Sökning: "quantum noise"
Visar resultat 11 - 15 av 115 avhandlingar innehållade orden quantum noise.
11. Quantum technologies for secure communications
Sammanfattning : Quantum technologies promise to revolutionize a variety of fields such as metrology, cryptography or computing, among others. The resources that quantum mechanics offers allow us to design faster optimization algorithms, to provide unconditional security in communications and to measure quantities beyond the grasp of current technology. LÄS MER
12. Digital measurement and control of microwave quantum circuits
Sammanfattning : Superconducting circuits are well established tools for quantum sensing anda promising new platform for quantum computing. Typically these quantumcircuits operate at microwave frequencies where the thermal noise at 10mK in a dilution refrigerator is small compared to the ground-state energy. LÄS MER
13. Measurement Back-Action and Photon Detection in Microwave Quantum Optics
Sammanfattning : In quantum optics, the interaction between atoms and photons is studied. In recent years, microwave quantum optics with superconducting circuits has emerged as an important tool for fundamental quantum optics experiments, and also as a promising way for implementing quantum computation. LÄS MER
14. Controllable coupling of superconducting qubits and implementation of quantum gate protocols
Sammanfattning : The concept of a quantum computer was invented in the beginning of the 1980s as a quantum generalization of the reversible classical computer. After discoveries in the middle of the 1990s of quantum algorithms, which wouldsolve some problems considered intractable for classical computers, the field of quantum computing has developed rapidly. LÄS MER
15. Probing quantum and classical noise in nano circuits
Sammanfattning : This thesis presents measurements of classical and quantum noise in nano circuits.The first part of the thesis, covers extensive measurements on charge noise sources.Low-frequency charge noise with the power spectrum close to 1/f(wherefis thefrequency) has been observed in a variety of systems. LÄS MER