Publisher’s Note: Label-Free Bond-Selective Imaging by Listening to Vibrationally Excited Molecules [Phys. Rev. Lett.<b>106</b>, 238106 (2011)]

Wang, Han Wei; Chai, Ning; Wang, Pu; Hu, S.; Dou, Wei; Umulis, David M.; Wang, Lihong V.; Sturek, Michael; Lucht, Robert P.; Cheng, Ji

doi:10.1103/physrevlett.106.259901

Cited by 52 publications

(88 citation statements)

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“…On the other hand, in states |x and |y , the cavity modes are in nonmaximally entangled states and the atoms are in factorized states. This shows that purely atomic entangled states can be transferred or converted into purely photonic N = 1 NOON states [7,[42][43][44][45].…”

Section: A Transfer Mediated By Atomsmentioning

confidence: 99%

“…Several features of the dynamically evolving states (59) and (60) are worth noting. One can see that state |w is a product state of a single-excitation entangled state of the atoms and the antisymmetric N = 1 NOON state of the cavity modes [7,[42][43][44][45]. State |q is a product state of the atomic state in which both atoms are in their ground states and the cavity modes being in the antisymmetric N = 2 NOON state.…”

Section: Coupled Jaynes-cummings Systemsmentioning

confidence: 99%

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Atoms versus photons as carriers of quantum states

Bougouffa

Ficek

2013

Phys. Rev. A

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The problem of the complete transfer of quantum states and entanglement in a four-qubit system composed of two single-mode cavities and two two-level atoms is investigated. The transfer of single and double excitation states is discussed for two different coupling configurations between the qubits. In the first, the coupling is mediated by the atoms that simultaneously couple to the cavity modes. In the second configuration, each atom resides inside one of the cavities and the coupling between the cavities is mediated by the overlapping field modes. A proper choice of basis states makes it possible to identify states that could be completely transferred between themselves. Simple expressions are derived for the conditions for the complete transfer of quantum states and entanglement. These conditions impose severe constraints on the evolution of the system in the form of constants of motion. The constrains on the evolution of the system imply that not all states can evolve in time, and we find that the evolution of the entire system can be confined into that occurring among two states only. Detailed analysis show that in the case where the interaction is mediated by the atoms, only symmetric superposition states can be completely and reversibly transferred between the atoms and the cavity modes. In the case where the interaction is mediated by the overlapping field modes, both symmetric and antisymmetric superposition states can be completely transferred. We also show that the system is capable of generating purely photonic NOON states, but only if the coupling is mediated by the atoms, and demonstrate that the ability to generate the NOON states relies on perfect transfer of an entanglement from the atoms to the cavity modes.

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Section: A Transfer Mediated By Atomsmentioning

confidence: 99%

Section: Coupled Jaynes-cummings Systemsmentioning

confidence: 99%

Atoms versus photons as carriers of quantum states

Bougouffa

Ficek

2013

Phys. Rev. A

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“…In this study we repot on fabrication and characterization of InAs DNW junctions, where a quantum dot is formed in each NW, and evaluated the gate performances. The DNW devices are useful for making multiple spin qubits and topological circuits of non-local entangled electrons [15][16][17][18][19] or parafermions as well as majorana fermions 20 . We develop a fabrication technique for selectively placing DNW onto previously fabricated gate arrays and selectively contacting the two NWs.…”

Section: Textmentioning

confidence: 99%

Gate tunable parallel double quantum dots in InAs double-nanowire devices

Baba

Matsuo

Kamata

et al. 2017

Applied Physics Letters

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We report fabrication and measurement of a device where closely-placed two parallel InAs nanowires (NWs) are contacted by source and drain normal metal electrodes. Established technique includes selective deposition of double nanowires onto a previously defined gate region. By tuning the junction with the finger bottom gates, we confirmed the formation of parallel double quantum dots, one in each NW, with a finite electrostatic coupling between each other.With the fabrication technique established in this study, devices proposed for more advanced experiments, such as Cooper-pair splitting and the observation of parafermions, can be realized.

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“…Pulses are applied during the gate operation, in a decouple while compute strategy. We consider DD sequences currently available in the labs and conveniently exploited with superconducting qubits [37][38][39][40][41] , namely the periodic DD (PDD) 17,18 , Carr-Purcell (CP) 56 , CarrPurcell-Meiboom-Gill (CPMG) 57 and Uhrig DD (UDD) sequences 58 . This choice is attractive since it is based on standard, simple sequences already experimentally available.…”

Section: Introductionmentioning

confidence: 99%

“…Improvement against 1/f noise in single-qubit gates via DD [19][20][21][22][23][24][25][26] , composite pulses [27][28][29][30] , dynamically corrected gates 30,31 and quantum optimal control 32,33 , has been demonstrated. In superconducting qubits pulsed control has been exploited to reduce dephasing due to charge-and magnetic fluxnoise 8,[34][35][36][37][38][39][40][41] . Recently DD of pure dephasing due to quadratic coupling to Gaussian distributed 1/f α noise has been used as a tool for noise spectroscopy 42 .…”

Section: Introductionmentioning

confidence: 99%

High-fidelity two-qubit gates via dynamical decoupling of local1/fnoise at the optimal point

D’Arrigo¹,

Falci²,

Paladino³

2016

Phys. Rev. A

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We investigate the possibility to achieve high-fidelity universal two-qubit gates by supplementing optimal tuning of individual qubits with dynamical decoupling (DD) of local 1/f noise. We consider simultaneous local pulse sequences applied during the gate operation and compare the efficiencies of periodic, Carr-Purcell and Uhrig DD with hard π-pulses along two directions (π z/y pulses). We present analytical perturbative results (Magnus expansion) in the quasi-static noise approximation combined with numerical simulations for realistic 1/f noise spectra. The gate efficiency is studied as a function of the gate duration, of the number n of pulses, and of the high-frequency roll-off. We find that the gate error is non-monotonic in n, decreasing as n −α in the asymptotic limit, α ≥ 2 depending on the DD sequence. In this limit πz-Urhig is the most efficient scheme for quasi-static 1/f noise, but it is highly sensitive to the soft UV-cutoff. For small number of pulses, πz control yields anti-Zeno behavior, whereas πy pulses minimize the error for a finite n. For the current noise figures in superconducting qubits, two-qubit gate errors ∼ 10 −6 , meeting the requirements for fault-tolerant quantum computation, can be achieved. The Carr-Purcell-Meiboom-Gill sequence is the most efficient procedure, stable for 1/f noise with UV-cutoff up to gigahertz.

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Publisher’s Note: Label-Free Bond-Selective Imaging by Listening to Vibrationally Excited Molecules [Phys. Rev. Lett.106, 238106 (2011)]

Cited by 52 publications

References 0 publications

Atoms versus photons as carriers of quantum states

Atoms versus photons as carriers of quantum states

Gate tunable parallel double quantum dots in InAs double-nanowire devices

High-fidelity two-qubit gates via dynamical decoupling of local1/fnoise at the optimal point

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