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Why Quantum Computers Need to Be So Cold

Quantum computers need to be cold because fragile qubits can’t “hold the note” in a noisy, warm world. In this video, you’ll learn why many quantum machines run at ten to twenty millikelvin (colder than deep space) and how extreme cryogenics buys the one thing quantum computing needs most: control. We break down the three core reasons cold matters for superconducting qubits: Clean reset: cooling helps qubits start in the ground state instead of “excited” by thermal energy Longer coherence: fewer thermal photons and less vibration means less decoherence and more usable gate time Hardware physics: superconducting circuits and Josephson junctions only behave correctly in deep cryogenic conditions You’ll also see why dilution refrigerators use a “temperature staircase” (50 K → 4 K → 1 K → mK), why wiring and signal hygiene are scaling bottlenecks, and why error correction can multiply qubit counts fast. Finally, we compare platforms that avoid millikelvin fridges, like trapped-ion and neutral-atom systems, and what those tradeoffs mean. If this helped, hit like, drop your question below, and subscribe for more clear, no-hype quantum explanations. #QuantumComputing #Qubits #SuperconductingQubits #DilutionRefrigerator #QuantumHardware