Opportunity at National Institute of Standards and Technology (NIST)
Quantum Information Processing
Physical Measurement Laboratory, Quantum Electromagnetics Division
Please note: This Agency only participates in the February and August reviews.
|Pappas, David P.
In our group we develop superconducting quantum circuits including qubits, resonators, photon sensors (both kinetic inductance and nano-wire), and amplifiers. For qubits, we focus on improving the energy relaxation and coherence times, T1 and T2, using new designs and materials to reduce loss. A typical design is the transmon paddle type qubit coupled to a microstrip, with T1's currently around 1 us. We are looking for researchers who are interested in developing new circuits using these devices. We design circuits in-house using L-edit and Xic, grow the films in UHV sputter deposition chambers (3 in the group), fabricate them in the cleanroom, and characterize them at low temperature. Cryogenic resources include a two dilultion refrigerators, an ADR, and a PPMS (1.8 K). RF control is typically done with AWGs and IQ modulators to do up/down conversion with pulsed electronics, as well as VNA's and frequency synthesizers to conduct experiments in quantum computing and quantum optics. We also use distributed and lumped L-C element resonators to test new geometries and fabrication processes. Typical geometries are 1/4 and 1/2 wave resonators, as well as lumped element LCs (meander and IDC) coupled to CPW and microstrip lines. For the sensors, we have been developing MKIDs based on TiN, NbN, and NbTiNs. We are also designing and building dispersion-engineered traveling wave amplifiers using the nonlinear kinetic inductance of TiN and NbTiN. We are looking for Associates who have skills in any areas including design, fabrication, and testing of superconducting devices. Interest in quantum processes include QCED for electromagnetically induced transparency, dark state transer, quantum walks, spin transfer, and other quantum simulations on chains of qubits.
Superconducting circuits; Qubits; Coherence; Low loss resonators; High quality factor; Titanium nitride; Niobium titanium nitride; Kinetic inductance sensors;
Open to U.S. citizens
Open to Postdoctoral applicants