Dissipative synthesis and distillation of remote entanglement
Abstract
The question how quantum entanglement can be preserved in open systems is a fundamental question that holds crucial implications for applications in quantum information science. This research program aims to theoretically and experimentally establish bounds on how well steady-state entanglement can be realized between qubits that are fully disconnected, i.e., do not interact coherently with each other, and can be separated by arbitrary distances. To address this issue, this program investigates a so-called driven-dissipative scheme, where a pair of locally driven qubits radiate into a chiral waveguide, i.e., a waveguide in which photons can only propagate unidirectionally. In such a system, the qubits cannot interact coherently, but it has been theoretically proposed that they can be entangled in the steady state. This model will be realized using superconducting quantum circuits, which allow tailoring the system parameters to the appropriate regime, and where superconducting qubits may be combined with the synthesis of low-loss chirality using Josephson junction-based devices. Using this approach, the aim is to realize originally proposed models and use the newly developed hardware platform to both theoretically and experimentally establish bounds on the practically achievable amount of entanglement in such systems. Following this, research efforts will move beyond the two-qubit regime, and investigate how multi-qubit entanglement can be stabilized. This investigation will elucidate whether this approach to stabilize remote entanglement can be of utility for quantum networks or quantum processors. This research program will shed light on limits of quantum coherence that can be maintained in open systems, and will inform scaling strategies for quantum devices.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 06, 2025
- Source ID
- FA95502410354
Entities
People
- Wolfgang Pfaff
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Illinois Urbana–Champaign