Controlling propagation and entanglement of multi-photon quantum states by driven
Abstract
Recent advances in quantum information technology have led to creation andmanipulation of quantum superposition and entanglement at an increasingly large scale. Theresultant exponential growth of complexity (i.e. dimension of Hilbert space) is a core quantumresource for computation, simulation, and communication applications beyond classicalcapabilities, but also imposes a paramount challenge for control and characterization.Importantly, none of the applications are expected to use the entire Hilbert space of a largequantum system. Therefore, it is advantageous and perhaps essential to autonomously confinethe system to a well-constructed subspace. Such confinement or stabilization of quantum statesrequires engineered interaction with dissipative reservoirs and has been realized in severalquantum platforms such as trapped ions, ultra-cold atoms, quantum optics, and superconductingcircuits. However, so far most demonstrations of reservoir engineering have been limited tolinear dissipation at a small scale. Here, working with microwave photons in superconductingcavities, we will realize a variety of engineered non-linear dissipation across two or moreexcitation modes using parametrically-driven Josephson junctions. Building upon our recentdemonstration of the entangled Schrodinger cat state, we will demonstrate spontaneousgeneration of hundreds-of-photons entanglement by driven dissipation and autonomousconfinement of multi-photon states to an entangled manifold between cavities. We will furtherrealize autonomous and non-reciprocal transfer of quantum information encoded in multi-photonstates, which can be an important building block for a quantum network or a modular quantumcomputer.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 09, 2018
- Source ID
- FA95501810092
Entities
People
- Chen Wang
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Massachusetts Amherst