Coupled quantum dots as quantum gates
... coupling J(B,E,a) can be controlled by a magnetic field B ~leading to wave-function compression!, or by an electric field E ~leading to level detuning!, or by varying the barrier height or equivalently the interdot distance 2a ~leading to a suppression of tunneling between the dots!. The dependence ...
... coupling J(B,E,a) can be controlled by a magnetic field B ~leading to wave-function compression!, or by an electric field E ~leading to level detuning!, or by varying the barrier height or equivalently the interdot distance 2a ~leading to a suppression of tunneling between the dots!. The dependence ...
Probabilistic instantaneous quantum computation
... the engineer’s Bell-state analysis will not be the right one. However, in a situation 关as defined by conditions 共1兲–共3兲 given above兴 where it is of advantage to both have the correct output state for a problem and to know it at a very early time even if only with small probability, our scheme is of ...
... the engineer’s Bell-state analysis will not be the right one. However, in a situation 关as defined by conditions 共1兲–共3兲 given above兴 where it is of advantage to both have the correct output state for a problem and to know it at a very early time even if only with small probability, our scheme is of ...
Quantum Wires and Quantum Point Contacts
... non-Ohmic system: the series resistance is much smaller than the sum of the individual QPC resistances One needs quantum mechanics to understand such behavior – after the first QPC the electron beam gets collimated, and then it is prepared to pass through the second QPC without backscattering. ...
... non-Ohmic system: the series resistance is much smaller than the sum of the individual QPC resistances One needs quantum mechanics to understand such behavior – after the first QPC the electron beam gets collimated, and then it is prepared to pass through the second QPC without backscattering. ...
Quantum Copy-Protection and Quantum Money
... quantum |f from the software store, then we can only hope for computational security, not information-theoretic We know copy-protection is fundamentally impossible in the classical world (not that that’s stopped people from trying…) Question: Can you have a quantum state |f that lets you efficie ...
... quantum |f from the software store, then we can only hope for computational security, not information-theoretic We know copy-protection is fundamentally impossible in the classical world (not that that’s stopped people from trying…) Question: Can you have a quantum state |f that lets you efficie ...
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... • A great advantage of the optimal control gate sequence is that the maximum exchange interaction is about 500 times smaller than the typical exchange interaction of J/h=10.2 GHz in the Kane’s originalproposal and yet the CNOT gate operation time is still 3 times faster than that in the globally con ...
... • A great advantage of the optimal control gate sequence is that the maximum exchange interaction is about 500 times smaller than the typical exchange interaction of J/h=10.2 GHz in the Kane’s originalproposal and yet the CNOT gate operation time is still 3 times faster than that in the globally con ...
Talk(3.1)
... an unknown quantum state, MUST disturb the state (on average) • There is a fundamental quantifiable tradeoff between information extraction and disturbance. ...
... an unknown quantum state, MUST disturb the state (on average) • There is a fundamental quantifiable tradeoff between information extraction and disturbance. ...
Coulomb blockade in Quantum Dots
... with spin up and spin down. for the interested reader - When the temperature smearing of the Fermifunction in source and drain becomes comparable to a neighboring singleparticle level spacing, the additional channel can lead to an anomalous increase of the conductance maximum with temperature. Such ...
... with spin up and spin down. for the interested reader - When the temperature smearing of the Fermifunction in source and drain becomes comparable to a neighboring singleparticle level spacing, the additional channel can lead to an anomalous increase of the conductance maximum with temperature. Such ...
A Hierarchical Approach to Computer-Aided Design of
... methods developed to design them, such as formal representation, modeling and synthesis will have applications not only to quantum computing but also to DNA and other nano-technologies because of their reversible nature. In this paper we focus only on the synthesis of arbitrary quantum circuits (and ...
... methods developed to design them, such as formal representation, modeling and synthesis will have applications not only to quantum computing but also to DNA and other nano-technologies because of their reversible nature. In this paper we focus only on the synthesis of arbitrary quantum circuits (and ...
Spontaneous Emission Spectrum in Double Quantum Dot Devices
... absorption with stimulated and spontaneous emission. The most effectively coupled bosons in the specific environment of the semiconductor device used here were acoustic phonons. The experiments demonstrate the importance of vacuum fluctuations in the environment for quantum dot devices and potential ...
... absorption with stimulated and spontaneous emission. The most effectively coupled bosons in the specific environment of the semiconductor device used here were acoustic phonons. The experiments demonstrate the importance of vacuum fluctuations in the environment for quantum dot devices and potential ...
Quantum computing with nanoscale infrastructure
... the big problems, and are problems shared with all of the frontline teams in the US and Japan. To build a working quantum computer is fundamentally to try to beat nature on its home ground. A quantum ...
... the big problems, and are problems shared with all of the frontline teams in the US and Japan. To build a working quantum computer is fundamentally to try to beat nature on its home ground. A quantum ...
Electric-field-driven electron-transfer in mixed
... Our strategy for modeling the dynamics of ET in mixedvalence molecules begins by mapping the electronic degreesof-freedom to a two-state model, where each state represents the electron localized on one of the metal centers. The electronic system is then coupled to one key intramolecular vibrational ...
... Our strategy for modeling the dynamics of ET in mixedvalence molecules begins by mapping the electronic degreesof-freedom to a two-state model, where each state represents the electron localized on one of the metal centers. The electronic system is then coupled to one key intramolecular vibrational ...
Quantum Dot Single Photon Sources Quantum Dots
... repetition period of the exciting AC voltage matches the time difference between of the two arms, photons meet at the second beamsplitter. Distinguishability can be enforced with ...
... repetition period of the exciting AC voltage matches the time difference between of the two arms, photons meet at the second beamsplitter. Distinguishability can be enforced with ...
