Christopher T Monroe

US Patent:

7411187, Aug 12, 2008

Filed:

May 23, 2006

Appl. No.:

11/419955

Inventors:

Christopher Monroe - Ann Arbor MI, US
Daniel Stick - Ann Arbor MI, US
Martin Madsen - Ann Arbor MI, US
Winfried Hensinger - Ann Arbor MI, US
Keith Schwab - Ithaca NY, US

Assignee:

The Regents of the University of Michigan - Ann Arbor MI

International Classification:

B01D 59/44

US Classification:

250290, 250281, 250282, 250283, 250288, 250214 R, 250207, 257 14, 257 12, 257 13, 257 15, 257 17, 257 31, 257 33, 703 11, 708403, 708191, 700 1, 706 14, 706 12, 706 45, 709201, 435 6, 4352872, 712 34

Abstract:

A micrometer-scale ion trap, fabricated on a monolithic chip using semiconductor micro-electromechanical systems (MEMS) technology. A single 111Cd+ ion is confined, laser cooled, and the heating measured in an integrated radiofrequency trap etched from a doped gallium arsenide (GaAs) heterostructure. Single 111Cd+ qubit ions are confined in a radiofrequency linear ion trap on a semiconductor chip by applying a combination of static and oscillating electric potentials to integrated electrodes. The electrodes are lithographically patterned from a monolithic semiconductor substrate, eliminating the need for manual assembly and alignment of individual electrodes. The scaling of this structure to hundreds or thousands of electrodes is possible with existing semiconductor fabrication technology.

US Patent:

7518120, Apr 14, 2009

Filed:

Jan 3, 2006

Appl. No.:

11/324366

Inventors:

Christopher Monroe - Dexter MI, US
Boris Blinov - Seattle WA, US
David Moehring - Ann Arbor MI, US
Luming Duan - Ann Arbor MI, US

Assignee:

The Regents of the University of Michigan - Ann Arbor MI

International Classification:

H04B 10/02
G06F 15/00

US Classification:

250393, 250395, 398173, 398183, 712 1

Abstract:

Methods and apparatus for long-distance quantum communication and scalable quantum computation are disclosed. The methods and apparatus are based on probabilistic ion-photon mapping. Scalable quantum computation is achieved by forming deterministic quantum gates between remotely located trapped ions by detecting spontaneously emitted photons, accompanied by local Coulomb interaction between neighboring ions. Long-distance quantum communication and scalable quantum communication networks formed by employing a number of remote nodes that each include an ion trap and by employing probabilistic photon-mediated entanglement between the ions in each ion trap.