Stefan Putz
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View article: An on-demand source of nanoparticles for optomechanics
An on-demand source of nanoparticles for optomechanics Open
The generation of nanoparticles on demand, with good control over their size and shape, has been a challenge for nanotechnology and the rapidly growing field of levitated optomechanics. Here, we present the preparation, launch, and detecti…
View article: High finesse microcavities in the optical telecom O-band
High finesse microcavities in the optical telecom O-band Open
Optical microcavities allow us to strongly confine light in small mode volumes and with long photon lifetimes. This confinement significantly enhances the interaction between light and matter inside the cavity with applications such as opt…
View article: Split-gate cavity coupler for silicon circuit quantum electrodynamics
Split-gate cavity coupler for silicon circuit quantum electrodynamics Open
Coherent charge-photon and spin-photon coupling has recently been achieved in silicon double quantum dots (DQDs). Here, we demonstrate a versatile split-gate cavity-coupler that allows more than one DQD to be coupled to the same microwave …
View article: Electric-field control and noise protection of the flopping-mode spin qubit
Electric-field control and noise protection of the flopping-mode spin qubit Open
We propose and analyze a novel "flopping-mode" mechanism for electric dipole\nspin resonance based on the delocalization of a single electron across a double\nquantum dot confinement potential. Delocalization of the charge maximizes the\ne…
View article: Electrical control and decoherence of the flopping-mode spin qubit
Electrical control and decoherence of the flopping-mode spin qubit Open
We propose and analyze a novel mechanism for electric dipole spin resonance based on the delocalization of a single electron across a double quantum dot confinement potential. Delocalization of the charge maximizes the electronic dipole m…
View article: Superradiant Hybrid Quantum Devices
Superradiant Hybrid Quantum Devices Open
Superradiance is the archetypical collective phenomenon where radiation is amplified by the coherence of emitters. It plays a prominent role in optics, where it enables the design of lasers with substantially reduced linewidths, quantum me…
View article: Ultralong relaxation times in bistable hybrid quantum systems
Ultralong relaxation times in bistable hybrid quantum systems Open
Amplitude bistability in a solid-state hybrid quantum system shows critical slowing down with ultralong relaxation times.
View article: Solid-state electron spin lifetime limited by phononic vacuum modes
Solid-state electron spin lifetime limited by phononic vacuum modes Open
Longitudinal relaxation is the process by which an excited spin ensemble decays into its thermal equilibrium with the environment. In solid-state spin systems relaxation into the phonon bath usually dominates over the coupling to the elect…
View article: Coherent Coupling of Remote Spin Ensembles via a Cavity Bus
Coherent Coupling of Remote Spin Ensembles via a Cavity Bus Open
We report coherent coupling between two macroscopically separated nitrogen-vacancy electron spin ensembles in a cavity quantum electrodynamics system. The coherent interaction between the distant ensembles is directly detected in the cavit…
View article: Sustained photon pulse revivals from inhomogeneously broadened spin ensembles
Sustained photon pulse revivals from inhomogeneously broadened spin ensembles Open
A very promising recent trend in applied quantum physics is to combine the advantageous features of different quantum systems into what is called “hybrid quantum technology”. One of the key elements in this new field will have to be a quan…
View article: Publisher's Note: “Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator” [Appl. Phys. Lett. <b>109</b>, 033508 (2016)]
Publisher's Note: “Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator” [Appl. Phys. Lett. <b>109</b>, 033508 (2016)] Open
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View article: Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator
Collective strong coupling with homogeneous Rabi frequencies using a 3D lumped element microwave resonator Open
We design and implement 3D-lumped element microwave cavities that spatially focus magnetic fields to a small mode volume. They allow coherent and uniform coupling to electron spins hosted by nitrogen vacancy centers in diamond. We achieve …