Search for dissertations about: "quantum noise"

Showing result 11 - 15 of 115 swedish dissertations containing the words quantum noise.

  2. 11. Quantum technologies for secure communications

    Author : Junior Ricardo Gonzales Ureta; Ana Predojević; Matthias Kleinmann; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum Optics; Quantum Information; fysik; Physics;

    Abstract : 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. READ MORE

  4. 12. Digital measurement and control of microwave quantum circuits

    Author : Mats Tholén; Vladislav Korenivski; David B. Haviland; Stefan Filipp; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Superconducting circuits; circuit QED; quantum sensing; quantum capaci- tance; 3D cavity; bosonic codes; noise radar; instrumentation; supraledande kretsar; krets QED; kvantavkänning; kvantkapacitans; 3D ka- vitet; bosonic codes; brusradar; mätinstrument; Material and Nano Physics; Material- och nanofysik;

    Abstract : 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. READ MORE

  5. 13. Measurement Back-Action and Photon Detection in Microwave Quantum Optics

    Author : Anton Frisk Kockum; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Parity Measurement; Quantum Measurement; Quantum Optics; Quantum Stochastic Calculus; Circuit QED; Photodetection; Transmon; Dephasing;

    Abstract : 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. READ MORE

  6. 14. Controllable coupling of superconducting qubits and implementation of quantum gate protocols

    Author : Margareta Wallquist; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Controllable Qubit-Coupling; Single Cooper-Pair Box; Josephson Effect; Quantum Gate; Superconducting Circuit; Quantum Computer; Qubit; Quantum Electrical Circuit;

    Abstract : 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. READ MORE

  7. 15. Probing quantum and classical noise in nano circuits

    Author : Arsalan Pourkabirian; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; transmon; vacuum fluctuations; circuit-QED; SET; dynamical Casimir effect; two-level fluctuator; artificial atom; SQUID; charge noise;

    Abstract : 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. READ MORE