The superconducting quantum circuits group at Néel Institute in Grenoble offers a postdoctoral position. Over the recent years, our team has specialized in large kinetic inductance superconducting quantum circuits working at milliKelvin temperatures [1] with applications ranging from novel superconducting qubits to state-of-the-art quantum limited amplifiers [2]. Your main task will be to build much-anticipated devices such as broadband single photon detectors or quantum limited amplifiers, leveraging our Traveling Wave Parametric Amplifiers (TWPA) expertise.

The superconducting quantum circuits group at Néel Institute in Grenoble offers a postdoctoral position. Over the recent years, our team has specialized in large kinetic inductance superconducting quantum circuits working at milliKelvin temperatures with applications ranging from novel superconducting qubits to state-of-the-art quantum limited amplifiers. Your main task will be to combine superinductances and innovative circuit geometry to build the next generation superconducting qubits with enhanced quantum coherence and intrinsically protected gates.

The superconducting quantum circuits group at Néel Institute in Grenoble offers a PhD position. Over the recent years, our team has specialized in large kinetic inductance superconducting quantum circuits working at milliKelvin temperatures with applications ranging from novel superconducting qubits to state-of-the-art quantum limited amplifiers. Your main task will be to build much-anticipated devices such as broadband single photon detectors or quantum limited amplifiers, leveraging our Traveling Wave Parametric Amplifiers (TWPA) expertise.

Acoustic and nanomechanical systems have recently emerged as a powerful quantum technology, with applications ranging from quantum sensing to quantum information science. This project aims to develop a hybrid quantum acoustics architecture that will enable us to explore topics ranging from coherent spin-phonon interactions, the acoustics of 2D materials in the quantum regime, to the engineering of devices to interface spin qubits.

Context : In quantum nanoelectronics, one of the major goals is the use of quantum mechanics for the development of nanoprocessors that are more and more efficient. This requires the ability to control quantum phenomena at the single electron scale within nanostructures. In this context, the degree of freedom of the electron spin has been identified as a potential candidate for the support of quantum information. We can define the elementary block of the nanoprocessor by capturing a single electron (and therefore its spin) inside a quantum dot. The development of a quantum circuit will follow the same methods of microelectronic circuits conception, by connecting the elementary bricks, while respecting the constraints of controlling the individual spins. Nowadays, in quantum dots systems, all the elementary operations required for the functioning of a quantum processor have been demonstrated in trapped spins of AsGa heterostructures. The effort of the spin qubits community turns to the transposition of these demonstrations for trapped spins in silicon structures, whose fabrication is compatible with CMOS industrial processes. 

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Context : In quantum nanoelectronics, one of the major goals is the use of quantum mechanics for the development of nanoprocessors that are more and more efficient. This requires the ability to control quantum phenomena at the single electron scale within nanostructures. In this context, the degree of freedom of the electron spin has been identified as a potential candidate for the support of quantum information. We can define the elementary block of the nanoprocessor by capturing a single electron (and therefore its spin) inside a quantum dot. The development of a quantum circuit will follow the same methods of microelectronic circuits conception, by connecting the elementary bricks, while respecting the constraints of controlling the individual spins. Nowadays, in quantum dots systems, all the elementary operations required for the functioning of a quantum processor have been demonstrated in trapped spins of AsGa heterostructures. The effort of the spin qubits community turns to the transposition of these demonstrations for trapped spins in silicon structures, whose fabrication is compatible with CMOS industrial processes.

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The internship is motivated by our recent investigations of ultra-scaled hybrid Al/Ge devices that we achieved using bottom-up grown Germanium nanowires and a selective thermal induced Al/Ge exchange reaction. It leads to pure and remarkable atomically sharp interfaces between Al and Ge. Integrating such structures in a Josephson field-effect transistor (FET) we were able to demonstrate highly transparent interfaces and superconducting proximity effect through a pure Ge segment. These results imposed already such Al/Ge devices as promising candidates for superconducting qubits.

For some decades, significant efforts have been invested in quantum information research, with the promise to revolutionise the way information is stored and processed. The strength of quantum computing lies in the possibility of using a coherent superposition of states, and interference between them, which enables a class of algorithms that are not accessible to classical computers. To achieve the fabrication of quantum computers, the first step is to realise a quantum bit. It must be fully controllable and measurable, which requires a connection to the macroscopic world. In this context, solid state devices, which establish electrical connections to the qubit are of high interest.

The aim of the proposed M2 internship is to participate in an ongoing research project to realize flying qubit architectures by propelling single electrons with sound. The fact that electrons transported by sound waves travel 5 orders of magnitude slower than the speed of light allows to implement real-time manipulation of the quantum state of the electrons “in-flight”. This novel real-time control will be developed during the Masters project within the QUANTECA team of the Néel Institute.