Quantum gates by periodic driving

Shi, Zhi‐Cheng; Wang, W.

doi:10.1038/srep22077

Cited by 29 publications

(54 citation statements)

References 71 publications

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“…As a result, the proposed interlaced device could not only enhance the voiding volume, but also reduced the energy consumption of the device. This energy saving property of the device makes it more suitable for its future integration with flexible energy harvesters, [41,42] raising the potential for a self-sustainable biomedical device. Table S1 The size of rat's bladder can be varied from animal to animal even if they have the same body weight.…”

Section: Wwwadvmattechnoldementioning

confidence: 99%

Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Hassani

Gammad

Mogan

et al. 2017

Adv Materials Technologies

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for such transformation. [3] Voluntary repeatable shape transformation, material biocompatibility, and small weight of NiTi shape memory alloy (SMA) actuators make them suitable for medical applications. [4][5][6][7][8][9][10][11][12] Usage of NiTi SMA actuators for muscular contraction, [8] artificial anal sphincter, [7] urethral valve, [13] myocardium, [8] drug delivery system, [3] and most recently, voiding of a bladder, [14] has been reported.The previous SMA-based actuator for voiding of a bladder consisted of a flexible vest that covered the bladder surface and physically contracted it upon the actuation of assembled SMA wires. [14] Since a fixed length was considered for SMA wires in this design, the device could be used for only one bladder size that was matched with the total inner diameter of actuator. The proposed design in our study has a more conformable vest that can be fitted for a wider range of bladder sizes in rats with similar body weight, and can substantially improve the voiding volume and energy consumption of the device.The previous SMA-based actuator was proposed for assisting the detrusor muscle in myogenic underactive bladder (UAB) patient with detrusor muscle contractility disorder but intact nerves. [14] Our study broadens the application of the actuating device also to neurogenic UAB patients suffering from both damaged detrusor muscle and nervous system; these patients are not able to rely on the natural nerve pathways to realize The use of shape memory alloy (SMA) actuators to restore voiding of bladder for myogenic under active bladder (UAB) patients is proposed recently. Even though previous work show the unique capability of this technology for bladder voiding, the low voiding volume and high energy consumption of the device limit the advancement of this technique. This study proposes a novel approach using an interlaced configuration to overcome these limitations. In this device, SMA actuators are threaded through rigid anchor points of the flexible vest. The novel anchorage of SMA actuators provides more conformability for the vest and lower energy consumption for the device, while the new interlaced configuration enhances the voiding volume. The device is tested initially on a rubber model for the bladder, then it is implanted in an anesthetized rat, and a voiding volume of more than 20% at 4 V is successfully achieved. A commercial force sensor is integrated with the device to make it suitable for neurogenic UAB patients. The sensor provides a feedback control signal to the patient to initiate the actuation of the device upon fullness of bladder. The overall system is a promising advance over the state-of-the-art providing bladder voiding in UAB patients.

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Section: Wwwadvmattechnoldementioning

confidence: 99%

Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Hassani

Gammad

Mogan

et al. 2017

Adv Materials Technologies

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“…Including strong interactions [90], and thus identifying an experimental regime for Floquet parafermions [91], is also an important direction for research. Lastly, we note that many recent ideas have suggested ways of using Floquet physics to enhance or realize necessary constituents for quantum computation, including qubits, gates, and braiding [92][93][94][95], and the system studied here may be ideally positioned to realize these features.…”

Section: Discussionmentioning

confidence: 97%

Floquet Majorana zero and π modes in planar Josephson junctions

2019

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We show how Floquet Majorana fermions may be experimentally realized by periodic driving of a solid-state platform. The system comprises a planar Josephson junction made of a proximitized heterostructure containing a 2D electron gas (2DEG) with Rashba spin-orbit coupling and Zeeman field. We map the sub-gap Andreev bound states of the junction to an effective one-dimensional Kitaev model with long range hopping and pairing terms. Using this effective model, we study the response of the system to periodic driving of the chemical potential, as applied via microwaves through a top-gate. We use the bulk Floquet topological invariants to characterize the system in terms of the number of zero and π Majorana modes for experimentally realistic parameters. We present signatures of these modes on differential conductance and local density of states. A notable feature is subharmonic response to the drive when both Majorana zero and π modes are present, thus opening up the possibility of using this feature to clearly identify Majorana modes. We highlight the robustness of these features to disorder, and show that despite hybridization due to long localization lengths, the main features of the subharmonic response are still identifiable in an experimental system that is readily accessible. arXiv:1812.05191v1 [cond-mat.mes-hall]

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“…The wavelength of ultrasound is critical to ensure both the resolution and penetration depth. The ultrasonic energy harvester is based on vibration, or sound waves, which can operate through either capacitance mode or piezoelectric mode . The ultrasonic energy harvesters generally utilize piezoelectric transducers to convert mechanical vibrations induced by acoustic waves into electrical power, in order to achieve a desirable power level for in vivo applications.…”

Section: Energy Transfer Devices Utilize Sources From the Surroundingmentioning

confidence: 99%

Materials Strategies and Device Architectures of Emerging Power Supply Devices for Implantable Bioelectronics

Huang

Wang

et al. 2019

Small

102

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Implantable bioelectronics represent an emerging technology that can be integrated into the human body for diagnostic and therapeutic functions. Power supply devices are an essential component of bioelectronics to ensure their robust performance. However, conventional power sources are usually bulky, rigid, and potentially contain hazardous constituent materials. The fact that biological organisms are soft, curvilinear, and have limited accommodation space poses new challenges for power supply systems to minimize the interface mismatch and still offer sufficient power to meet clinical‐grade applications. Here, recent advances in state‐of‐the‐art nonconventional power options for implantable electronics, specifically, miniaturized, flexible, or biodegradable power systems are reviewed. Material strategies and architectural design of a broad array of power devices are discussed, including energy storage systems (batteries and supercapacitors), power devices which harvest sources from the human body (biofuel cells, devices utilizing biopotentials, piezoelectric harvesters, triboelectric devices, and thermoelectric devices), and energy transfer devices which utilize sources in the surrounding environment (ultrasonic energy harvesters, inductive coupling/radiofrequency energy harvesters, and photovoltaic devices). Finally, future challenges and perspectives are given.

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Quantum gates by periodic driving

Cited by 29 publications

References 71 publications

Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Design and Anchorage Dependence of Shape Memory Alloy Actuators on Enhanced Voiding of a Bladder

Floquet Majorana zero and π modes in planar Josephson junctions

Materials Strategies and Device Architectures of Emerging Power Supply Devices for Implantable Bioelectronics

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