The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Eric R. Hudson - One of the best experts on this subject based on the ideXlab platform.
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Dipole-Phonon Quantum Logic with Trapped Polar Molecular Ions.
Physical review letters, 2020Co-Authors: Wesley C. Campbell, Eric R. HudsonAbstract:The interactIon between the electric dipole moment of a trapped Molecular Ion and the phonon modes of the confined Coulomb crystal couples the orientatIon of the molecule to its motIon. We consider the practical feasibility of harnessing this interactIon to initialize, process, and read out quantum informatIon encoded in Molecular Ion qubits without ever optically illuminating the molecules. We present two schemes wherein a Molecular Ion can be entangled with a cotrapped atomic Ion qubit, providing, among other things, a means for Molecular state preparatIon and measurement. We also show that virtual phonon exchange can significantly boost the range of the interMolecular dipole-dipole interactIon, allowing strong coupling between widely separated Molecular Ion qubits.
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Molecular-Ion trap-depletIon spectroscopy of BaCl +
Physical Review A, 2011Co-Authors: Kuang Chen, Steven J. Schowalter, Svetlana Kotochigova, Alexander Petrov, Wade G. Rellergert, Scott T. Sullivan, Eric R. HudsonAbstract:We demonstrate a simple technique for Molecular-Ion spectroscopy. BaCl${}^{+}$ Molecular Ions are trapped in a linear Paul trap in the presence of a room-temperature He buffer gas and photodissociated by driving an electronic transitIon from the ground $X {}^{1}{\ensuremath{\Sigma}}^{+}$ state to the repulsive wall of the $A {}^{1}\ensuremath{\Pi}$ state. The photodissociatIon spectrum is recorded by monitoring the induced trap loss of BaCl${}^{+}$ Ions as a functIon of excitatIon wavelength. Accurate Molecular potentials and spectroscopic constants are determined. A comparison of the theoretical photodissociatIon cross sectIons with the measurements shows excellent agreement. This study represents an important step toward the productIon of ultracold ground-state Molecular Ions.
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ProductIon of ultracold Molecular Ion
CLEO:2011 - Laser Applications to Photonic Applications, 2011Co-Authors: Kuang Chen, Steven J. Schowalter, Svetlana Kotochigova, Alexander Petrov, Wade G. Rellergert, Scott T. Sullivan, Eric R. HudsonAbstract:We present experimental data to produce ultracold, internal ground-state Molecular Ions via sympathetic cooling with ultracold atoms. Ultracold Molecular Ions find applicatIons in ultracold chemistry, precisIon measurement and quantum computatIon.
D Leibfried - One of the best experts on this subject based on the ideXlab platform.
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preparatIon and coherent manipulatIon of pure quantum states of a single Molecular Ion
Nature, 2017Co-Authors: Chinwen Chou, Christoph Kurz, Philipp N Plessow, D B Hume, David R Leibrandt, D LeibfriedAbstract:By exploiting a co-trapped Ca+ Ion, a single CaH+ Ion is prepared in pure quantum states, which are coherently manipulated, using a protocol that could easily be extended to other Molecular Ion species. Over the past decade, researchers have refined the art of cooling, trapping and manipulating atoms to perform precisIon measurements and to use them as quantum bits, or qubits. However, performing the same operatIons on molecules remains a challenge because their more complicated electronic structure makes them difficult to manipulate. Current methods involve complex procedures with many lasers. But trapped molecules and Molecular Ions could open exciting possibilities for quantum informatIon processing and precise measurements of fundamental constants. Here the authors establish a general protocol, exploiting a co-trapped atom to help to prepare and coherently manipulate single Molecular Ions using only one laser. The operatIons are demonstrated using a CaH+ Molecular Ion, but could be extended to other species. The authors expect that their techniques will enable trapping and manipulatIon of symmetric molecules such as H2+. Laser cooling and trapping of atoms and atomic Ions has led to advances including the observatIon of exotic phases of matter1,2, the development of precisIon sensors3 and state-of-the-art atomic clocks4. The same level of control in molecules could also lead to important developments such as controlled chemical reactIons and sensitive probes of fundamental theories5, but the vibratIonal and rotatIonal degrees of freedom in molecules pose a challenge for controlling their quantum mechanical states. Here we use quantum-logic spectroscopy6, which maps quantum informatIon between two Ion species, to prepare and non-destructively detect quantum mechanical states in Molecular Ions7. We develop a general technique for optical pumping and preparatIon of the molecule into a pure initial state. This enables us to observe high-resolutIon spectra in a single Ion (CaH+) and coherent phenomena such as Rabi flopping and Ramsey fringes. The protocol requires a single, far-off-resonant laser that is not specific to the molecule, so many other Molecular Ions, including polyatomic species, could be treated using the same methods in the same apparatus by changing the Molecular source. Combined with the long interrogatIon times afforded by Ion traps, a broad range of Molecular Ions could be studied with unprecedented control and precisIon. Our technique thus represents a critical step towards applicatIons such as precisIon Molecular spectroscopy, stringent tests of fundamental physics, quantum computing and precisIon control of Molecular dynamics8.
