A. Wallraff, Control and measurement of multiple qubits - PTB

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This work: • excitation spectrum of 4 coupled quantum systems measured • Tavis-Cummings model tested in the discrete limit • a step towards multi-qubit QIPC in circuit QED The future: • investigate collective excitations with small but fixed number of qubits • Dicke states • ssuperradiance perradiance • generate complex entangled states using collective interactions
quantum bus g g g Leek et al., Phys. Rev. B 79, 180511(R) (2009) • controlling photon life times on the quantum bus P. Leek, M. Baur et al., Quantum Device Lab (2009) • measuring i entanglement t l t bby joint j i t read-out d t with itha single i l ddetector t t Filipp et al., Phys. Rev. Lett. 102, 200402 (2009)
Page 1 and 2: Control and Measurement of Multiple
Page 3 and 4: Cavity Quantum Electrodynamics
Page 5 and 6: elements: • the cavity: a superco
Page 7 and 8: 5 Years of Quantum Electrodynamics
Page 9 and 10: Multi-Atom Cavity QED
Page 11 and 12: Three Qubit Circuit QED Setup
Page 13 and 14: N = 1, 2, 3 Qubit - Cavity Anti Cro
Page 15 and 16: • th the spectrum: t • the stat
Page 17: • th the spectrum: t • scaling
Page 21 and 22: Out of Single Qubit L. Steffen et a
Page 23 and 24: qubit A qubit A qubit B • Two nea
Page 25 and 26: standard resonator configuration co
Page 27 and 28: Engineering Mode-Dependent Photon L
Page 29 and 30: fundamental: • odd mode • decou
Page 31 and 32: : • create Fock state with blue s
Page 33 and 34: Side Band Rabi Oscillations with Fo
Page 35 and 36: Two-Mode Bell-State Generation and
Page 37 and 38: Correlation Measurement with Indivi
Page 43 and 44: Homodyne Measurement of Cavity Freq
Page 45 and 46: experimental state fidelity: F = 86
Page 47: The ETH Zurich Quantum Device Lab P

A. Wallraff, Control and measurement of multiple qubits - PTB

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