J. Majer

Publications67
h-index25
Citations5,443
Highly Influential Citations147
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Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
TLDR
It is shown that the strong coupling regime can be attained in a solid-state system, and the concept of circuit quantum electrodynamics opens many new possibilities for studying the strong interaction of light and matter.
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Coupling superconducting qubits via a cavity bus
TLDR
These experiments show that two nearby qubits can be readily coupled with local interactions, and show the implementation of a quantum bus, using microwave photons confined in a transmission line cavity, to couple two superconducting qubits on opposite sides of a chip.
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Qubit-photon interactions in a cavity: Measurement-induced dephasing and number splitting
We theoretically study measurement-induced dephasing of a superconducting qubit in the circuit QED architecture and compare the results to those obtained experimentally by Schuster et al. [Phys. Rev.…
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Protecting a spin ensemble against decoherence in the strong-coupling regime of cavity QED
Hybridized systems offer a promising route for developing quantum devices, but inhomogeneous broadening limits the practical use of large spin ensembles. Suppression of the decoherence induced by…
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ac Stark shift and dephasing of a superconducting qubit strongly coupled to a cavity field.
TLDR
Spectroscopy of a superconducting charge qubit coupled nonresonantly to a single mode of an on-chip resonator and a crossover in line shape with measurement power is observed and theoretically explained.
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Cavity QED with magnetically coupled collective spin states.
TLDR
Strong coupling between an ensemble of nitrogen-vacancy center electron spins in diamond and a superconducting microwave coplanar waveguide resonator is reported and hyperfine coupling to (13)C nuclear spins is measured, which is a first step towards a nuclear ensemble quantum memory.
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Cavity QED with an ultracold ensemble on a chip: Prospects for strong magnetic coupling at finite temperatures
We study the nonlinear dynamics of an ensemble of cold trapped atoms with a hyperfine transition magnetically coupled to a resonant microwave cavity mode. Despite the minute single-atom coupling, one…
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Smooth Optimal Quantum Control for Robust Solid-State Spin Magnetometry.
We experimentally demonstrate a simple yet versatile optimal quantum control technique that achieves tailored robustness against qubit inhomogeneities and control errors while requiring minimal…
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Spectral hole burning and its application in microwave photonics
Rabi oscillations with a decay time of 26.7 μs are observed in a system comprising the electron spins in a diamond nitrogen–vacancy centre and a superconducting microwave cavity. Such oscillations…
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Superradiant emission from colour centres in diamond
Superradiance is a fundamental collective effect where radiation is amplified by the coherence of multiple emitters1. Superradiance plays a prominent role in optics (where it enables the design of…
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