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Quantum information with rydberg atoms
 Rev. Mod. Phys
, 2010
"... Rydberg atoms with principal quantum number n1 have exaggerated atomic properties including dipoledipole interactions that scale as n4 and radiative lifetimes that scale as n3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qubits. ..."
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Cited by 42 (2 self)
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Rydberg atoms with principal quantum number n1 have exaggerated atomic properties including dipoledipole interactions that scale as n4 and radiative lifetimes that scale as n3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qubits. The availability of a strong longrange interaction that can be coherently turned on and off is an enabling resource for a wide range of quantum information tasks stretching far beyond the original gate proposal. Rydberg enabled capabilities include longrange twoqubit gates, collective encoding of multiqubit registers, implementation of robust lightatom quantum interfaces, and the potential for simulating quantum manybody physics. The advances of the last decade are reviewed, covering both theoretical and experimental aspects of Rydbergmediated quantum information processing.
Discrete Cosine Transforms on Quantum Computers
 PROCEEDINGS OF THE 2ND INTERNATIONAL SYMPOSIUM ON IMAGE AND SIGNAL PROCESSING AND ANALYSIS
, 2001
"... A classical computer does not allow to calculate a discrete cosine transform on N points in less than linear time. This trivial lower bound is no longer valid for a computer that takes advantage of quantum mechanical superposition, entanglement, and interference principles. In fact, we show that it ..."
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Cited by 10 (2 self)
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A classical computer does not allow to calculate a discrete cosine transform on N points in less than linear time. This trivial lower bound is no longer valid for a computer that takes advantage of quantum mechanical superposition, entanglement, and interference principles. In fact, we show that it is possible to realize the discrete cosine transforms and the discrete sine transforms of size N N and types I,II,III, and IV with as little as O(log 2 N) operations on a quantum computer, whereas the known fast algorithms on a classical computer need O(N log N) operations.
THE COHERENT OPTICAL SPECTROSCOPY AND CON TROL OF AN ELECTRON SPIN IN A SELFASSEMBLED QUAN TUM DOT FOR QUANTUM COMPUTING
, 2009
"... To my grandfather and my parents ii ACKNOWLEDGEMENTS A few years ago I didn’t think this thesis would be written. Having gone through a nearly year and a half span of failed experiments, I was beginning to consider other possible career options. I believe that God, by both ordinary and extraordinary ..."
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To my grandfather and my parents ii ACKNOWLEDGEMENTS A few years ago I didn’t think this thesis would be written. Having gone through a nearly year and a half span of failed experiments, I was beginning to consider other possible career options. I believe that God, by both ordinary and extraordinary means, provided the inspiration and the guidance I needed to stay the course, bringing me to eventual (and undeserved) success in the laboratory. Such inspiration and guidance has come through family members, colleagues and friends, as well as through moments such as those of Saturday, March 31, 2007 when, at around 3am, I was strangely motivated to repeat a failed set of scans despite being almost out of liquid helium, discouraged by what seemed to be another day of failure, and exhausted from having woken up early for the previous day’s 8 am group meeting. That moment would turn out to produce the first significant step of progress in lab, and, thankfully, it wouldn’t be the last.
Contents
, 2009
"... Rydberg atoms with principal quantum number n ≫ 1 have exaggerated atomic properties including dipoledipole interactions that scale as n 4 and radiative lifetimes that scale as n 3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qu ..."
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Rydberg atoms with principal quantum number n ≫ 1 have exaggerated atomic properties including dipoledipole interactions that scale as n 4 and radiative lifetimes that scale as n 3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qubits. The availability of a strong, longrange interaction that can be coherently
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"... EPJ manuscript No. (will be inserted by the editor) Light with orbital angular momentum interacting with trapped ions ..."
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EPJ manuscript No. (will be inserted by the editor) Light with orbital angular momentum interacting with trapped ions
Strontium88 Ion Trapping
, 2012
"... Energy levels of the valence electron of a single trapped "SSr+ ion can be harnessed as an effective qubit for quantum information processing. The qubit transition to a metastable energy state can be stimulated by a laser at a frequency of 444.779044 THz. A laser beam with higher intensity caus ..."
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Energy levels of the valence electron of a single trapped "SSr+ ion can be harnessed as an effective qubit for quantum information processing. The qubit transition to a metastable energy state can be stimulated by a laser at a frequency of 444.779044 THz. A laser beam with higher intensity causes more rapid transitions between quantum states, and thus allows more computational operations within the coherence time of the system. The focus of this thesis is the design and construction of a more powerful laser to stimulate the qubit transition of the 88Sr+ ion, using injectionlocking to stabilize the frequency of the new laser. Injectionlocking is a technique for using an existing, stable laser to control the frequency of a second laser diode. A small amount of input power is enough to produce a much more powerful output beam at the same frequency, so the system acts as an amplifier. We found that a AlGaInP laser diode required 9 ± 2 pW of injected input power to lock to the input frequency, producing an output power of 11.56 i 0.31 mW. The ratio of input to output power was (7.8 ± 1.7) x104. The
Synchronization and Sensing with Steady State Superradiance and Spin Squeezing
, 2015
"... The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. iii ..."
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The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. iii