Blake Morell Daniel Bowser Trenton Wood

Contents Background Experimental Design & Outcome Implications Future Applications

Quantum Mechanics Overview All matter is constantly vibrating. This vibrating produces characteristic electromagnetic radiation. Atoms can only be in certain energy states. From atom EM emissions, energy changes on the atomic level can be recorded.

Wave functions Observed matter can be defined in wave functions. Interacting atoms will have differing wave functions Variables: Number of interacting species Distance Size Etc Fall-2002

Dependence Atoms constantly “talk” to one another. Neighboring matter changes the wave function. Introduces broad theory and speculation. does-earths-magnetic-field-flip/

Quantum Entanglement Spooky action at a distance” – Einstein Once entangled two photons would keep an orthogonal spin with respect to the other. Thus one atom can be affected by the other without distance as a factor. -action-distance.html

Basic Idea Teleportation of information B and C are entangled Interaction with A on B will affect C portation-quantum-entanglement/

Quantum Teleport Record Photons entangled 143 km apart Disturbed photon on La Palma influence photon on Tenerife. Weather was a challenge. Distance equivalent to satellites transmission distance. science/esa-observatory-breaks-world-quantum- teleportation-record

Experimental Goals To successfully entangle two macroscopically distant atoms To "herald" the entangled state of these two atoms "Heralding" is a separate signal transmission that announces the successful entanglement Verifies that the entanglement has occurred

Experimental Design Two atoms are trapped separately in optical tweezers and excited by a laser Two photons are emitted, each entangled with the source atom These photons are guided to a device where a Bell-state measurement is performed Once the photons are detected in a Bell state, they are entangled A signal heralds the entanglement of the two atoms

Experimental Design

Experimental Requirements Two photons must be indistinguishable Photons must reach the detector simultaneously  sub-nanosecond timing of photon emission Fluctuations of photon polarization had to be accounted for

Future Applications Quantum Computing Qubits Photons, trapped atoms or ions Parallel computing Simulate: economics, climate, engineering M. Simmons. TEDxSydney 2012, Quantum Computation. Sydney, Australia, May 26, 2012.

Future Applications Quantum Computing Traveling Salesman Problem Cryptography RSA Encryption M. Simmons. TEDxSydney 2012, Quantum Computation. Sydney, Australia, May 26, 2012.

Future Applications Quantum Teleportation Bell State Bell Basis Measurement Recovery Information Measurement A B

Future Challenges Reduce decay time of atoms Advanced measurements to differentiate between all four Bells states Improved Error correction Currently as error correction increases, accuacy decreases Develop accurate quantum gates Increase number of qubits available for computing

References M. Simmons. TEDxSydney 2012, Quantum Computation. Sydney, Australia, May 26, —4- —5- —6- —7 - —8- record