Quantum universal detectors

Tomography of quantum detectors

Measurement connects the world of quantum phenomena to the world of classical events. It has both a passive role—in observing quantum systems—and an active one, in preparing quantum states and controlling them. In view of the central status of measurement in quantum mechanics, it is surprising that there is no general recipe for designing a detector that measures a given observable1. Compoundin...

Quantum Dot Composite Radiation Detectors

Universal quantum mechanics

If gravity respects quantum mechanics, it is important to identify the essential postulates of a quantum framework capable of incorporating gravitational phenomena. Such a construct likely requires elimination or modification of some of the “standard” postulates of quantum mechanics, in particular those involving time and measurement. This paper proposes a framework that appears sufficiently ge...

Inter-universal Quantum Entanglement

The boundary conditions to be imposed on the quantum state of the whole multiverse could be such that the universes would be created in entangled pairs. Then, interuniversal entanglement would provide us with a vacuum energy for each single universe that might be fitted with observational data, making testable not only the multiverse proposal but also the boundary conditions of the multiverse. ...

Universal quantum interfaces

Seth Lloyd,* Andrew J. Landahl, and Jean-Jacques E. Slotine d’Arbeloff Laboratory for Information Systems and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Center for Bits and Atoms, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA HP Labs, Palo Alto, California 94304-1126, USA Nonlinear Systems Laboratory, Massachusetts Institu...