Cavity quantum electrodynamics for superconducting electrical circuits: An architecture for quantum computation

By Alexandre Blais, Ren-Shou Huang, Andreas Wallraff, Steven M. Girvin, Robert J. Schoelkopf. 2004

2,486 citations recorded by the source corpus.

We propose a realizable architecture using one-dimensional transmission line resonators to reach the strong-coupling limit of cavity quantum electrodynamics in superconducting electrical circuits. The vacuum Rabi frequency for the coupling of cavity photons to quantized excitations of an adjacent electrical circuit (qubit) can easily exceed the damping rates of both the cavity and qubit. This architecture is attractive both as a macroscopic analog of atomic physics experiments and for quantum computing and control, since it provides strong inhibition of spontaneous emission, potentially leading to greatly enhanced qubit lifetimes, allows high-fidelity quantum nondemolition measurements of the state of multiple qubits, and has a natural mechanism for entanglement of qubits separated by centimeter distances. In addition it would allow production of microwave photon states of fundamental importance for quantum communication.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/800081ea7b3c9823ebbac686481e407c3343a739

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Citations in the corpus

Superconducting quantum bits (2008, background): “8 ), and to use frequency selection to determine which qubits can be couple”
Nonlinear response of the vacuum Rabi resonance (2008, background): “Circuit quantum electrodynamics (QED) realizes the coupling between a superconducting qubit and the microwave field inside an on-chip transmission-line resonato”
Widely Tunable On-Chip Microwave Circulator for Superconducting Quantum Circuits (2017, background): “For reference, the typical power in a microwave tone used for dispersive readout [1] of a superconducting qubit”
Microwave photonics with superconducting quantum circuits (2017, methodology): “The corresponding effective Hamiltonian reveals that the cavity field experiences a frequency shift depending on the state of the qubit [6, 97].”
Quantum information processing and quantum optics with circuit quantum electrodynamics (2020, background): “1a), the qubit is fabricated in close proximity to the centre conductor of the resonator 7 .”
Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems (2012, background): “A charge or phase qubit placed at or near an antinode of the standing wave of the voltage on the SC wire can couple strongly to the electric field of the standing wave (Blais et al., 2004; Schoelkopf and Girvin, 2008; You et al., 2003).”
Resolving photon number states in a superconducting circuit (2006, methodology): “The observation of resolved photon number peaks in the qubit spectrum demonstrates a new regime for cavity QED systems, the strong dispersive limit.”
Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics (2004, background): “is especially well suited for cavity QED because of its large effective electric dipole moment d , which can be 10 4 times larger than in an alkali atom and ten times larger than a typical Rydberg ato”