the macroscopic world of classical physics, time travel cannot be realized and the law of causality cannot be broken. However, in the non-local space-time of quantum mechanics, time travel can be realized through the entanglement of two “wormholes”.
The classical law of causality holds that if the unit universe we live in is regarded as an isolated system, then any current state in the unit universe is the result of the continuation and accumulation of its historical state.
In classical physics, as long as all the initial states of a system are accurately grasped, all future states of the system can be predicted. Laplace firmly believed in determinism. He said: “We can regard the present state of the universe as its past effects and future causes. If a wise man can know the positions of all natural moving forces and all naturally constituted objects at a given moment, , if he can also analyze these data, then in the universe The movement of the largest objects to the smallest particles was contained in a simple formula, and the future appeared to him only as the past. “Laplace’s Demon” has become one of the four mythical beasts of physics.
Laplace’s determinism comes from his confidence in the classical law of cause and effect, believing that human beings can fully grasp all situations of “cause” and can accurately predict all situations of “effect”. After the birth of quantum mechanics, Laplace’s determinism was questioned. Quantum mechanics believes that not only can human beings not be able to accurately predict all situations of “effects”, but they can also not fully grasp all situations of “causes”.
Classical physics believes that based on the current situation of the “effect”, it must be possible to deduce the past situation of the “cause”. Quantum mechanics believes that the present “cause” cannot determine the future “result”; the present “result” cannot be reversed into the past “cause”. Classical physics believes that electrons are like planets in the outer layer of the atomic nucleus, moving around the atomic nucleus. But quantum mechanics discovered a completely different situation: electrons have no prescribed orbits at all, only random areas. Particle physicist John Charlton Pokinghall pointed out: The position of electrons is uncertain. It is impossible to predict the position of an oxygen molecule after 50 collisions with other molecules using only Newtonian mechanics. matter. The process of classical physics is reversible, while thermodynamic theory finds that “real physical processes” are irreversible. The cause and effect in the microscopic quantum world is irreversible, and it is impossible for a time traveler to meet his grandmother when he returns to the “past”. The energy difference between two time and spaces can be balanced across time and space through quantum vacuum fluctuations.
The fatal blow to the classical law of causality is the uncertainty of quantum superposition states. Quantum superposition means that a quantum system can be in a superposition of different quantum states. For example, when an electron is in a non-observed state, its spin state can be either upspin or downspin; the spin state of an electron will only take on a definite state after an observation event occurs. , and the topspin or backspin presented is completely random. In a quantum superposition, a system can be in two states that are incompatible in the classical world at the same time. If the quantum superposition state is regarded as a “cause”, then this “cause” is an uncertain superposition state, and the “effect” caused by the observation cannot be accurately predicted. Microscopic quantum systems are uncertain and their motion states are completely random. The motion state of the microscopic quantum world can only be described by probability. The probabilistic causal law of quantum mechanics denies the deterministic causal law of classical physics.
The law of classical causality is broken in the microscopic quantum world, and we don’t need to panic. In fact, the uncertain microscopic quantum world will evolve into the determined macroscopic classical world. According to the principles of statistics, when the number of microscopic particle systems is large enough, the quantum system will transition to the determined macroscopic world through the law of probability. The uncertain movement in the microscopic quantum world will eventually manifest into the deterministic movement in the macroscopic world. For example, an electron transition emitting photons is a completely random event, but countless electron transitions emit photons, which will cause the object to glow and heat, turning it into a determinable physical quantity. At this time, the uncertainty of the quantum system is manifested in the macroscopic world. gain certainty.
The certainty of the macroscopic world evolves from the uncertainty of the microscopic quantum world. Similarly, the deterministic causal law of the macroscopic classical world also evolves from the probabilistic causal law of the microscopic quantum world. The movement of the microscopic quantum world follows an uncertain probabilistic causal law, but the cluster movement of a quantum system will appear as a deterministic causal law.
In classical physics, the experimenter is independent of the experimental object, and the impact of the observation event on the observation object is minimal and can be ignored. We cannot use the ideas of classical physics to understand the phenomena of microscopic quantum mechanics. The biggest difference between quantum mechanics and classical physics is that the experimenter himself cannot be independent from the experiment. We should get used to this way of expression and not try to use the lid of classical physics to match the tea cup of quantum mechanics. In the non-localized microscopic quantum world, it is inappropriate to use localized classical concepts to understand the causal connections of quantum systems. Quantum mechanics not only does not violate the laws of cause and effect, but also enriches the causal connections.
The discovery of non-local causality does not mean that local causality no longer applies to the macroscopic world. In fact, most fields of science still rely on the law of cause and effect. Science is based on experiments and observations, and most experimental data and observations can be explained by the classical law of causality. In quantum mechanics, the classical law of causality faces challenges, but it remains a very important concept in our daily lives and in scientific research.
The iron wall of the classical law of causality is broken by the quantum superposition formation, which will inevitably cause some people discomfort and even panic. But this is also a good thing. It leaves a blank space for the existence of free consciousness. You must know that under the rule of the classical law of causality, human beings have no sense of freedom at all. According to the perspective of classical causality, the motion state of every elementary particle, whether it is the past, present, or future, is determined. A person is composed of basic particles, including the brain, which means that every idea of a person is determined. If a person wants to do good things, it is determined; if he wants to do bad things, it is also determined; everything is determined, even if he wants to transcend this fate, it is also determined. Without a sense of freedom, morality and law lose the legitimacy of their existence. A person commits a crime entirely because of “destiny” and cannot help himself; even fighting such crimes becomes a fateful act. Human beings without a sense of freedom must live in unintentional absurdity.
The sense of fate caused by the classical law of cause and effect is like a huge shackle, imprisoning human beings. The emergence of quantum mechanics has left room for the existence of free consciousness. On this basis, quantum psychology explores the connection between quantum superposition and free consciousness. Quantum psychology believes that consciousness is in a state of quantum superposition and is not completely bound by the classical law of causality. With the deepening of quantum psychology research, we can better understand issues such as the existence of free consciousness and human behavioral choices, as well as the impact of quantum superposition on emotions and thinking. These research results can expand our understanding of the field of psychology and discover more mysteries about human consciousness and behavior.