When Albert Einstein first described quantum entanglement in 1935, he used terms like “spooky” due to its odd behaviour. It’s highly unlikely he ever envisioned these odd particles becoming the backbone of a quantum computer revolution.
At that time, Quantum physics was unlike anything the world had seen before, and it remains a cutting-edge science that has the potential to reshape the world as you know it. Today, quantum computers continue to push the boundaries of technology and are a crucial component in advancing the world’s understanding of quantum entanglement.
What Are Quantum Computers and How Do They Work?
Many see quantum devices as the future of high-speed computing. These powerful machines can outperform even the most advanced supercomputer by orders of magnitude. Their improved performance and capabilities come from the fact that these devices rely on quantum bits called qubits rather than traditional computing bits.
Qubits provide far more computing capabilities because they leverage the unique behavior of quantum physics. Actions like superposition, entanglement, and quantum interference can create computers with far greater capabilities than traditional systems.
Understanding Quantum Entanglement in Modern Computing
Impressively, quantum computers can provide such high performance due to the makeup of qubits and quantum entanglement. Quantum entanglement refers to a unique phenomenon where two particles remain interconnected, despite how far they are apart.
Even light years in distance won’t separate quantum-connected qubits. Notably, particles stuck in quantum entanglement can’t be described independently as their state is shared by all particles locked.
How Is Quantum Entanglement Detected Today? Current Methods Explained
One of the biggest roadblocks to making quantum computers more accessible is that it can be extremely difficult to detect quantum entanglement. The current method utilizes the Clauser-Horne-Shimony-Holt (CHSH) approach, which was introduced in 1969. This approach can detect entanglement by finding inconsistencies between quantum predictions and local realism.
Latest Breakthroughs in Quantum Computing: 2025 Update
The CHSH method has been the go-to approach for quantum computer engineers for years. However, recent AI advancements have made adaptive machine learning-based methods for entanglement detection more popular. Engineers have created powerful neural networks that can better monitor and classify quantum states between entangled and separable.
Limitations of Today’s Quantum Computers and How Scientists Are Overcoming Them
One of the main issues with today’s most advanced quantum computers goes back to the detection of entangled particles. These systems, like CHSH, can never achieve an accurate measurement as the method of observation has been proven to disrupt and destroy some quantum states.
Ironically, quantum entanglement can connect particles across galaxies, but is in itself very fragile. When CHSH tools are used to take measurements of a quantum state and local measurements on spatially separable subsystems, it inadvertently causes the collapse of the global wave function across much of the system.
New Study: How Quantum Computers Can Detect Their Own Entanglement
The study “Detecting and protecting entanglement through nonlocality, variational entanglement witness, and nonlocal measurements,”1 published in Physical Review Letters, highlights a better way to detect when quantum entanglement is achieved. Instead of relying on an AI algorithm to accomplish the task, engineers from Tohoku University and St. Paul’s School, London, introduced a quantum-powered option.
This is the first quantum algorithm that is capable of detecting entanglement without causing any damage. The engineers state that their new nonlocal measurement framework, called variational entanglement witness (VEW), enables quantum computers to conduct checkups in regard to their quantum state.
What Is Variational Entanglement Witness (VEW) in Quantum Computing?
The variational entanglement witness protocol begins by analysing each state using the proprietary quantum algorithm. This new system takes into account data gathered from a parametrized witness operator and combines it with any CHSH inequalities.
This approach allows the system to separate the particles into two categories, entangled and separable. Unlike previous approaches, this method allows for optimized entanglement detection without causing any degradation of entangled particles in the observation area.
Source – Tohoku University
Testing Quantum Computers: How VEW Preserves Entanglement
To test their theory, the engineers began by superconducting chips. The goal of this action was to simulate the nonlocal measurement and assess the post-measurement state of the quantum qubits to confirm the preservation of entanglement in the optimized areas. The testing included both lab tests and computer simulations.
The engineers concluded that their new method improves the reliability of entanglement detection across the board. It reliably outperformed earlier methods, including AI-assisted options, and optimizes the efficiency of distinguishing between separable and entangled states.
Keenly, the test demonstrates that the method can take detailed measurements without causing any wave function collapse. As such, it will be crucial in future technological discoveries and research where monitoring the quantum state of these particles is crucial to success.