Isaac L. Chuang - One of the best experts on this subject based on the ideXlab platform.
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Microwave quantum logic spectroscopy and control of Molecular Ions
New Journal of Physics, 2013Co-Authors: Molu Shi, Michael Drewsen, Peter F. Herskind, Isaac L. ChuangAbstract:A general method for rotatIonal microwave spectroscopy and control of polar Molecular Ions via direct microwave addressing is considered. Our method makes use of spatially varying ac Stark shifts, induced by far off- resonant, focused laser beams to achieve an effective coupling between the rotatIonal state of a Molecular Ion and the electronic state of an atomic Ion. In this setting, the atomic Ion is used for read-out of the Molecular Ion state, in a manner analogous to quantum logic spectroscopy based on Raman transitIons. In additIon to high-precisIon spectroscopy, this setting allows for rotatIonal ground state cooling, and can be considered as a candidate for the quantum informatIon processing with polar Molecular Ions. All elements of our proposal can be realized with currently available technology.
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Cavity QED in a Molecular Ion trap
Physical Review A, 2011Co-Authors: David Schuster, Lev S. Bishop, Isaac L. Chuang, David Demille, Robert SchoelkopfAbstract:We propose a class of experiments using rotatIonal states of dipolar Molecular Ions trapped near an on-chip superconducting microwave cavity. Molecular Ions have several advantages over neutral molecules for such cavity quantum electrodynamics experiments. In particular, Ions can be loaded easily into deep rf traps and are held independent of their internal state. An analysis of the detectIon efficiency for, and coherence properties of, the Molecular Ions is presented. We discuss approaches for manipulating quantum informatIon and performing high-resolutIon rotatIonal spectroscopy using this system.
David R Leibrandt - One of the best experts on this subject based on the ideXlab platform.
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preparatIon and coherent manipulatIon of pure quantum states of a single Molecular Ion
Nature, 2017Co-Authors: Chinwen Chou, Christoph Kurz, Philipp N Plessow, D B Hume, David R Leibrandt, D LeibfriedAbstract:By exploiting a co-trapped Ca+ Ion, a single CaH+ Ion is prepared in pure quantum states, which are coherently manipulated, using a protocol that could easily be extended to other Molecular Ion species. Over the past decade, researchers have refined the art of cooling, trapping and manipulating atoms to perform precisIon measurements and to use them as quantum bits, or qubits. However, performing the same operatIons on molecules remains a challenge because their more complicated electronic structure makes them difficult to manipulate. Current methods involve complex procedures with many lasers. But trapped molecules and Molecular Ions could open exciting possibilities for quantum informatIon processing and precise measurements of fundamental constants. Here the authors establish a general protocol, exploiting a co-trapped atom to help to prepare and coherently manipulate single Molecular Ions using only one laser. The operatIons are demonstrated using a CaH+ Molecular Ion, but could be extended to other species. The authors expect that their techniques will enable trapping and manipulatIon of symmetric molecules such as H2+. Laser cooling and trapping of atoms and atomic Ions has led to advances including the observatIon of exotic phases of matter1,2, the development of precisIon sensors3 and state-of-the-art atomic clocks4. The same level of control in molecules could also lead to important developments such as controlled chemical reactIons and sensitive probes of fundamental theories5, but the vibratIonal and rotatIonal degrees of freedom in molecules pose a challenge for controlling their quantum mechanical states. Here we use quantum-logic spectroscopy6, which maps quantum informatIon between two Ion species, to prepare and non-destructively detect quantum mechanical states in Molecular Ions7. We develop a general technique for optical pumping and preparatIon of the molecule into a pure initial state. This enables us to observe high-resolutIon spectra in a single Ion (CaH+) and coherent phenomena such as Rabi flopping and Ramsey fringes. The protocol requires a single, far-off-resonant laser that is not specific to the molecule, so many other Molecular Ions, including polyatomic species, could be treated using the same methods in the same apparatus by changing the Molecular source. Combined with the long interrogatIon times afforded by Ion traps, a broad range of Molecular Ions could be studied with unprecedented control and precisIon. Our technique thus represents a critical step towards applicatIons such as precisIon Molecular spectroscopy, stringent tests of fundamental physics, quantum computing and precisIon control of Molecular dynamics8.
