Search for dissertations about: "qubits"

Showing result 1 - 5 of 66 swedish dissertations containing the word qubits.

  2. 1. Engineering superconducting qubits : towards a quantum machine

    Author : Joachim Sjöstrand; Anders Karlhede; Denis Vion; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Abstract : A quantum computer is an information processing machine, much like an ordinary classical computer, but its function is based on quantum mechanical principles. To be able to construct such a machine would be a fantastic accomplishment---to have total control over a quantum system is a dream for both physicists and science-fiction enthusiasts. READ MORE

  4. 2. Superconducting qubits - measurement, entanglement, and noise

    Author : Lars Tornberg; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum Electric Circuits; Open Quantum Systems; Quantum Optics; Quantum Computing; Superconducting Qubits; Quantum Measurement;

    Abstract : In the early 1980’s, it was suggested that a computer obeying the laws of quantum mechanics would be able to solve problems beyond the capabilities of a classical computer. The novel ways in which such a quantum computer works relies on the quantum properties of the quantum bits (qubits) used to store the information. READ MORE

  5. 3. Read-out of superconducting qubits - a quantum measurement process

    Author : Lars Tornberg; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; superconducting qubits; single Cooper Pair box; quantum measurements; quantum electrical circuits; quatum computing;

    Abstract : In this work we consider measurements on quantum systems emphasizingon read-out of superconducting qubits. The qubit is always coupled to anenvironment, containing a macroscopic number of degrees of freedom. Thisperturbs the qubit and destroys the phase coherence of the quantum state. READ MORE

  6. 4. Photonic Qubits for Quantum Communication : Exploiting photon-pair correlations; from theory to applications

    Author : Maria Tengner; Anders Karlsson; Alexei Trifonov; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum communication; photon-pair sources; entanglement; Physics; Fysik;

    Abstract : For any communication, the conveyed information must be carried by some physical system. If this system is a quantum system rather than a classical one, its behavior will be governed by the laws of quantum mechanics. READ MORE

  7. 5. Entanglement in quantum communication : preparation and characterization of photonic qubits

    Author : Daniel Ljunggren; Gunnar Björk; Hugo Zbinden; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonics; Fotonik;

    Abstract : At the heart of quantum physics lies the principle of superposition, and at the heart of information theory lies the bit. Perhaps the most useful property of quantum systems is that they can be loaded with information bits, so-called qubits, that are indefinitely both 0 and 1 until a measurement is made. READ MORE