Why VEW Matters: Benefits for the Future of Quantum Technology
There are several benefits that this quantum computing study brings to the market. For one, it allows engineers and researchers to accurately measure and assess entanglement properties without collapsing the quantum wave function. Consequently, it’s far more reliable and accurate than any current options.
Real-World Applications of Quantum Computers and What’s Next
There are many applications for this technology. For one, quantum computing will integrate this technology to improve its offerings and capabilities. Currently, quantum computers are insanely expensive due to their precision and maintenance costs.
For example, quantum computers require a very intense cooling system in order to operate. These systems can be optimized using this study’s data, as the new detection method will allow engineers to better track the effects of the system on entanglement.
Quantum Communication: Real-Time Connections with Entangled Particles
The quantum communication sector has the potential to revolutionize communication. Since quantum particles in an entangled state are connected, they make a perfect communication device. In the future, quantum communication will allow engineers and space travelers to communicate in nearly real time, regardless of distance and through any form of natural interference.
Quantum Cryptography: The Future of Unbreakable Security
Quantum cryptography utilizes quantum physics to complete cryptographic requirements. The power of these advanced systems has the ability to make current encryption methods obsolete. Currently, engineers are looking towards quantum computing options for both encryption and cracking current methods of cryptography.
The threat quantum computers pose to traditional encryption systems is very real. Already, there have been cryptocurrencies that are specifically built with quantum protection included in their coding as a way to future-proof the coins from new quantum hacking methods.
Quantum Computers Timeline
There is still a lot of work to be done to integrate this new quantum technology into today’s advanced computers. It could be 10+ years until you get your hands on an affordable personal quantum computer.
Despite the wait for commercial applications, you could see this tech put into immediate use by governments, militaries, and others seeking to further their understanding of quantum entanglement.
Meet the Researchers Behind the Quantum Entanglement Breakthrough
The quantum computing study was put forth by an assistant professor at the Frontier Research Institute for Interdisciplinary Sciences and the Graduate School of Engineering at Tohoku University, Le Bin Ho. He was assisted by Haruki Matsunaga and other engineers from Tohoku University and St. Paul’s School, London.
Future Plans
Now that the team has proven the effectiveness of their algorithm, their next goal is to improve its performance. Impressively, the researchers have already begun fine-tuning the algorithm to enhance its entanglement detection capabilities.
Top Companies Advancing Quantum Computing in 2025
The race to create affordable and reliable quantum computers is on. Major firms like Microsoft and NVIDIA dominate this sector and have poured millions into creating these high-end computing devices.
Notably, the advanced nature of the technology inevitably opens the door for smaller firms to become an upending presence in the market. Here’s one such firm that has garnered a lot of attention as of late
IonQ Inc. (IONQ -3.5%) entered the market in 2015. Notably, the company’s founders, Christopher Monroe and Jungsang Kim, had been working in the field of quantum mechanics for nearly 25 years. This experience allowed the company to very quickly enter the sector and become one of the top quantum computing researchers in the world.
Today, the Maryland-based quantum computer manufacturer has operations and clientele across the globe. They have inked high level contracts, including a $54.5 million contract with the U.S. Air Force Research Lab. The agreement tasks IonQ with creating infrastructure for future quantum systems.
Since its launch, IonQ has secured several high-level investors and industry professionals. Notably, in 2019, Peter Chapman from Amazon Prime was named the CEO. Since then, the firm has made strategic partnerships with Azure, Google Cloud, and Microsoft, to name a few.
Those seeking a reliable and proven quantum computer stock should do more research into IONQ. The firm’s track record and continued investments in its network and products have helped it secure a strong “Buy” rating from most analysts.
Latest on IonQ Inc.
Why the Quantum Computing Revolution Changes Everything
The introduction of quantum computers is a major step for humanity. It will open the door for more advanced AI systems and allow engineers to conduct simulations and research on an entirely new scale.
All of these factors make this study a game changer. As such, the team behind this research deserves a salute for their efforts and hard work. It lays the foundation for the next computational revolution.
Learn about other cool computer breakthroughs now.
Studies Referenced:
1. Matsunaga, H., & Ho, L. B. (2025). Detecting and protecting entanglement through nonlocality, variational entanglement witness, and nonlocal measurements. Physical Review Research, 7(1), 013239. https://doi.org/10.1103/PhysRevResearch.7.013239