Home › IPs

SOLID

Monitoring Ion Channel Function in Real Time through Quantum Decoherence

Thu, 2011-02-17 10:49 - Daniel Rudolph
Date: 
2010-10-11
Author(s): 

L. T. Hall, C. D. Hill, J. H. Cole, B. Städler, F. Caruso, P. Mulvaney, J. Wrachtrup, L. C. L. Hollenberg

Reference: 

Proceedings of the National Academy of Sciences of the United States of America (PNAS), Vol. 107, no. 44, 18777-18782, 2010

URL: 

http://www.pnas.org/content/107/44/18777.abstract

In drug discovery, there is a clear and urgent need for detection of cell-membrane ion-channel operation with wide-field capability. Existing techniques are generally invasive or require specialized nanostructures. We show that quantum nanotechnology could provide a solution. The nitrogen-vacancy (NV) center in nanodiamond is of great interest as a single-atom quantum probe for nanoscale processes. However, until now nothing was known about the quantum behavior of a NV probe in a complex biological environment.

Circuit-QED analogue of a single-atom injection maser: Lasing, trapping states and multistability

Thu, 2011-02-17 10:47 - Daniel Rudolph
Date: 
2010-12-16
Author(s): 

M. Marthaler, J. Leppäkangas, J. H. Cole

Reference: 

arXiv:1012.3577v1 [cond-mat.supr-con]

URL: 

http://arxiv.org/abs/1012.3577

We study a superconducting single-electron transistor (SSET) which is coupled to a LC-oscillator via the phase difference across one of the Josephson junctions. This leads to a strongly anharmonic coupling between the SSET and the oscillator. The coupling can oscillate with the number of photons which makes this system very similar to the single-atom injection maser. However, the advantage of a design based on superconducting circuits is the strong coupling and existence of standard methods to measure the radiation field in the oscillator.

Rabi spectroscopy of a driven qubit-fluctuator system

Thu, 2011-02-17 10:36 - Daniel Rudolph
Date: 
2010-03-25
Author(s): 

J. Lisenfeld, C. Müller, J. H. Cole, P. Bushev, A. Lukashenko, A. Shnirman, A. V. Ustinov

Reference: 

Phys. Rev. B (Rapid Comm.) 81, 100511(R) (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevB.81.100511

Electric Field Induced Removal of the Biexciton Binding Energy in a Single Quantum Dot

Thu, 2011-02-17 10:06 - Daniel Rudolph
Date: 
2011-01-12
Author(s): 

Michael E. Reimer, Maarten P. van Kouwen, Anne W. Hidma, Maarten H. M. van Weert, Erik P. A. M. Bakkers, Leo P. Kouwenhoven, and Val Zwiller

Reference: 

Nano Lett., 2011, 11 (2), pp 645–650

URL: 

http://pubs.acs.org/doi/abs/10.1021/nl1037424

We control the electrostatic environment of a single InAsP quantum dot in an InP nanowire with two contacts and two lateral gates positioned to an individual nanowire. We empty the quantum dot of excess charges and apply an electric field across its radial dimension. A large tuning range for the biexciton binding energy of 3 meV is obtained in a lateral electric field.

Unitary expansion of the time evolution operator

Mon, 2011-02-14 19:24 - Daniel Rudolph
Date: 
2010-10-21
Author(s): 

N. Zagury, A. Aragão, J. Casanova, and E. Solano

Reference: 

Phys. Rev. A 82, 042110 (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevA.82.042110

We propose an expansion of the unitary evolution operator, associated with a given Schrödinger equation, in terms of a finite product of explicit unitary operators. In this manner, this unitary expansion can be truncated at the desired level of approximation, as shown in the given examples.

Circuit quantum electrodynamics in the ultrastrong-coupling regime

Mon, 2011-02-14 19:22 - Daniel Rudolph
Date: 
2010-07-25
Author(s): 

T. Niemczyk, F. Deppe, H. Huebl, E. P. Menzel, F. Hocke, M. J. Schwarz, J. J. García-Ripoll, D.
Zueco, T. Hümmer, E. Solano, A. Marx, and R. Gross

Reference: 

Nature Physics 6, 772–776 (2010)

URL: 

http://www.nature.com/nphys/journal/v6/n10/abs/nphys1730.html

Klein tunneling and Dirac potentials in trapped ions

Mon, 2011-02-14 19:19 - Daniel Rudolph
Date: 
2010-08-27
Author(s): 

J. Casanova, J. J. García-Ripoll, R. Gerritsma, C. F. Roos, and E. Solano

Reference: 

Phys. Rev. A 82, 020101(R) (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevA.82.020101

Planck Spectroscopy and Quantum Noise of Microwave Beam Splitters

Mon, 2011-02-14 19:18 - Daniel Rudolph
Date: 
2010-09-20
Author(s): 

M. Mariantoni, E. P. Menzel, F. Deppe, M. A. Araque-Caballero, A. Baust, T. Niemczyk, E.
Hoffmann, E. Solano, A. Marx, and R. Gross

Reference: 

Phys. Rev. Lett. 105, 133601 (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevLett.105.133601

Dual-Path State Reconstruction Scheme for Propagating Quantum Microwaves and Detector Noise Tomography

Mon, 2011-02-14 19:17 - Daniel Rudolph
Date: 
2010-08-31
Author(s): 

E. P. Menzel, M. Mariantoni, F. Deppe, M. A. Araque-Caballero, A. Baust, T. Niemzcyk, E. Hoffmann, A. Marx, E. Solano, and R. Gross

Reference: 

Phys. Rev. Lett. 105, 100401 (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevLett.105.100401

Syndicate content