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4 papers · 2 filters
Higher-order uncertainty bounds for mixed states
Alex J. Belfield, Dorje C. Brody
Uncertainty lower bounds for parameter estimations associated with a unitary family of mixed-state density matrices are obtained by embedding the space of density matrices in the H…
Quantum Measurement of Space-Time Events
Dorje C. Brody, Lane P. Hughston
The phase space of a relativistic system can be identified with the future tube of complexified Minkowski space. As well as a complex structure and a symplectic structure, the futu…
Rydberg Entangling Gates in Silicon
Eleanor Crane, Alexander Schuckert, Nguyen H. Le +1
In this paper, we propose a new Rydberg entangling gate scheme which we demonstrate theoretically to have an order of magnitude improvement in fidelities and speed over existing pr…
Driving-induced resonance narrowing in a strongly coupled cavity-qubit system
Eyal Buks, Paul Brookes, Eran Ginossar +4
We study a system consisting of a superconducting flux qubit strongly coupled to a microwave cavity. Externally applied qubit driving is employed in order to manipulate the spectru…