Search Results - "Mølmer, Klaus"

Input-Output Theory with Quantum Pulses by Kiilerich, Alexander Holm, Mølmer, Klaus

“…We present a formalism that accounts for the interaction of a local quantum system, such as an atom or a cavity, with traveling pulses of quantized radiation…”
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Fast Multiqubit Gates by Adiabatic Evolution in Interacting Excited-State Manifolds of Rydberg Atoms and Superconducting Circuits by Khazali, Mohammadsadegh, Mølmer, Klaus

“…Quantum computing and quantum simulation can be implemented by concatenation of one- and two-qubit gates and interactions. For most physical implementations,…”
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Theory of Subradiant States of a One-Dimensional Two-Level Atom Chain by Zhang, Yu-Xiang, Mølmer, Klaus

“…Recently, the subradiant states of one-dimensional two-level atom chains coupled to light modes were found to have decay rates obeying a universal scaling, and…”
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More speed out of the quantum gate by Mølmer, Klaus

“…Quantum gates on trapped ions may be quicker and more reliable owing to squeezing of their vibrational motion. A threefold drop in operation time shows…”
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Deterministic Free-Space Source of Single Photons Using Rydberg Atoms by Petrosyan, David, Mølmer, Klaus

“…We propose an efficient free-space scheme to create single photons in a well-defined spatiotemporal mode. To that end, we first prepare a single source atom in…”
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Subradiant Emission from Regular Atomic Arrays: Universal Scaling of Decay Rates from the Generalized Bloch Theorem by Zhang, Yu-Xiang, Mølmer, Klaus

“…The Hermitian part of the field-mediated dipole-dipole interaction in infinite periodic arrays of two-level atoms yields an energy band of the singly excited…”
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Fisher information and the quantum Cramér-Rao sensitivity limit of continuous measurements by Gammelmark, Søren, Mølmer, Klaus

“…Precision measurements with quantum systems rely on our ability to trace the differences between experimental signals to variations in unknown physical…”
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Past quantum states of a monitored system by Gammelmark, Søren, Julsgaard, Brian, Mølmer, Klaus

“…A density matrix ρ(t) yields probabilistic information about the outcome of measurements on a quantum system. We introduce here the past quantum state, which,…”
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Hypothesis testing with open quantum systems by Molmer, Klaus

“…Using a quantum circuit model we derive the maximal ability to distinguish which of several candidate Hamiltonians describe an open quantum system. This…”
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Ultranarrow Superradiant Lasing by Dark Atom-Photon Dressed States by Zhang, Yuan, Shan, Chongxin, Mølmer, Klaus

“…We show that incoherent pumping of an optical lattice clock system with ultracold strontium-88 atoms produces laser light with a ≃10  Hz linewidth when the…”
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Binding potentials and interaction gates between microwave-dressed Rydberg atoms by Petrosyan, David, Mølmer, Klaus

“…We demonstrate finite range binding potentials between pairs of Rydberg atoms interacting with each other via attractive and repulsive van der Waals potentials…”
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Quantum memory for microwave photons in an inhomogeneously broadened spin ensemble by Julsgaard, Brian, Grezes, Cécile, Bertet, Patrice, Mølmer, Klaus

“…We propose a multimode quantum memory protocol able to store the quantum state of the field in a microwave resonator into an ensemble of electronic spins. The…”
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Bayesian parameter inference from continuously monitored quantum systems by Gammelmark, Søren, Mølmer, Klaus

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Stringent and efficient assessment of boson-sampling devices by Tichy, Malte C, Mayer, Klaus, Buchleitner, Andreas, Mølmer, Klaus

“…Boson sampling holds the potential to experimentally falsify the extended Church-Turing thesis. The computational hardness of boson sampling, however,…”
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Quantum Nondemolition Measurements of Moving Target States by Andersen, Anton L., Mølmer, Klaus

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Deterministic Photon Sorting in Waveguide QED Systems by Yang, Fan, Lund, Mads M, Pohl, Thomas, Lodahl, Peter, Mølmer, Klaus

“…Sorting quantum fields into different modes according to their Fock-space quantum numbers is a highly desirable quantum operation. In this Letter, we show that…”
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Free-Fermion Multiply Excited Eigenstates and Their Experimental Signatures in 1D Arrays of Two-Level Atoms by Zhang, Yu-Xiang, Mølmer, Klaus

“…One-dimensional (1D) subwavelength atom arrays display multiply excited subradiant eigenstates which are reminiscent of free fermions. So far, these states…”
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Microwave to optical conversion with atoms on a superconducting chip by Petrosyan, David, Mølmer, Klaus, Fortágh, József, Saffman, Mark

“…We describe a scheme to coherently convert a microwave photon of a superconducting co-planar waveguide resonator to an optical photon emitted into a…”
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Active Frequency Measurement on Superradiant Strontium Clock Transitions by Zhang, Yuan, Shan, Chongxin, Mølmer, Klaus

“…We develop a stochastic mean-field theory to describe active frequency measurements of pulsed superradiant emission, studied in a recent experiment with…”
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Subradiant bound dimer excited states of emitter chains coupled to a one dimensional waveguide by Zhang, Yu-Xiang, Yu, Chuan, Mølmer, Klaus

“…This article shows that chains of optical or microwave emitters coupled to a one-dimensional (1D) waveguide support subradiant states with close pairs of…”
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