Corpus ID: 9131723

Coherent oscillations between classically separable quantum states of a superconducting loop

@article{Manucharyan2009CoherentOB,
  title={Coherent oscillations between classically separable quantum states of a superconducting loop},
  author={Vladimir E Manucharyan and Jens Koch and Markus Brink and Leonid I. Glazman and Michel H. Devoret},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  year={2009}
}
Ten years ago, coherent oscillations between two quantum states of a superconducting circuit differing by the presence or absence of a single Cooper pair on a metallic island were observed for the first time. This result immediately stimulated the development of several other types of superconducting quantum circuits behaving as artificial atoms, thus bridging mesoscopic and atomic physics. Interestingly, none of these circuits fully implements the now almost 30 year old proposal of A. J… Expand

Figures from this paper

Feedback control of superconducting quantum circuits
Superconducting circuits have recently risen to the forefront of the solid-state prototypes for quantum computing. Reaching the stage of robust quantum computing requires closing the loop betweenExpand
Quantum-to-classical transition in cavity quantum electrodynamics.
TLDR
This work explores in detail the continuous quantum-to-classical crossover and demonstrates how to extract effective cavity field temperatures from both spectroscopic and time-resolved vacuum Rabi measurements. Expand
Basic Concepts in Quantum Information
In the last 25 years a new understanding has evolved of the role of information in quantum mechanics. At the same time there has been tremendous progress in atomic/optical physics and condensedExpand
Improving Coherence of Superconducting Qubits and Resonators
Improving Coherence of Superconducting Qubits and Resonators Kurtis Lee Geerlings 2013 Superconducting qubits and resonators with quality factors exceeding 10 are of great interest for quantumExpand
A toy model of a macroscopic quantum coherent system
This paper deals with macroscopic quantum coherence while using only basic quantum mechanics. A square double well is used to illustrate Leggett–Caldeira oscillations. The effect of thermal radiationExpand
Coherent dynamics in long fluxonium qubits
We analyze the coherent dynamics of a fluxonium device (Manucharyan et al 2009 Science 326 113) formed by a superconducting ring of Josephson junctions in which strong quantum phase fluctuations areExpand
O ct 2 01 2 A toy model for Macroscopic Quantum Coherence
  • 2014

References

SHOWING 1-10 OF 40 REFERENCES
Quantum superposition of distinct macroscopic states
TLDR
Experimental evidence is presented that a superconducting quantum interference device (SQUID) can be put into a superposition of two magnetic-flux states: one corresponding to a few microamperes of current flowing clockwise, the other corresponding to the same amount ofCurrent flowing anticlockwise. Expand
Coherent control of macroscopic quantum states in a single-Cooper-pair box
A nanometre-scale superconducting electrode connected to a reservoir via a Josephson junction constitutes an artificial two-level electronic system: a single-Cooper-pair box. The two levels consistExpand
Coherent Quantum Dynamics of a Superconducting Flux Qubit
TLDR
The observed coherent time evolution between two quantum states of a superconducting flux qubit comprising three Josephson junctions in a loop is promising for future solid-state quantum computing. Expand
Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
TLDR
It is shown that the strong coupling regime can be attained in a solid-state system, and the concept of circuit quantum electrodynamics opens many new possibilities for studying the strong interaction of light and matter. Expand
Nanomechanical measurements of a superconducting qubit
TLDR
Measurements of a NEMS resonator coupled to a superconducting qubit, a Cooper-pair box, demonstrate that the coupling results in a dispersive shift of the nanomechanical frequency that is the mechanical analogue of the ‘single-atom index effect’ experienced by electromagnetic resonators in cavity quantum electrodynamics. Expand
Quantum superposition of macroscopic persistent-current states.
TLDR
Level repulsion of the ground state and first excited state is found where two classical persistent-current states with opposite polarity are degenerate, indicating symmetric and antisymmetric quantum superpositions of macroscopic states. Expand
Superconducting nanocircuits for topologically protected qubits
For successful realization of a quantum computer, its building blocks—the individual qubits—should be simultaneously scalable and sufficiently protected from environmental noise. Recently, a novelExpand
Manipulating quantum entanglement with atoms and photons in a cavity
After they have interacted, quantum particles generally behave as a single nonseparable entangled system. The concept of entanglement plays an essential role in quantum physics. We have performedExpand
Possible realization of an ideal quantum computer in Josephson junction array
We introduce a class of Josephson arrays which have nontrivial topology and exhibit a novel state at low temperatures. This state is characterized by long-range order in a two Cooper pair condensateExpand
Macroscopic Quantum Tunneling
Macroscopic quantum phenomena are particularly important when considering the problem of Schrödinger’s cat. This book contains a coherent and self-contained account of such phenomena, focusing on theExpand
...
1
2
3
4
...