Publications

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2017

First Results from a Microwave Cavity Axion Search at 24 micro-eV

B.M. Brubaker, L. Zhong, Y.V. Gurevich, S.B. Cahn, S.K. Lamoreaux, M. Simanovskaia, J.R. Root, S.M. Lewis, A. Kenany, K.M. Backes, I. Urdinaran, N.M. Rapidis, T.M. Shokair, K.A. van Bibber, D.A. Palken, M. Malnou, W.F. Kindel, M.A. Anil, K.W. Lehnert, G. Carosi, Phys. Rev. Lett. 118, 061302 (2017).
DOI: 10.1103/PhysRevLett.118.061302
Publication Highlights

Featured in Physics 

Editors' suggestion

Improving Broadband Displacement Detection with Quantum Correlations

N.S. Kampel, R.W. Peterson, R. Fischer, P.L. Yu, K. Cicak, R.W. Simmonds, K.W. Lehnert, C.A. Regal, Phys. Rev. X 7, 021008 (2017).
DOI: 10.1103/PhysRevX.7.021008
Publication Highlights

JILA highlight

Single-sideband modulator for frequency domain multiplexing of superconducting qubit readout

B.J. Chapman, E.I. Rosenthal, J. Kerckhoff, L.R. Vale, G.C. Hilton, K.W. Lehnert, Applied Physics Letters 110, 162601 (2017).
DOI: 10.1063/1.4981390

Design and operational experience of a microwave cavity axion detector for the 20 - 100 micro-eV range

A. Kenany, M.A. Anil, K.M. Backes, B.M. Brubaker, S.B. Cahn, G. Carosi, Y.V. Gurevich, W.F. Kindel, S.K. Lamoreaux, K.W. Lehnert, S.M. Lewis, M. Malnou, D.A. Palken, N.M. Rapidis, J.R. Root, M. Simanovskaia, T.M. Shokair, I. Urdinaran, K.A. van Bibber, L. Zhong, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 854, 11 - 24 (2017).
DOI: http://dx.doi.org/10.1016/j.nima.2017.02.012

2016

Generation and efficient measurement of single photons from fixed-frequency superconducting qubits

W.F. Kindel, M.D. Schroer, K.W. Lehnert, Phys. Rev. A 93, 033817 (2016).
DOI: 10.1103/PhysRevA.93.033817

Closing a quantum feedback loop inside a cryostat: Autonomous state preparation and long-time memory of a superconducting qubit

C.Kraglund Andersen, J. Kerckhoff, K.W. Lehnert, B.J. Chapman, K. Mølmer, Phys. Rev. A 93, 012346 (2016).
DOI: 10.1103/PhysRevA.93.012346
Publication Highlights

Editors' suggestion

Proposal to Test Bell's Inequality in Electromechanics

S.G. Hofer, K.W. Lehnert, K. Hammerer, Phys. Rev. Lett. 116, 070406 (2016).
DOI: 10.1103/PhysRevLett.116.070406

Laser Cooling of a Micromechanical Membrane to the Quantum Backaction Limit

R.W. Peterson, T.P. Purdy, N.S. Kampel, R.W. Andrews, P.L. Yu, K.W. Lehnert, C.A. Regal, Phys. Rev. Lett. 116, 063601 (2016).
DOI: 10.1103/PhysRevLett.116.063601
Publication Highlights

Editors' suggestion

General purpose multiplexing device for cryogenic microwave systems

B.J. Chapman, B.A. Moores, E.I. Rosenthal, J. Kerckhoff, K.W. Lehnert, Applied Physics Letters 108, (2016).
DOI: 10.1063/1.4952772

Photon Efficient Electro-Optic Conversion via a Micromechanical Oscillator

K.W. Lehnert, C.A. Regal, R.W. Peterson, N.S. Kampel, P.S. Burns, A.P. Higginbotham, Conference on Lasers and Electro-Optics, (2016).
DOI: 10.1364/CLEO_SI.2016.SW4Q.5

2015

On-Chip Superconducting Microwave Circulator from Synthetic Rotation

J. Kerckhoff, K. Lalumière, B.J. Chapman, A. Blais, K.W. Lehnert, Phys. Rev. Applied 4, 034002 (2015).
DOI: 10.1103/PhysRevApplied.4.034002

Generating and verifying entangled itinerant microwave fields with efficient and independent measurements

H.S. Ku, W.F. Kindel, F. Mallet, S. Glancy, K.D. Irwin, G.C. Hilton, L.R. Vale, K.W. Lehnert, Phys. Rev. A 91, 042305 (2015).
DOI: 10.1103/PhysRevA.91.042305

