Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallQuantum computing is not known to be impossible, but building a large, useful machine remains an unresolved engineering challenge. Mikhail Dyakonov’s case against it is that precise, coherent control and error correction may not scale from small experiments to useful computations. Later experiments have weakened the claim that error correction is merely theoretical, but they have not shown that general-purpose, fault-tolerant quantum computers are near at hand.
What is the case against quantum computing?
In his 2018 IEEE Spectrum essay, “The Case Against Quantum Computing,” Mikhail Dyakonov focuses on the gap between the mathematical description of a quantum computer and the difficulty of building and operating one. An N-qubit state is described by 2N complex amplitudes. Dyakonov argues that controlling a useful machine therefore poses a problem of precision and scale far beyond what small demonstrations establish.
His argument contrasts quantum systems with conventional digital computers. Classical hardware represents information in discrete bits, and established error-correction techniques can add redundancy to detect and repair bit errors. Quantum states are more delicate: measurement can disturb the state, and physical operations cannot be assumed to be perfectly precise. Dyakonov questions whether the idealized assumptions that make fault-tolerant computing possible can be met in real devices.
He also argues that theory can describe large arrays more readily than engineers can build, calibrate, and operate them. That is a serious feasibility challenge, but it is an argument about engineering scale—not a proof that quantum computation cannot work. The hardware examples and forecasts in a 2018 essay should not be read as measurements of the field today.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Does a quantum computer have to control every amplitude?
That is a key point of disagreement. In a 2019 response, “The Case for Quantum Computing,” Fred Chong, Ken Brown, and Yongshan Ding argue that Dyakonov treats a quantum computer too much like an analog device that must directly set and maintain every component of its exponentially large state.
Their response describes a modular, digital approach. Quantum error-correction codes encode information across multiple physical qubits. Rather than directly measuring the encoded information, a computer can measure error syndromes: information that helps identify which errors may have occurred while preserving the logical state. The intended result is to detect and correct errors without simply letting control imperfections accumulate across the entire state.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
This answer does not make the engineering problem disappear. Error correction has historically required substantial physical-qubit overhead, and higher physical error rates make that overhead worse. The methods and expectations discussed in the 2019 response describe a strategy and its prospects at that time; they are not evidence that the proposed scale had already been reached.
| Question | Dyakonov’s skeptical emphasis | The technical response and later evidence |
|---|---|---|
| Can error-correction assumptions be achieved in hardware? | Real devices have imperfect preparation, operations, and measurements; idealized threshold assumptions may not hold in practice. | Chong, Brown, and Ding argue that encoded logical operations and syndrome measurements offer a practical digital strategy. A 2025 experiment later demonstrated below-threshold surface-code memory, but not a complete fault-tolerant computer. |
| What happens to resource needs as logical errors fall? | The required control and scale may be far beyond what can be built and operated. | Overhead remains substantial. In its 2025 paper, Google Quantum AI and collaborators extrapolated that a distance-27 logical qubit targeting a 10−6 logical error rate would require 1,457 physical qubits in their setup; this is a projection for that experiment, not a measured universal requirement. |
| Are errors local and manageable? | Real hardware may violate assumptions that make correction tractable. | The 2025 paper identifies rare correlated error bursts and real-time decoding as challenges, including a repetition-code error floor associated with correlated events. |
| Does a logical-memory demonstration establish useful computing? | A few-qubit demonstration does not settle whether large systems can run useful computations. | A memory result is meaningful progress in error correction, but it does not demonstrate long algorithms, commercial advantage, or cryptographic code-breaking. |
What did the 2025 error-correction experiment prove?
Google Quantum AI and collaborators reported a surface-code experiment in Nature, whose version of record appeared on 29 January 2025. The experiment used a 101-qubit, distance-7 logical memory. As code distance increased, its logical error rate improved; the authors reported that increasing distance by two suppressed errors by a factor of 2.14 ± 0.02. They described the system as operating below threshold: in this experiment, increasing the code distance reduced rather than increased the logical error rate.
Free tools Windows power users keep installed
One-click scans. No signup required.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
The distance-7 logical memory lasted 2.4 ± 0.3 times as long as its best constituent physical qubit. That is important evidence that error correction can produce a logical memory that outperforms its component qubits under the experiment’s conditions. It is not evidence that all error sources have been eliminated or that the same performance follows automatically in other hardware architectures.
A logical memory stores quantum information; a general-purpose fault-tolerant computer must also carry out long sequences of reliable operations at useful scale. The Nature result did not demonstrate commercially useful algorithms or a general-purpose fault-tolerant machine.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
The resource and noise limits still matter
The same paper’s extrapolation for a logical error rate of 10−6 calls for a distance-27 logical qubit using 1,457 physical qubits. That is a projection from the reported experiment, not a measured device or a general estimate for every quantum-computing design. Lower logical error rates and larger computations can require significant additional resources.
The authors also identify real-time decoding—the rapid interpretation of syndrome measurements—as an engineering demand. Rare correlated bursts can be especially troublesome because an error-correction scheme may be less effective when errors occur together rather than independently. The reported repetition-code error floor associated with correlated events illustrates why a below-threshold result does not mean every important noise problem is solved. The paper received an author correction dated 28 April 2026.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Does this mean quantum computers will never be practical?
No. The evidence supports neither certainty that useful machines will arrive soon nor certainty that they can never be built. The 2025 memory experiment shows progress on a central technical requirement. It does not settle whether engineers can scale error correction, control correlated noise, supply enough physical qubits, and run computations long enough to deliver a useful result.
“Useful” also depends on the task. Foundational research, specialized simulation, commercial advantage, and breaking widely used cryptography are different milestones. Evidence for one does not establish the others.
A 2018 IEEE Spectrum account of the National Academies assessment quoted the committee as saying it was “highly unexpected” that a quantum computer able to compromise RSA-2048 or comparable discrete-log public-key cryptography would be built within the following decade, given the state of the field and recent progress at that time. The committee did not give a specific arrival date for practical machines and said there was no guarantee the challenges would be overcome. That is a dated forecast about a particular cryptographic capability, not a current countdown or a verdict on every possible quantum application.
The same account noted the committee’s view that quantum computing can be valuable for foundational research even if a practical general-purpose machine is never built. The field’s scientific value therefore does not depend solely on whether it reaches commercial or cryptographic milestones.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →How should readers judge claims about quantum computing?
- Look for the demonstrated task. A logical memory is evidence about storing information with error correction; it is not the same achievement as running a long, useful algorithm.
- Separate a measurement from an extrapolation. The 2025 study measured a distance-7 memory and reported its performance. Its distance-27, 1,457-qubit figure is a projection for a specified target in that experiment.
- Ask how the noise behaves. Threshold-based arguments depend on hardware errors being manageable. Correlated events and decoder constraints are among the practical complications identified by the Nature authors.
- Specify what “useful” means. A claim about scientific experiments should not be silently expanded into a claim about commercial advantage or code-breaking.
- Date predictions. The National Academies assessment discussed above was reported in 2018. Scott Aaronson, in a March 2026 interview, described skepticism as having weakened as gate fidelities and error-correction demonstrations improved; that is attributed expert commentary, not experimental evidence.
The strongest skeptical conclusion is that scale, resource costs, and real-world noise could prevent quantum computing from becoming practically useful. The strongest rebuttal is that modular error correction has moved beyond theory into experiments where a logical memory improves with code distance and outlasts its best physical component. Neither position turns the remaining engineering work into a foregone conclusion.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
