Available Technology

FAST ENTANGLED STATE GENERATION AND QUANTUM INFORMATION TRANSFER IN QUANTUM SYSTEMS WITH LONG-RANGE INTERACTIONS

NIST has created a method to use quantum systems with long-range interactions to do the following two things faster (in some cases exponentially faster) than in systems with short-range interactions: (1) accomplish quantum state transfer across the system; (2) prepare a large variety of entangled states with applications to metrology and quantum computing. This method makes use of individual control of all participating quantum bits and takes advantage of long-range interactions in such a way that many interaction pathways coherently and constructively interfere to provide the speed-up.

Patent Abstract: 

Fast Entangled State Generation and Quantum Information Transfer in Quantum Systems with Long-Range Interactions
A process for generating an entangled state of a plurality of particles includes: providing the plurality of particles, the plurality of particles interacting via long range interactions; producing a first entangled state in a first particle; entangling the first particle with a second particle to form a second entangled state, wherein particles that are not in the second entangled state are remaining particles; and proceeding, starting with the second entangled state, to propagate entanglement in a logarithmic progression through the remaining particles in a recursive manner, to produce an intermediate entangled state, such that the intermediate entangled state acts as an initial entangled state for a next iteration, until a final entangled state is formed to generate the entangled state of the particles.

Benefits 

It speeds up a wide range of quantum computer algorithms as well as speeding up the preparation of a wide range of entangled states, including magnetometry and thermometry with defects in diamond (A diamond is a different form of carbon. The carbon atoms in diamonds are arranged in a strong structure. It is the hardest natural material known.

Inventors: 

Alexey V. Gorshkov, Michael Foss-Feig, Zachary Eldredge, Zhe-Xuan Gong, Ali Hamed Moosavian, and Jeremy T. Young

Patent Number: 
10,432,320
Technology Type(s): 
Information Technology, Cyber security, Cyber Security/Information Assurance, Quantum Physics, and Quantum Processes and Metrology
Internal Laboratory Ref #: 
17-003
Patent Issue Date: 
October 1, 2019
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