Quantum-enabled temporal and spectral mode conversion of microwave signals

R.W. Andrews, A.P. Reed, K. Cicak, J.D. Teufel, K.W. Lehnert, Nature Communications 6, (2015).
DOI: 10.1038/ncomms10021

Connecting microwave and optical frequencies with a vibrational degree of freedom

R.W. Andrews, R.W. Peterson, T.P. Purdy, K. Cicak, R.W. Simmonds, C.A. Regal, K.W. Lehnert, SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII 9343, 934309 (2015).
DOI: 10.1117/12.2082941

2014

Future directions in the microwave cavity search for dark matter axions

T.M. Shokair, J. Root, K.A. van Bibber, B. Brubaker, Y.V. Gurevich, S.B. Cahn, S.K. Lamoreaux, M.A. Anil, K.W. Lehnert, B.K. Mitchell, A. Reed, G. Carosi, International Journal of Modern Physics A 29, 1443004 (2014).
DOI: 10.1142/S0217751X14430040

Measuring a Topological Transition in an Artificial Spin-1/2 System

D. Schroer, H. Kolodrubetz, F. Kindel, M. Sandberg, J. Gao, R. Vissers, P. Pappas, A. Polkovnikov, K.W. Lehnert, Physical Review Letters 113, 050402 (2014).
DOI: 10.1103/PhysRevLett.113.050402
Publication Highlights

Editors' suggestion

Bidirectional and efficient conversion between microwave and optical light

R.W. Andrews, R.W. Peterson, T.P. Purdy, K. Cicak, R.W. Simmonds, C.A. Regal, K.W. Lehnert, Nature Physics 10, 321–326 (2014).
DOI: 10.1038/nphys2911
Publication Highlights

Nature News and Views

2013

Deterministic entanglement of superconducting qubits by parity measurement and feedback

D. Ristè, M. Dukalski, C.A. Watson, G. de Lange, M.J. Tiggelman, Y.M. Blanter, K.W. Lehnert, R.N. Schouten, L. DiCarlo, Nature 502, 350 - 354 (2013).
DOI: 10.1038/nature12513

Entangling Mechanical Motion with Microwave Fields

T.A. Palomaki, J.D. Teufel, R.W. Simmonds, K.W. Lehnert, Science 342, 710-713 (2013).
DOI: 10.1126/science.1244563
Publication Highlights

Science Perspective

Analysis of single-photon and linear amplifier detectors for microwave cavity dark matter axion searches

S.K. Lamoreaux, K.A. van Bibber, K.W. Lehnert, G. Carosi, Physical Review D 88, 035020 (2013).
DOI: 10.1103/PhysRevD.88.035020

Tunable Coupling to a Mechanical Oscillator Circuit Using a Coherent Feedback Network

J. Kerckhoff, R.W. Anderson, H.S. Ku, W.F. Kindel, K. Cicak, R.W. Simmonds, K.W. Lehnert, Physical Review X 3, 021013 (2013).
DOI: 10.1103/PhysRevX.3.021013

Millisecond charge-parity fluctuations and induced decoherence in a superconducting transmon qubit

D. Ristè, C.C. Bultink, M.J. Tiggelman, R.N. Schouten, K.W. Lehnert, L. DiCarlo, Nature Communications 4, 1913 (2013).
DOI: 10.1038/ncomms2936

Mechanical resonators for storage and transfer of electrical and optical quantum states

S.A. McGee, D. Meiser, C.A. Regal, K.W. Lehnert, M.J. Holland, Physical Review A 87, 053818 (2013).
DOI: 10.1103/PhysRevA.87.053818

Coherent state transfer between itinerant microwave fields and a mechanical oscillator

T.A. Palomaki, J.W. Harlow, J.D. Teufel, R.W. Simmonds, K.W. Lehnert, Nature 495, 210 - 214 (2013).
DOI: 10.1038/nature11915

2012

Feedback Control of a Solid-State Qubit Using High-Fidelity Projective Measurement

D. Ristè, C.C. Bultink, K.W. Lehnert, L. DiCarlo, Physical Review Letters 109, 240502 (2012).
DOI: 10.1103/PhysRevLett.109.240502

Superconducting Microwave Multivibrator Produced by Coherent Feedback

J. Kerckhoff, K.W. Lehnert, Physical Review Letters 109, 153602 (2012).
DOI: 10.1103/PhysRevLett.109.153602

Initialization by Measurement of a Superconducting Quantum Bit Circuit

D. Ristè, J. van Leeuwen, H.S. Ku, K.W. Lehnert, L. DiCarlo, Physical Review Letters 109, 050507 (2012).
DOI: 10.1103/PhysRevLett.109.050507

Flux-Ramp Modulation for SQUID Multiplexing

J.A.B. Mates, K.D. Irwin, L.R. Vale, G.C. Hilton, J. Gao, K.W. Lehnert, Journal of Low Temperature Physics 167, 707-712 (2012).
DOI: 10.1007/s10909-012-0518-6