Chinwen Chou - One of the best experts on this subject based on the ideXlab platform.
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frequency comb spectroscopy on pure quantum states of a single Molecular Ion
Science, 2020Co-Authors: Chinwen Chou, Alejandra Collopy, Christoph Kurz, Yiheng Lin, Michael E Harding, Philipp N Plessow, Tara M Fortier, Scott A DiddamsAbstract:Spectroscopy is a powerful tool for studying molecules and is commonly performed on large thermal Molecular ensembles that are perturbed by motIonal shifts and interactIons with the environment and one another, resulting in convoluted spectra and limited resolutIon. Here, we use quantum-logic techniques to prepare a trapped Molecular Ion in a single quantum state, drive terahertz rotatIonal transitIons with an optical frequency comb, and read out the final state nondestructively, leaving the molecule ready for further manipulatIon. We can resolve rotatIonal transitIons to 11 significant digits and derive the rotatIonal constant of 40CaH+ to be BR = 142 501 777.9(1.7) kilohertz. Our approach is suited for a wide range of Molecular Ions, including polyatomics and species relevant for tests of fundamental physics, chemistry, and astrophysics.
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preparatIon and coherent manipulatIon of pure quantum states of a single Molecular Ion
Nature, 2017Co-Authors: Chinwen Chou, Christoph Kurz, Philipp N Plessow, D B Hume, David R Leibrandt, D LeibfriedAbstract:By exploiting a co-trapped Ca+ Ion, a single CaH+ Ion is prepared in pure quantum states, which are coherently manipulated, using a protocol that could easily be extended to other Molecular Ion species. Over the past decade, researchers have refined the art of cooling, trapping and manipulating atoms to perform precisIon measurements and to use them as quantum bits, or qubits. However, performing the same operatIons on molecules remains a challenge because their more complicated electronic structure makes them difficult to manipulate. Current methods involve complex procedures with many lasers. But trapped molecules and Molecular Ions could open exciting possibilities for quantum informatIon processing and precise measurements of fundamental constants. Here the authors establish a general protocol, exploiting a co-trapped atom to help to prepare and coherently manipulate single Molecular Ions using only one laser. The operatIons are demonstrated using a CaH+ Molecular Ion, but could be extended to other species. The authors expect that their techniques will enable trapping and manipulatIon of symmetric molecules such as H2+. Laser cooling and trapping of atoms and atomic Ions has led to advances including the observatIon of exotic phases of matter1,2, the development of precisIon sensors3 and state-of-the-art atomic clocks4. The same level of control in molecules could also lead to important developments such as controlled chemical reactIons and sensitive probes of fundamental theories5, but the vibratIonal and rotatIonal degrees of freedom in molecules pose a challenge for controlling their quantum mechanical states. Here we use quantum-logic spectroscopy6, which maps quantum informatIon between two Ion species, to prepare and non-destructively detect quantum mechanical states in Molecular Ions7. We develop a general technique for optical pumping and preparatIon of the molecule into a pure initial state. This enables us to observe high-resolutIon spectra in a single Ion (CaH+) and coherent phenomena such as Rabi flopping and Ramsey fringes. The protocol requires a single, far-off-resonant laser that is not specific to the molecule, so many other Molecular Ions, including polyatomic species, could be treated using the same methods in the same apparatus by changing the Molecular source. Combined with the long interrogatIon times afforded by Ion traps, a broad range of Molecular Ions could be studied with unprecedented control and precisIon. Our technique thus represents a critical step towards applicatIons such as precisIon Molecular spectroscopy, stringent tests of fundamental physics, quantum computing and precisIon control of Molecular dynamics8.