Research Interests The developing field of ultracold atomic physics provides tantalizing opportunities for exploring physical phenomena in a regime that has heretofore been inaccessible:
He is an experimentalist who uses ultracold atomic gases to explore fundamental phenomena in condensed-matter physics, atomic physics, and quantum optics. The coherence time of the stored quantum bit outlasts milliseconds and therefore matches the requirement for the creation of a global quantum network in which qubits are directly teleported between end nodes.
Nature Photonics, 11 December Light is an ideal carrier for quantum information encoded on single photons, but transfer over long distances is inefficient and unreliable due to losses.
Direct teleportation between the end nodes of a network can be utilized to prevent the loss of precious quantum bits. However, the quantum bit may be rotated when it reaches the receiver and hence has to be reverted.
To this end, the necessary information has to be classically communicated from sender to receiver.
This takes a certain amount of time, during which the qubit has to be preserved at the receiver. Considering two network nodes at the most distant places on earth, this corresponds to a time span of 66 milliseconds.
The atom is placed in the centre of an optical cavity which is formed by two high-finesse mirrors and hold in place by standing light waves. A single photon which carries the quantum bit in a coherent superposition of two polarization states starts to strongly interact with the single atom once it is sent into the resonator.
Ultimately, the photon is absorbed by the atom and the quantum bit is transferred into a coherent superposition of two atomic states. The challenge is to maintain the atomic superposition as long as possible.
In former experiments, the storage time was limited to a few hundreds of microseconds. Unfortunately, in real-world experiments, this phase relation is lost over time mostly due to interaction with fluctuating ambient magnetic fields. Once the information is transferred from the photon to the atom, the population of one atomic state is coherently transferred to another state.
This is done by using a pair of laser beams to induce a Raman transition. In this new configuration, the stored qubit is times less sensitive to magnetic field fluctuations.
Before the retrieval of the stored photonic quantum bit, the Raman transition is reversed. This means, that the mere transfer of the atomic qubit to a less sensitive state configuration extends the coherence time by a factor of Here, the population of the two atomic states used for storage is swapped in the middle of the storage time.
His research topics range from fundamental mathematical calculations in quantum information theory, modelling of quantum many-body systems to concepts for the implementation of quantum optical systems.
Cirac will receive the prize — a handwritten certificate on parchment with the wording of the eulogy, and a gold medal bearing a portrait of Max Planck —at an award ceremony on 7 March on the occasion of the annual meeting of the DPG in Erlangen.
A strong focus of Prof.On their Allocation Year ERCAP Request Forms Principal Investigators reported 1, refereed publications (published or in press) - as well as publications submitted to refereed journals - for the preceding 12 months, based on using, at least in part, NERSC resources.
We discuss the mechanisms of unconventional superconductivity and superfluidity in 3D and 2D fermionic systems with purely repulsive interaction at low densities. We construct phase diagrams of these systems and find the areas of the superconducting state in free space, as well as on the lattice in. (in press) Subj-class: Superconductivity; Strongly Correlated Electrons \\ \\ Paper: cond-mat/ From: Kravtsov Vladimir >kravtsov(at)r-bridal.com Date: Wed, 13 Jun GMT (59kb) Date (revised v2): Thu, 14 Jun GMT (59kb) Date (revised v3): Sun, 24 Jun GMT (59kb) Title: Time-reversal symmetry. Download as PDF, TXT or read online from Scribd. Flag for inappropriate content. Descarga.
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Advances in ATOMIC, MOLECULAR, AND OPTICAL PHYSICS V O L U M E 52 Editors PAUL R.
Thermometry and Cooling of Ultracold Atoms in an Optical Lattice by This thesis describes experimental work performed in BEC IV, also known as Rubidium lab, as it is the only one of the machines in the Ketterle-Pritchard group to work with 87 Rb. While all of the current research efforts in the Rubidium lab (and all the. Author(s): Marti, George Edward | Advisor(s): Stamper-Kurn, Dan M | Abstract: At low temperatures, the thermodynamic properties of a many-body system are determined by the low energy excursions from the ground state. In quantum degenerate rubidium, the low energy excitations are phonons—phase and density modes—and magnons—spin modes. This thesis reports on the construction of an. Brotherhood invisible man essay best gre essay samples dan stamper kurn thesis bisiness plan essay defining race and ethinicity. My ambition essay dentist essay about organizational behaviour cycles in biology essay plan example of how to write a good essay english reflective essay topics.
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