2011

Sideband cooling of micromechanical motion to the quantum ground state

J.D. Teufel, T. Donner, D. Li, J.W. Harlow, M.S. Allman, K. Cicak, A.J. Sirois, J.D. Whittaker, K.W. Lehnert, R.W. Simmonds, Nature 475, 359–363 (2011).
DOI: 10.1038/nature10261

Quantum State Tomography of an Itinerant Squeezed Microwave Field

F. Mallet, M.A. Castellanos-Beltran, H.S. Ku, S. Glancy, E. Knill, K.D. Irwin, G.C. Hilton, L.R. Vale, K.W. Lehnert, Physical Review Letters 106, 220502 (2011).
DOI: 10.1103/PhysRevLett.106.220502

Design and Testing of Superconducting Microwave Passive Components for Quantum Information Processing

H.S. Ku, F. Mallet, L.R. Vale, K.D. Irwin, S.E. Russek, G.C. Hilton, K.W. Lehnert, IEEE Transactions on Applied Superconductivity 21, 452 - 455 (2011).
DOI: 10.1109/TASC.2010.2089403

From cavity electromechanics to cavity optomechanics

C.A. Regal, K.W. Lehnert, Journal of Physics: Conference Series 264, 012025 (2011).
DOI: 10.1088/1742-6596/264/1/012025

Strongly quadrature-dependent noise in superconducting microresonators measured at the vacuum-noise limit

J. Gao, L.R. Vale, J.A.B. Mates, D.R. Schmidt, G.C. Hilton, K.D. Irwin, F. Mallet, M.A. Castellanos-Beltran, K.W. Lehnert, J. Zmuidzinas, H.G. Leduc, Applied Physics Letters 98, 232508 (2011).
DOI: 10.1063/1.3597156

Non-contact and all-electrical method for monitoring the motion of semiconducting nanowires

S.W. Hoch, J.R. Montague, V.M. Bright, C.T. Rogers, K.A. Bertness, J.D. Teufel, K.W. Lehnert, Applied Physics Letters 99, 053101 (2011).
DOI: 10.1063/1.3614562

2009

Nanomechanical motion measured with an imprecision below that at the standard quantum limit

J.D. Teufel, T. Donner, M.A. Castellanos-Beltran, J.W. Harlow, K.W. Lehnert, Nature Nanotechnology 4, 820 - 823 (2009).
DOI: 10.1038/nnano.2009.343

Bandwidth and Dynamic Range of a Widely Tunable Josephson Parametric Amplifier

M.A. Castellanos-Beltran, K.D. Irwin, L.R. Vale, G.C. Hilton, K.W. Lehnert, IEEE Transactions on Applied Superconductivity 19, 944–947 (2009).
DOI: 10.1109/TASC.2009.2018119

2008

Measuring nanomechanical motion with a microwave cavity interferometer

C.A. Regal, J.D. Teufel, K.W. Lehnert, Nature Physics 4, 555 - 560 (2008).
DOI: 10.1038/nphys974

Demonstration of a multiplexer of dissipationless superconducting quantum interference devices

J.A.B. Mates, G.C. Hilton, K.D. Irwin, L.R. Vale, K.W. Lehnert, Applied Physics Letters 92, 023514 (2008).
DOI: 10.1063/1.2803852

Amplification and squeezing of quantum noise with a tunable Josephson metamaterial

M.A. Castellanos-Beltran, K.D. Irwin, G.C. Hilton, L.R. Vale, K.W. Lehnert, Nature Physics 4, 929 - 931 (2008).
DOI: 10.1038/nphys1090

Dynamical Backaction of Microwave Fields on a Nanomechanical Oscillator

J.D. Teufel, J.W. Harlow, C.A. Regal, K.W. Lehnert, Physical Review Letters 101, (2008).
DOI: 10.1103/PhysRevLett.101.197203
Publication Highlights

Editors' suggestion

Prospects for cooling nanomechanical motion by coupling to a superconducting microwave resonator

J.D. Teufel, C.A. Regal, K.W. Lehnert, New Journal of Physics 10, 095002 (2008).
DOI: 10.1088/1367-2630/10/9/095002

2007

Intrinsic Noise Properties of Atomic Point Contact Displacement Detectors

N.E. Flowers-Jacobs, D. Schmidt, K.W. Lehnert, Physical Review Letters 98, (2007).
DOI: 10.1103/PhysRevLett.98.096804

Widely tunable parametric amplifier based on a superconducting quantum interference device array resonator

M.A. Castellanos-Beltran, K.W. Lehnert, Applied Physics Letters 91, 083509 (2007).
DOI: 10.1063/1.2773988

