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Since january 2019, the Quantum Electronic Circuits Alps team gathers researchers from the Quantum Coherence (CQ) and the NanoSpin teams. This merger is part of an ambitious effort to build a joint research group together with teams from CEA-IRIG and CEA-LETI in order to face the challenge of the rapidly developping field of Quantum Technologies.
Its research activities can be decomposed into four main topics :
The team members share common research interests and develop original experimental techniques for electronic transport measurements and microwave techniques to observe and control new quantum effects in various different materials. The team’s specificity lies within the quantum nano-electronic circuit itself that defines the novel physics, the material used to build it and the measurement technology. To have access to quantum coherence effects in electronic systems and to their coherent manipulation, very stringent experimental conditions are required such as very low temperature, very low noise and weak measurement signals, microwave techniques as well as high quality nano-fabricated samples.
Original results from the team were obtained also thanks to a continuous effort to develop novel technology (Josephson-junction arrays, scanning probe experiments …) and novel high-quality nanostructures (topological insulators, epitaxially grown superconductors …). During the last 5 years, the team has been strongly involved in building novel experimental set-ups to control multi-qubit systems, to develop quantum-limited amplifiers, to develop opto-electronic techniques compatible with cryogenic environment and to develop cryogenic refrigerators. The team has significantly increased the number of its experimental sites. This was made possible thanks to a strong support of the NEEL technological groups, to grants through funded projects and also to the dynamism and commitment of permanent as well as non permanent researchers.
The joint research team focuses its research on experimental studies to reveal quantum effects in original and novel quantum nano-electronics devices. Its research activities can be decomposed into four main topics :
The team members share common research interests and develop original experimental techniques for electronic transport measurements and microwave techniques to observe and control new quantum effects in various different materials.
The team’s specificity lies within the quantum nano-electronic circuit itself that defines the novel physics, the material used to build it and the measurement technology.
To have access to quantum coherence effects in electronic systems and to their coherent manipulation, very stringent experimental conditions are required such as very low temperature, very low noise and weak measurement signals, microwave techniques as well as high quality nano-fabricated samples.
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In PTA and Nanofab clean rooms, both at Grenoble, we have access to state of the art clean-room facilities :
Our group is specialized in transport measurement at very low temperatures. This requires skills in cryogenics and specific wiring. Here are some examples of dilution fridges :
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Dilution fridge called « SIONLUDI » it is an inverted fridge with important space for RF electronics and a base temperature close to 20 mK (cooling power 250 µW). It is wired with 8 RF coax lines, 16 thermocoax wires and 27 manganine wires filtered with ECOSORB. It is equipped with a small fast magnet that can generate a magnetic field up to 1 T. |
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Dilution fridge called « WODAN » it is a wet dilution fridge with important space for RF electronics and a base temperature close to 20 mK (cooling power 1 mW). It is wired with 8 RF coax lines, 27 thermocoax wires. It is equipped with two axis magnet 6T-3T |
In collaboration with the « pôle electronique » of the Neel Institute, we are developping low noise electronics (such as current amplifiers, low noise and highly stabel DACs, voltage amplifiers) but also RF electronics (such as RF amplifiers, RF-DACs).
Position type: Stages Master-2 & Thèse
Contact: Naud Cécile -
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.
Position type: Stages Master-2 & Thèse
Contact: Roch Nicolas - | -
One of the present leading technologies for the realization of a universal quantum
computer is based on superconducting quantum circuits. It exploits superconducting circuits
based on Josephson junctions, which are characterized by quantized energy levels and for this reason can be adopted as quantum bits (qubits), the basic units of quantum information.
The idea of this project is to take advantage of this technology to finally observe an effect that has been elusive to physicists for 40 years: voltage Bloch oscillations. This could allow to close the electrical metrology triangle and is an important milestone towards quantum-defined metrology.
Position type: Stages Master-2 & Thèse
Contact: Balestro Franck - 0476887915
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.
Position type: Stages Master-2 & Thèse
Contact: Nicolas Roch - +33 4 56 38 71 77
During the last decade, it has been demonstrated that superconducting Josephson circuits behave as quantum bits and are very well suited to realize advanced quantum mechanical experiments. These circuits appear as artificial atoms whose properties are defined by their electronic characteristics (capacitance, inductance and tunnel barrier).
Position type: Stages Master-2 & Thèse
Contact: Buisson Olivier - 04 56 38 71 77
During the last decade, it has been demonstrated that superconducting Josephson quantum circuits constitute ideal blocks to realize quantum mechanical experiments and to build promising quantum bits for quantum information processing. These circuits appear as artificial atoms whose properties are fixed by electronics compounds (capacitance, inductance, tunnel barrier). Recently we demonstrated a new quantum measurement which overcomes the usual limitations.
