MESOSCOPIC PHYSICS and QUANTUM COMPUTING
Realization of Protected Quantum Bits (qubits) based on ultra-small Josephson junctions. The goal is to develop a fundamentally new class of superconducting logical elements of a quantum computer that would be protected from all sources of local noises. In particular, we have developed two novel Josephson circuits intended as prototypes of protected qubits whose logical states are decoupled from the environment by encoding them in a parity of a large number (either the number of Cooper pairs on a small superconducting island, or the number of fluxons in a superconducting loop).
Quantum Phase Transitions in Unconventional Josephson Arrays. This research addresses two fundamental problems of quantum mechanics of interacting quantum systems: the quantum phase transitions in one dimension, and the many-body localization in complex quantum systems isolated from the environment. To address these phenomena, we develop novel arrays of nanoscale Josephson junctions designed to emulate the range of quantum models. The objectives are to explore the emergence of novel symmetries near the quantum critical point and the dynamics of these novel systems using the microwave spectroscopic and time-domain techniques developed for the characterization of superconducting qubits at ultra-low temperatures.
Quantum transport and interactions in mesoscopic conductors, with special emphasis on the decoherence effects in low-dimensional conductors at ultra-low temperatures.
Electron-phonon interaction in metals and semiconductors at ultra-low temperatures. The applied aspects of this research involve the development of ultra-sensitive hot-electron detectors of submillimeter and far infra-red electromagnetic radiation for the deep-space NASA missions (in collaboration with the Jet Propulsion Lab and Yale).
Quantum effects in the conductivity of high-mobility Si MOSFETs at ultra-low temperatures. In particular, we have studied the electron-electron interactions in two-dimensional systems in the regime of low carrier densities.
effects in single crystals of organic molecular semiconductors,
including the development of novel field-effect devices based
on organic crystals and exploring the fundamental processes that determine
operation and ultimate performance of organic electronic devices. Vitaly
Podzorov, who became a faculty at
fabrication of nanoscale electronic structures we have developed the
Our research is supported by the NSF and DARPA