Evaluation of a Microwave SQUID Multiplexer Prototype

K.W. Lehnert, K.D. Irwin, M.A. Castellanos-Beltran, J.A.B. Mates, L.R. Vale, IEEE Transactions on Applied Superconductivity 17, 705 - 709 (2007).
DOI: 10.1109/TASC.2007.898118

2006

Microwave SQUID multiplexers for low-temperature detectors

K.D. Irwin, J.A. Beall, W.B. Doriese, W.D. Duncan, G.C. Hilton, J.A.B. Mates, C.D. Reintsema, D.R. Schmidt, J.N. Ullom, L.R. Vale, B.L. Zink, K.W. Lehnert, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 559, 802 - 804 (2006).
DOI: 10.1016/j.nima.2005.12.144

Normal metal–insulator–superconductor junction technology for bolometers

D.R. Schmidt, W.D. Duncan, K.D. Irwin, K.W. Lehnert, N.A. Miller, J.N. Ullom, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 559, 516 - 518 (2006).
DOI: 10.1016/j.nima.2005.12.043

2005

Single-electron transistor backaction on the single-electron box

B. Turek, K.W. Lehnert, A.A. Clerk, D. Gunnarsson, K. Bladh, P. Delsing, R.J. Schoelkopf, Physical Review B 71, (2005).
DOI: 10.1103/PhysRevB.71.193304

A superconductor–insulator–normal metal bolometer with microwave readout suitable for large-format arrays

D.R. Schmidt, K.W. Lehnert, A.M. Clark, W.D. Duncan, K.D. Irwin, N. Miller, J.N. Ullom, Applied Physics Letters 86, 053505 (2005).
DOI: 10.1063/1.1855411

2004

Noise performance of the radio-frequency single-electron transistor

L. Roschier, P. Hakonen, K. Bladh, P. Delsing, K.W. Lehnert, L. Spietz, R.J. Schoelkopf, Journal of Applied Physics 95, 1274 (2004).
DOI: 10.1063/1.1635972

Noise performance of the radio-frequency single-electron transistor

R.J. Schoelkopf, L. Spietz, K.W. Lehnert, L. Roschier, P. Hakonen, K. Bladh, P. Delsing, Journal of Applied Physics 95, 1274 (2004).
DOI: 10.1063/1.1635972

Microwave SQUID multiplexer

K.D. Irwin, K.W. Lehnert, Applied Physics Letters 85, 2107 (2004).
DOI: 10.1063/1.1791733

2003

Measurement of the Excited-State Lifetime of a Microelectronic Circuit

K.W. Lehnert, K. Bladh, L. Spietz, D. Gunnarsson, D. Schuster, P. Delsing, R.J. Schoelkopf, Physical Review Letters 90, (2003).
DOI: 10.1103/PhysRevLett.90.027002

Quantum Charge Fluctuations and the Polarizability of the Single-Electron Box

K.W. Lehnert, B. Turek, K. Bladh, L. Spietz, D. Gunnarsson, P. Delsing, R.J. Schoelkopf, Physical Review Letters 91, (2003).
DOI: 10.1103/PhysRevLett.91.106801

Measurement of the Excited-State Lifetime of a Microelectronic Circuit

K.W. Lehnert, K. Bladh, L. Spietz, D. Gunnarsson, D. Schuster, P. Delsing, R.J. Schoelkopf, Physical Review Letters 90, (2003).
DOI: 10.1103/PhysRevLett.90.027002

Primary Electronic Thermometry Using the Shot Noise of a Tunnel Junction

L. Spietz, K.W. Lehnert, I. Siddiqi, R.J. Schoelkopf, Science 300, 1929 - 1932 (2003).
DOI: 10.1126/science.1084647

Noise and measurement backaction in superconducting circuits: qubits as spectrometers of quantum noise

R.J. Schoelkopf, A.A. Clerk, S.M. Girvin, K.W. Lehnert, M.H. Devoret, SPIE Proceedings: First International Symposium on Fluctuations and Noise and Information in Nanoelectronics, Sensors, and Standards, (2003).
DOI: 10.1117/12.488922

2002

Density-dependent critical currents in quantum-well-coupled weak links

T.A. Eckhause, K.W. Lehnert, J.S. Correa, R.J. Jorstad, E.G. Gwinn, M. Thomas, Applied Physics Letters 81, 3203 (2002).
DOI: 10.1063/1.1517174

A high-performance cryogenic amplifier based on a radio-frequency single electron transistor

K. Segall, K.W. Lehnert, T.R. Stevenson, R.J. Schoelkopf, P. Wahlgren, A. Aassime, P. Delsing, Applied Physics Letters 81, 4859 (2002).
DOI: 10.1063/1.1530751