Welcome TO QUEST group webpage!

Our QUEST (or QUantum Engineering, Science and Technology) involves engineering artificial systems, which can realize and exploit quantum mechanical effects at macroscopic scales. Besides being crucial for quantum computation and quantum information, macroscopic quantum systems also provide us platforms to explore the fundamental concepts of quantum physics itself. Our work involves proposing, developing and modeling such systems using a combination of analytical and numerical techniques. Specifically, we focus on superconducting circuits-based quantum information, nonlinear dynamics and dynamical symmetry breaking in open quantum systems. 

The wordle on the right, created with titles of our papers, gives a quick overview of the research in our group. More details can be found on our research and publications pages.


  • AUGUST 2017
    Quantum mechanics for early universe, see our new preprint!

    Our preprint on developing open quantum systems approach to understanding early universe appears on arxiv. This work was done in collaboration with our cosmologist friends --- Prof. Sarah Shandera at Penn State and Prof. Nishant Agarwal at UML, and focuses on capturing the effect of entanglement of observable universe with what's outside the observable horizon during cosmic inflation (epoch of exponential expansion of primordial universe). 
    Posted Aug 3, 2017, 9:50 AM by Archana Kamal
  • JUNE 2017
    QUEST group welcomes new summer intern

    QUEST group has a new summer intern Vishnu Chavva, currently a physics major at University of Illinois Urbana-Champaign. Welcome Vishnu!
    Posted Jun 6, 2017, 8:56 AM by Archana Kamal
  • MAY 2017
    QUEST group welcomes new members

    We are delighted to welcome graduate students Chung (Alvin) Kow and David Campbell, who are joining the QUEST starting summer 2017.
    Posted May 15, 2017, 1:29 PM by Archana Kamal
  • Mar 2017
    Nonreciprocal amplification paper published in Physical Review Applied

    Our paper on implementing directional/nonreciprocal amplification using minimal resources got published in Physical Review Applied. Enclosed is the mini-blurb accompanying the paper at Phys Rev Applied website.

    Detection and efficient readout of weak signals in the quantum regime are critical aspects of quantum information processing. Current measurement protocols rely on amplifiers plus signal routers (circulators or isolators), but bulk is problematic for any scalable architecture. The authors present minimal, efficient schemes to design nonreciprocal quantum-limited amplifiers for simultaneous routing and boosting of signals. This could lead to significantly simpler measurement chains, which is especially relevant in the face of increasingly complex multi-qubit experiments.
    Posted May 15, 2017, 1:28 PM by Archana Kamal
  • Dec 2016
    Quasiparticle pumping paper published in Science

    Our paper on quasiparticle pumping for suppressing qubit relaxation got published in the journal Science. You can also see the accompanying press release by Julich Reseacrh Center (Germany) for an accessible summary of this work.
    Posted May 15, 2017, 1:30 PM by Archana Kamal
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