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Quantum Computer Solutions

01 /How to build a qubit 02 /Spin qubits (beginner level) 03 /Operations on spin qubits (beginner level) 04 /Electron spin qubits 05 /Capturing a single electron 06 /Quantum dot qubits 07 /Quantum control and readout 08 /Qubit errors 09 /NV center qubits 10 /Operations on NV center qubits 11 /The Transmon Qubit - A basis for the Quantum Computer 12 /Operations on the Transmon Qubit - Circuit QED 13 /Single-qubit operations on the Transmon qubit 14 /Measurements on the Transmon Qubit 15 /Two-qubit operations on the Transmon qubit 16 /Topological qubits: Anyons 17 /Operations on anyons: Braiding 18 /Operations on anyons: Real-life experiments 19 /Topological quantum computing: Majorana fermions and where to find them 20 /Majorana bound states in superconductors 21 /How do you measure Majorana bound states? 22 /A framework for the future Quantum Computer 23 /The Building Blocks of a Quantum Computer 24 /How to build a Quantum Algorithm - Quantum Circuits 25 /How do you program a quantum algorithm? 26 /The compiler of a quantum computer 27 /Micro-architectures 28 /How do we connect our quantum system to a classical interface? 29 /Assembling a Quantum Processor 30 /Microwave drivers for qubits 31 /Implementation of microwave drivers 32 /Quantum error correction 33 /Surface codes 34 /Fault-tolerant Quantum Error Correction with surface codes

A framework for the future Quantum Computer

What would happen if we try to make a quantum computer for higher temperatures? And what is the difference between a logical qubit and a physical qubit?

Higher temperatures allow physical systems to have higher thermal energies. As we have seen in the case of Majoranas, this introduces errors in the system.

A physical qubit is a physical degree of freedom that can take two values or a superposition of these two (|0> and |1>). On the other hand, a logical qubit is more of a mathematical concept: we use physical qubits to encode logical qubits. This means we will use logical qubits to perform quantum computation, but these are represented by physical qubits in a physical system.