Position type: Stages Master-2 & Thèse
Contact: BALESTRO Franck - +33 4 76 88 79 15 | VIENNOT Jérémie - +33 4 76 88 79 05
The realization of an operational quantum computer is one of the most ambitious technological goals of today’s scientists. In this regard, the basic building block is generally composed of a two-level quantum system (a quantum bit). Electrons possessing a spin 1/2 are conventionally thought as the natural carriers of quantum information, but alternative concepts make use of the outstanding properties of molecular magnets.
Position type: Stages Master-2 & Thèse
Contact: VIENNOT Jeremie - +33 4 76 88 79 05
Acoustic and nanomechanical systems have recently emerged as a powerful quantum technology. They now appear as a promising strategy to detect and manipulate solid-state spin qubits. With the prospect of large-scale quantum computing, finding efficient ways to readout, control and couple distant spin qubits is the source of an intense research effort worldwide. To achieve highly coherent interactions between single spins and single phonons, a central goal is now to push the development of mechanical oscillators with both high frequency and strong quantum fluctuations.
Position type: Stages Master-2 & Thèse
Contact: BAUERLE Christopher - 04 76 88 7843 | -
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.
Person in charge: Franck BALESTRO
Permanents
Students & Post-docs & CDD
Christopher BAUERLE
Personnel Chercheur - CNRS
Christopher.Bauerle@neel.cnrs.fr
Phone: 04 76 88 78 43
Office: M-113
Matias URDAMPILLETA
Personnel Chercheur - CNRS
matias.urdampilleta@neel.cnrs.fr
Phone: 04 76 88 79 34
Office: M-107
Karthik BHARADWAJ
Personnel Chercheur - UGA
karthik.bharadwaj@neel.cnrs.fr
Phone: 04 56 38 71 78
Office: Z-218
Referent: Wiebke HASCH
Bruna CARDOSO-PAZ
Personnel Chercheur - CNRS
bruna.cardoso-paz@neel.cnrs.fr
Phone: 04 76 88 79 47
Office: M-104
Referent: Tristan MEUNIER
Emmanuel CHANRION
Personnel Chercheur - UGA
emmanuel.chanrion@neel.cnrs.fr
Phone: 04 56 38 70 25
Office: M-111
Referent: Tristan MEUNIER
Thibault CHARPENTIER
Personnel Chercheur - CNRS
thibault.charpentier@neel.cnrs.fr
Phone: 04 76 88 70 61
Office: D-318
Referent: Nicolas ROCH
Jovian DELAFORCE
Personnel Chercheur - UGA
Phone: 04 76 88 79 05
Office: D-212
Referent: Olivier BUISSON
Hermann EDLBAUER
Personnel Chercheur - CNRS
Referent: Christopher BAUERLE
Dorian FRAUDET
Personnel Chercheur - CNRS
Office: D-313
Referent: Nicolas ROCH
Clément GEFFROY
Personnel Chercheur - CNRS
Phone: 04 56 38 70 25
Office: M-111
Referent: Christopher BAUERLE
Sarah HEKKING
Personnel Chercheur - CNRS
Office: D-216
Referent: Jérémie VIENNOT
Vladimir MILCHAKOV
Personnel Chercheur - CNRS
vladimir.milchakov@neel.cnrs.fr
Phone: 04 56 38 71 78
Office: Z-218
Referent: Olivier BUISSON
David NIEGEMANN
Personnel Chercheur - UGA
Phone: 04 76 88 79 47
Office: M-104
Referent: Matias URDAMPILLETA
Mohamed Seddik OUACEL
Personnel Chercheur - CNRS
mohamed-seddik.ouacel@neel.cnrs.fr
Referent: Christopher BAUERLE
Christopher SCHNUR
Personnel Chercheur - CNRS
christopher.schnur@neel.cnrs.fr
Office: D-318
Referent: Jérémie VIENNOT
Cameron SPENCE
Personnel Chercheur - UGA
Phone: 04 56 38 70 25
Office: M-111
Referent: Matias URDAMPILLETA
Jun-Liang WANG
Personnel Chercheur - UGA
Phone: 04 56 38 70 25
Office: M-111
Referent: Christopher BAUERLE
Pierre-André MORTEMOUSQUE
Personnel Chercheur - CEA
pierre-andre.mortemousque@neel.cnrs.fr
Referent: Tristan MEUNIER
Wolfgang WERNSDORFER
Personnel Chercheur - Institut de Physique du KIT
Wolfgang.Wernsdorfer@neel.cnrs.fr
Phone: 04 76 88 79 09
Office: D-113
Referent: Franck BALESTRO
